diff --git a/.idea/.gitignore b/.idea/.gitignore
new file mode 100644
index 00000000..13566b81
--- /dev/null
+++ b/.idea/.gitignore
@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
diff --git a/.idea/c_sharp.iml b/.idea/c_sharp.iml
new file mode 100644
index 00000000..d6ebd480
--- /dev/null
+++ b/.idea/c_sharp.iml
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$" />
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/.idea/inspectionProfiles/Project_Default.xml b/.idea/inspectionProfiles/Project_Default.xml
new file mode 100644
index 00000000..03d9549e
--- /dev/null
+++ b/.idea/inspectionProfiles/Project_Default.xml
@@ -0,0 +1,6 @@
+<component name="InspectionProjectProfileManager">
+  <profile version="1.0">
+    <option name="myName" value="Project Default" />
+    <inspection_tool class="Eslint" enabled="true" level="WARNING" enabled_by_default="true" />
+  </profile>
+</component>
\ No newline at end of file
diff --git a/.idea/misc.xml b/.idea/misc.xml
new file mode 100644
index 00000000..639900d1
--- /dev/null
+++ b/.idea/misc.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectRootManager">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/modules.xml b/.idea/modules.xml
new file mode 100644
index 00000000..6af55c46
--- /dev/null
+++ b/.idea/modules.xml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/c_sharp.iml" filepath="$PROJECT_DIR$/.idea/c_sharp.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
new file mode 100644
index 00000000..35eb1ddf
--- /dev/null
+++ b/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/src/.DS_Store b/src/.DS_Store
new file mode 100644
index 00000000..b74adc47
Binary files /dev/null and b/src/.DS_Store differ
diff --git a/src/backend/.DS_Store b/src/backend/.DS_Store
new file mode 100644
index 00000000..c0876389
Binary files /dev/null and b/src/backend/.DS_Store differ
diff --git a/src/backend/.idea/compiler.xml b/src/backend/.idea/compiler.xml
index bcba8915..12e0270d 100644
--- a/src/backend/.idea/compiler.xml
+++ b/src/backend/.idea/compiler.xml
@@ -6,9 +6,8 @@
         <outputRelativeToContentRoot value="true" />
         <processorPath useClasspath="false">
           <entry name="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.projectlombok/lombok/1.18.36/5a30490a6e14977d97d9c73c924c1f1b5311ea95/lombok-1.18.36.jar" />
-          <entry name="$USER_HOME$/.gradle/caches/modules-2/files-2.1/org.springframework.boot/spring-boot-configuration-processor/3.3.7/fead10e56c500ccc1fcdada0f79fe4f81c19fef4/spring-boot-configuration-processor-3.3.7.jar" />
         </processorPath>
-        <module name="stock_server.main" />
+        <module name="signaling_server.main" />
       </profile>
     </annotationProcessing>
   </component>
diff --git a/src/backend/.idea/gradle.xml b/src/backend/.idea/gradle.xml
index 43ba7ce9..c026657e 100644
--- a/src/backend/.idea/gradle.xml
+++ b/src/backend/.idea/gradle.xml
@@ -11,6 +11,14 @@
           </set>
         </option>
       </GradleProjectSettings>
+      <GradleProjectSettings>
+        <option name="externalProjectPath" value="$PROJECT_DIR$/signaling_server" />
+        <option name="modules">
+          <set>
+            <option value="$PROJECT_DIR$/signaling_server" />
+          </set>
+        </option>
+      </GradleProjectSettings>
       <GradleProjectSettings>
         <option name="externalProjectPath" value="$PROJECT_DIR$/stock_server" />
         <option name="modules">
diff --git a/src/backend/.idea/misc.xml b/src/backend/.idea/misc.xml
index d696a87d..84852a65 100644
--- a/src/backend/.idea/misc.xml
+++ b/src/backend/.idea/misc.xml
@@ -1,6 +1,9 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="ExternalStorageConfigurationManager" enabled="true" />
+  <component name="FrameworkDetectionExcludesConfiguration">
+    <file type="web" url="file://$PROJECT_DIR$/signaling_server" />
+  </component>
   <component name="ProjectRootManager" version="2" project-jdk-name="azul-17" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
diff --git a/src/backend/.idea/modules.xml b/src/backend/.idea/modules.xml
index e066844e..92628c2e 100644
--- a/src/backend/.idea/modules.xml
+++ b/src/backend/.idea/modules.xml
@@ -2,7 +2,15 @@
 <project version="4">
   <component name="ProjectModuleManager">
     <modules>
-      <module fileurl="file://$PROJECT_DIR$/.idea/backend.iml" filepath="$PROJECT_DIR$/.idea/backend.iml" />
+      <module fileurl="file://$PROJECT_DIR$/.idea/modules/common_module.iml" filepath="$PROJECT_DIR$/.idea/modules/common_module.iml" />
+      <module fileurl="file://$PROJECT_DIR$/.idea/modules/common_module.main.iml" filepath="$PROJECT_DIR$/.idea/modules/common_module.main.iml" />
+      <module fileurl="file://$PROJECT_DIR$/.idea/modules/signaling_server.main.iml" filepath="$PROJECT_DIR$/.idea/modules/signaling_server.main.iml" />
+      <module fileurl="file://$PROJECT_DIR$/.idea/modules/stock_server.iml" filepath="$PROJECT_DIR$/.idea/modules/stock_server.iml" />
+      <module fileurl="file://$PROJECT_DIR$/.idea/modules/stock_server.main.iml" filepath="$PROJECT_DIR$/.idea/modules/stock_server.main.iml" />
+      <module fileurl="file://$PROJECT_DIR$/.idea/modules/stock_server.test.iml" filepath="$PROJECT_DIR$/.idea/modules/stock_server.test.iml" />
+      <module fileurl="file://$PROJECT_DIR$/.idea/modules/workspace_server.iml" filepath="$PROJECT_DIR$/.idea/modules/workspace_server.iml" />
+      <module fileurl="file://$PROJECT_DIR$/.idea/modules/workspace_server.main.iml" filepath="$PROJECT_DIR$/.idea/modules/workspace_server.main.iml" />
+      <module fileurl="file://$PROJECT_DIR$/.idea/modules/workspace_server.test.iml" filepath="$PROJECT_DIR$/.idea/modules/workspace_server.test.iml" />
     </modules>
   </component>
 </project>
\ No newline at end of file
diff --git a/src/backend/.idea/modules/common_module.iml b/src/backend/.idea/modules/common_module.iml
new file mode 100644
index 00000000..e44cb71b
--- /dev/null
+++ b/src/backend/.idea/modules/common_module.iml
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module external.linked.project.id="common_module" external.linked.project.path="$MODULE_DIR$/../../common_module" external.root.project.path="$MODULE_DIR$/../../common_module" external.system.id="GRADLE" external.system.module.group="com.jootalkpia" external.system.module.version="0.0.1-SNAPSHOT" type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_17" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$/../../common_module">
+      <excludeFolder url="file://$MODULE_DIR$/../../common_module/.gradle" />
+      <excludeFolder url="file://$MODULE_DIR$/../../common_module/build" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/src/backend/.idea/modules/common_module.main.iml b/src/backend/.idea/modules/common_module.main.iml
new file mode 100644
index 00000000..4b775d40
--- /dev/null
+++ b/src/backend/.idea/modules/common_module.main.iml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module version="4">
+  <component name="AdditionalModuleElements">
+    <content url="file://$MODULE_DIR$/../../common_module/build/generated/sources/annotationProcessor/java/main">
+      <sourceFolder url="file://$MODULE_DIR$/../../common_module/build/generated/sources/annotationProcessor/java/main" isTestSource="false" generated="true" />
+    </content>
+  </component>
+</module>
\ No newline at end of file
diff --git a/src/backend/.idea/modules/common_module.test.iml b/src/backend/.idea/modules/common_module.test.iml
new file mode 100644
index 00000000..e7d93c56
--- /dev/null
+++ b/src/backend/.idea/modules/common_module.test.iml
@@ -0,0 +1,53 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module external.linked.project.id="common_module:test" external.linked.project.path="$MODULE_DIR$/../../common_module" external.root.project.path="$MODULE_DIR$/../../common_module" external.system.id="GRADLE" external.system.module.group="com.jootalkpia" external.system.module.type="sourceSet" external.system.module.version="0.0.1-SNAPSHOT" type="JAVA_MODULE" version="4">
+  <component name="FacetManager">
+    <facet external-system-id="GRADLE" type="web" name="Web">
+      <configuration>
+        <webroots />
+      </configuration>
+    </facet>
+  </component>
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_17">
+    <output-test url="file://$MODULE_DIR$/../../common_module/build/classes/java/test" />
+    <exclude-output />
+    <content url="file://$MODULE_DIR$/../../common_module/src/test" />
+    <orderEntry type="jdk" jdkName="azul-17" jdkType="JavaSDK" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="module" module-name="common_module.main" />
+    <orderEntry type="library" name="Gradle: org.springframework.boot:spring-boot-starter-web:3.3.7" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.boot:spring-boot-starter:3.3.7" level="project" />
+    <orderEntry type="library" name="Gradle: com.fasterxml.jackson.core:jackson-databind:2.17.3" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.boot:spring-boot-starter-json:3.3.7" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.boot:spring-boot-starter-tomcat:3.3.7" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework:spring-webmvc:6.1.16" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework:spring-web:6.1.16" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.boot:spring-boot-autoconfigure:3.3.7" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.boot:spring-boot:3.3.7" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.boot:spring-boot-starter-logging:3.3.7" level="project" />
+    <orderEntry type="library" name="Gradle: jakarta.annotation:jakarta.annotation-api:2.1.1" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework:spring-core:6.1.16" level="project" />
+    <orderEntry type="library" name="Gradle: org.yaml:snakeyaml:2.2" level="project" />
+    <orderEntry type="library" name="Gradle: com.fasterxml.jackson.core:jackson-annotations:2.17.3" level="project" />
+    <orderEntry type="library" name="Gradle: com.fasterxml.jackson.core:jackson-core:2.17.3" level="project" />
+    <orderEntry type="library" name="Gradle: com.fasterxml.jackson.datatype:jackson-datatype-jsr310:2.17.3" level="project" />
+    <orderEntry type="library" name="Gradle: com.fasterxml.jackson.datatype:jackson-datatype-jdk8:2.17.3" level="project" />
+    <orderEntry type="library" name="Gradle: com.fasterxml.jackson.module:jackson-module-parameter-names:2.17.3" level="project" />
+    <orderEntry type="library" name="Gradle: org.apache.tomcat.embed:tomcat-embed-websocket:10.1.34" level="project" />
+    <orderEntry type="library" name="Gradle: org.apache.tomcat.embed:tomcat-embed-core:10.1.34" level="project" />
+    <orderEntry type="library" name="Gradle: org.apache.tomcat.embed:tomcat-embed-el:10.1.34" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework:spring-context:6.1.16" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework:spring-aop:6.1.16" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework:spring-beans:6.1.16" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework:spring-expression:6.1.16" level="project" />
+    <orderEntry type="library" name="Gradle: io.micrometer:micrometer-observation:1.13.9" level="project" />
+    <orderEntry type="library" name="Gradle: ch.qos.logback:logback-classic:1.5.12" level="project" />
+    <orderEntry type="library" name="Gradle: org.apache.logging.log4j:log4j-to-slf4j:2.23.1" level="project" />
+    <orderEntry type="library" name="Gradle: org.slf4j:jul-to-slf4j:2.0.16" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework:spring-jcl:6.1.16" level="project" />
+    <orderEntry type="library" name="Gradle: io.micrometer:micrometer-commons:1.13.9" level="project" />
+    <orderEntry type="library" name="Gradle: ch.qos.logback:logback-core:1.5.12" level="project" />
+    <orderEntry type="library" name="Gradle: org.slf4j:slf4j-api:2.0.16" level="project" />
+    <orderEntry type="library" name="Gradle: org.apache.logging.log4j:log4j-api:2.23.1" level="project" />
+  </component>
+  <component name="TestModuleProperties" production-module="common_module.main" />
+</module>
\ No newline at end of file
diff --git a/src/backend/.idea/modules/signaling_server.main.iml b/src/backend/.idea/modules/signaling_server.main.iml
new file mode 100644
index 00000000..5587070e
--- /dev/null
+++ b/src/backend/.idea/modules/signaling_server.main.iml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module version="4">
+  <component name="AdditionalModuleElements">
+    <content url="file://$MODULE_DIR$/../../signaling_server/build/generated/sources/annotationProcessor/java/main">
+      <sourceFolder url="file://$MODULE_DIR$/../../signaling_server/build/generated/sources/annotationProcessor/java/main" isTestSource="false" generated="true" />
+    </content>
+  </component>
+</module>
\ No newline at end of file
diff --git a/src/backend/.idea/modules/stock_server.iml b/src/backend/.idea/modules/stock_server.iml
new file mode 100644
index 00000000..d2822dc5
--- /dev/null
+++ b/src/backend/.idea/modules/stock_server.iml
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module external.linked.project.id="stock_server" external.linked.project.path="$MODULE_DIR$/../../stock_server" external.root.project.path="$MODULE_DIR$/../../stock_server" external.system.id="GRADLE" external.system.module.group="com.example" external.system.module.version="0.0.1-SNAPSHOT" type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_17" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$/../../stock_server">
+      <excludeFolder url="file://$MODULE_DIR$/../../stock_server/.gradle" />
+      <excludeFolder url="file://$MODULE_DIR$/../../stock_server/build" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/src/backend/.idea/modules/stock_server.main.iml b/src/backend/.idea/modules/stock_server.main.iml
new file mode 100644
index 00000000..807ddc5b
--- /dev/null
+++ b/src/backend/.idea/modules/stock_server.main.iml
@@ -0,0 +1,78 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module external.linked.project.id="stock_server:main" external.linked.project.path="$MODULE_DIR$/../../stock_server" external.root.project.path="$MODULE_DIR$/../../stock_server" external.system.id="GRADLE" external.system.module.group="com.example" external.system.module.type="sourceSet" external.system.module.version="0.0.1-SNAPSHOT" type="JAVA_MODULE" version="4">
+  <component name="FacetManager">
+    <facet external-system-id="GRADLE" type="web" name="Web">
+      <configuration>
+        <webroots />
+      </configuration>
+    </facet>
+  </component>
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_17">
+    <output url="file://$MODULE_DIR$/../../stock_server/build/classes/java/main" />
+    <exclude-output />
+    <content url="file://$MODULE_DIR$/../../stock_server/src/main">
+      <sourceFolder url="file://$MODULE_DIR$/../../stock_server/src/main/java" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/../../stock_server/src/main/resources" type="java-resource" />
+    </content>
+    <orderEntry type="jdk" jdkName="azul-17" jdkType="JavaSDK" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" scope="PROVIDED" name="Gradle: org.projectlombok:lombok:1.18.36" level="project" />
+    <orderEntry type="library" scope="PROVIDED" name="Gradle: org.springframework.boot:spring-boot-configuration-processor:3.3.7" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.boot:spring-boot-starter-data-mongodb:3.3.7" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.boot:spring-boot-starter-web:3.3.7" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.cloud:spring-cloud-starter-openfeign:4.1.4" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.boot:spring-boot-starter:3.3.7" level="project" />
+    <orderEntry type="library" name="Gradle: org.mongodb:mongodb-driver-sync:5.0.1" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.data:spring-data-mongodb:4.3.7" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.boot:spring-boot-starter-json:3.3.7" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.boot:spring-boot-starter-tomcat:3.3.7" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework:spring-webmvc:6.1.16" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework:spring-web:6.1.16" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.cloud:spring-cloud-starter:4.1.5" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.cloud:spring-cloud-openfeign-core:4.1.4" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.cloud:spring-cloud-commons:4.1.5" level="project" />
+    <orderEntry type="library" name="Gradle: io.github.openfeign:feign-slf4j:13.5" level="project" />
+    <orderEntry type="library" name="Gradle: io.github.openfeign:feign-core:13.5" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.boot:spring-boot-autoconfigure:3.3.7" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.boot:spring-boot:3.3.7" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.boot:spring-boot-starter-logging:3.3.7" level="project" />
+    <orderEntry type="library" name="Gradle: jakarta.annotation:jakarta.annotation-api:2.1.1" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework:spring-core:6.1.16" level="project" />
+    <orderEntry type="library" name="Gradle: org.yaml:snakeyaml:2.2" level="project" />
+    <orderEntry type="library" name="Gradle: org.mongodb:mongodb-driver-core:5.0.1" level="project" />
+    <orderEntry type="library" name="Gradle: org.mongodb:bson:5.0.1" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework:spring-tx:6.1.16" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework:spring-context:6.1.16" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.data:spring-data-commons:3.3.7" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework:spring-beans:6.1.16" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework:spring-expression:6.1.16" level="project" />
+    <orderEntry type="library" name="Gradle: org.slf4j:slf4j-api:2.0.16" level="project" />
+    <orderEntry type="library" name="Gradle: com.fasterxml.jackson.datatype:jackson-datatype-jsr310:2.17.3" level="project" />
+    <orderEntry type="library" name="Gradle: com.fasterxml.jackson.module:jackson-module-parameter-names:2.17.3" level="project" />
+    <orderEntry type="library" name="Gradle: com.fasterxml.jackson.datatype:jackson-datatype-jdk8:2.17.3" level="project" />
+    <orderEntry type="library" name="Gradle: com.fasterxml.jackson.core:jackson-databind:2.17.3" level="project" />
+    <orderEntry type="library" name="Gradle: org.apache.tomcat.embed:tomcat-embed-websocket:10.1.34" level="project" />
+    <orderEntry type="library" name="Gradle: org.apache.tomcat.embed:tomcat-embed-core:10.1.34" level="project" />
+    <orderEntry type="library" name="Gradle: org.apache.tomcat.embed:tomcat-embed-el:10.1.34" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework:spring-aop:6.1.16" level="project" />
+    <orderEntry type="library" name="Gradle: io.micrometer:micrometer-observation:1.13.9" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.cloud:spring-cloud-context:4.1.5" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.security:spring-security-rsa:1.1.3" level="project" />
+    <orderEntry type="library" name="Gradle: io.github.openfeign:feign-form-spring:13.5" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.security:spring-security-crypto:6.3.6" level="project" />
+    <orderEntry type="library" name="Gradle: ch.qos.logback:logback-classic:1.5.12" level="project" />
+    <orderEntry type="library" name="Gradle: org.apache.logging.log4j:log4j-to-slf4j:2.23.1" level="project" />
+    <orderEntry type="library" name="Gradle: org.slf4j:jul-to-slf4j:2.0.16" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework:spring-jcl:6.1.16" level="project" />
+    <orderEntry type="library" name="Gradle: com.fasterxml.jackson.core:jackson-annotations:2.17.3" level="project" />
+    <orderEntry type="library" name="Gradle: com.fasterxml.jackson.core:jackson-core:2.17.3" level="project" />
+    <orderEntry type="library" name="Gradle: io.micrometer:micrometer-commons:1.13.9" level="project" />
+    <orderEntry type="library" name="Gradle: org.bouncycastle:bcprov-jdk18on:1.78" level="project" />
+    <orderEntry type="library" name="Gradle: io.github.openfeign:feign-form:13.5" level="project" />
+    <orderEntry type="library" name="Gradle: commons-fileupload:commons-fileupload:1.5" level="project" />
+    <orderEntry type="library" name="Gradle: ch.qos.logback:logback-core:1.5.12" level="project" />
+    <orderEntry type="library" name="Gradle: org.apache.logging.log4j:log4j-api:2.23.1" level="project" />
+    <orderEntry type="library" name="Gradle: commons-io:commons-io:2.11.0" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: org.mongodb:bson-record-codec:5.0.1" level="project" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/src/backend/.idea/modules/stock_server.test.iml b/src/backend/.idea/modules/stock_server.test.iml
new file mode 100644
index 00000000..1718923d
--- /dev/null
+++ b/src/backend/.idea/modules/stock_server.test.iml
@@ -0,0 +1,107 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module external.linked.project.id="stock_server:test" external.linked.project.path="$MODULE_DIR$/../../stock_server" external.root.project.path="$MODULE_DIR$/../../stock_server" external.system.id="GRADLE" external.system.module.group="com.example" external.system.module.type="sourceSet" external.system.module.version="0.0.1-SNAPSHOT" type="JAVA_MODULE" version="4">
+  <component name="FacetManager">
+    <facet external-system-id="GRADLE" type="web" name="Web">
+      <configuration>
+        <webroots />
+      </configuration>
+    </facet>
+  </component>
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_17">
+    <output-test url="file://$MODULE_DIR$/../../stock_server/build/classes/java/test" />
+    <exclude-output />
+    <content url="file://$MODULE_DIR$/../../stock_server/src/test">
+      <sourceFolder url="file://$MODULE_DIR$/../../stock_server/src/test/java" isTestSource="true" />
+    </content>
+    <orderEntry type="jdk" jdkName="azul-17" jdkType="JavaSDK" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="module" module-name="stock_server.main" />
+    <orderEntry type="library" name="Gradle: org.springframework.boot:spring-boot-starter-data-mongodb:3.3.7" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.boot:spring-boot-starter-web:3.3.7" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.cloud:spring-cloud-starter-openfeign:4.1.4" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.boot:spring-boot-starter-test:3.3.7" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.boot:spring-boot-starter:3.3.7" level="project" />
+    <orderEntry type="library" name="Gradle: org.mongodb:mongodb-driver-sync:5.0.1" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.data:spring-data-mongodb:4.3.7" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.boot:spring-boot-starter-json:3.3.7" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.boot:spring-boot-starter-tomcat:3.3.7" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework:spring-webmvc:6.1.16" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework:spring-web:6.1.16" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.cloud:spring-cloud-starter:4.1.5" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.cloud:spring-cloud-openfeign-core:4.1.4" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.cloud:spring-cloud-commons:4.1.5" level="project" />
+    <orderEntry type="library" name="Gradle: io.github.openfeign:feign-slf4j:13.5" level="project" />
+    <orderEntry type="library" name="Gradle: io.github.openfeign:feign-core:13.5" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.boot:spring-boot-test-autoconfigure:3.3.7" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.boot:spring-boot-test:3.3.7" level="project" />
+    <orderEntry type="library" name="Gradle: com.jayway.jsonpath:json-path:2.9.0" level="project" />
+    <orderEntry type="library" name="Gradle: jakarta.xml.bind:jakarta.xml.bind-api:4.0.2" level="project" />
+    <orderEntry type="library" name="Gradle: net.minidev:json-smart:2.5.1" level="project" />
+    <orderEntry type="library" name="Gradle: org.assertj:assertj-core:3.25.3" level="project" />
+    <orderEntry type="library" name="Gradle: org.awaitility:awaitility:4.2.2" level="project" />
+    <orderEntry type="library" name="Gradle: org.hamcrest:hamcrest:2.2" level="project" />
+    <orderEntry type="library" name="Gradle: org.junit.jupiter:junit-jupiter:5.10.5" level="project" />
+    <orderEntry type="library" name="Gradle: org.mockito:mockito-junit-jupiter:5.11.0" level="project" />
+    <orderEntry type="library" name="Gradle: org.mockito:mockito-core:5.11.0" level="project" />
+    <orderEntry type="library" name="Gradle: org.skyscreamer:jsonassert:1.5.3" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework:spring-test:6.1.16" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework:spring-core:6.1.16" level="project" />
+    <orderEntry type="library" name="Gradle: org.xmlunit:xmlunit-core:2.9.1" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.boot:spring-boot-autoconfigure:3.3.7" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.boot:spring-boot:3.3.7" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.boot:spring-boot-starter-logging:3.3.7" level="project" />
+    <orderEntry type="library" name="Gradle: jakarta.annotation:jakarta.annotation-api:2.1.1" level="project" />
+    <orderEntry type="library" name="Gradle: org.yaml:snakeyaml:2.2" level="project" />
+    <orderEntry type="library" name="Gradle: org.mongodb:mongodb-driver-core:5.0.1" level="project" />
+    <orderEntry type="library" name="Gradle: org.mongodb:bson:5.0.1" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework:spring-tx:6.1.16" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework:spring-context:6.1.16" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.data:spring-data-commons:3.3.7" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework:spring-beans:6.1.16" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework:spring-expression:6.1.16" level="project" />
+    <orderEntry type="library" name="Gradle: org.slf4j:slf4j-api:2.0.16" level="project" />
+    <orderEntry type="library" name="Gradle: com.fasterxml.jackson.datatype:jackson-datatype-jsr310:2.17.3" level="project" />
+    <orderEntry type="library" name="Gradle: com.fasterxml.jackson.module:jackson-module-parameter-names:2.17.3" level="project" />
+    <orderEntry type="library" name="Gradle: com.fasterxml.jackson.datatype:jackson-datatype-jdk8:2.17.3" level="project" />
+    <orderEntry type="library" name="Gradle: com.fasterxml.jackson.core:jackson-databind:2.17.3" level="project" />
+    <orderEntry type="library" name="Gradle: org.apache.tomcat.embed:tomcat-embed-websocket:10.1.34" level="project" />
+    <orderEntry type="library" name="Gradle: org.apache.tomcat.embed:tomcat-embed-core:10.1.34" level="project" />
+    <orderEntry type="library" name="Gradle: org.apache.tomcat.embed:tomcat-embed-el:10.1.34" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework:spring-aop:6.1.16" level="project" />
+    <orderEntry type="library" name="Gradle: io.micrometer:micrometer-observation:1.13.9" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.cloud:spring-cloud-context:4.1.5" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.security:spring-security-rsa:1.1.3" level="project" />
+    <orderEntry type="library" name="Gradle: io.github.openfeign:feign-form-spring:13.5" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.security:spring-security-crypto:6.3.6" level="project" />
+    <orderEntry type="library" name="Gradle: jakarta.activation:jakarta.activation-api:2.1.3" level="project" />
+    <orderEntry type="library" name="Gradle: net.minidev:accessors-smart:2.5.1" level="project" />
+    <orderEntry type="library" name="Gradle: net.bytebuddy:byte-buddy:1.14.19" level="project" />
+    <orderEntry type="library" name="Gradle: org.junit.jupiter:junit-jupiter-params:5.10.5" level="project" />
+    <orderEntry type="library" name="Gradle: org.junit.jupiter:junit-jupiter-api:5.10.5" level="project" />
+    <orderEntry type="library" name="Gradle: net.bytebuddy:byte-buddy-agent:1.14.19" level="project" />
+    <orderEntry type="library" name="Gradle: com.vaadin.external.google:android-json:0.0.20131108.vaadin1" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework:spring-jcl:6.1.16" level="project" />
+    <orderEntry type="library" name="Gradle: ch.qos.logback:logback-classic:1.5.12" level="project" />
+    <orderEntry type="library" name="Gradle: org.apache.logging.log4j:log4j-to-slf4j:2.23.1" level="project" />
+    <orderEntry type="library" name="Gradle: org.slf4j:jul-to-slf4j:2.0.16" level="project" />
+    <orderEntry type="library" name="Gradle: com.fasterxml.jackson.core:jackson-annotations:2.17.3" level="project" />
+    <orderEntry type="library" name="Gradle: com.fasterxml.jackson.core:jackson-core:2.17.3" level="project" />
+    <orderEntry type="library" name="Gradle: io.micrometer:micrometer-commons:1.13.9" level="project" />
+    <orderEntry type="library" name="Gradle: org.bouncycastle:bcprov-jdk18on:1.78" level="project" />
+    <orderEntry type="library" name="Gradle: io.github.openfeign:feign-form:13.5" level="project" />
+    <orderEntry type="library" name="Gradle: commons-fileupload:commons-fileupload:1.5" level="project" />
+    <orderEntry type="library" name="Gradle: org.ow2.asm:asm:9.6" level="project" />
+    <orderEntry type="library" scope="PROVIDED" name="Gradle: org.apiguardian:apiguardian-api:1.1.2" level="project" />
+    <orderEntry type="library" name="Gradle: org.junit.platform:junit-platform-commons:1.10.5" level="project" />
+    <orderEntry type="library" name="Gradle: org.opentest4j:opentest4j:1.3.0" level="project" />
+    <orderEntry type="library" name="Gradle: ch.qos.logback:logback-core:1.5.12" level="project" />
+    <orderEntry type="library" name="Gradle: org.apache.logging.log4j:log4j-api:2.23.1" level="project" />
+    <orderEntry type="library" name="Gradle: commons-io:commons-io:2.11.0" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: org.junit.platform:junit-platform-launcher:1.10.5" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: org.junit.platform:junit-platform-engine:1.10.5" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: org.junit.jupiter:junit-jupiter-engine:5.10.5" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: org.objenesis:objenesis:3.3" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: org.mongodb:bson-record-codec:5.0.1" level="project" />
+  </component>
+  <component name="TestModuleProperties" production-module="stock_server.main" />
+</module>
\ No newline at end of file
diff --git a/src/backend/.idea/modules/workspace_server.iml b/src/backend/.idea/modules/workspace_server.iml
new file mode 100644
index 00000000..0918f592
--- /dev/null
+++ b/src/backend/.idea/modules/workspace_server.iml
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module external.linked.project.id="workspace_server" external.linked.project.path="$MODULE_DIR$/../../workspace_server" external.root.project.path="$MODULE_DIR$/../../workspace_server" external.system.id="GRADLE" external.system.module.group="com.jootalkpia" external.system.module.version="0.0.1-SNAPSHOT" type="JAVA_MODULE" version="4">
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_17" inherit-compiler-output="true">
+    <exclude-output />
+    <content url="file://$MODULE_DIR$/../../workspace_server">
+      <excludeFolder url="file://$MODULE_DIR$/../../workspace_server/.gradle" />
+      <excludeFolder url="file://$MODULE_DIR$/../../workspace_server/build" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file
diff --git a/src/backend/.idea/modules/workspace_server.main.iml b/src/backend/.idea/modules/workspace_server.main.iml
new file mode 100644
index 00000000..71503cb9
--- /dev/null
+++ b/src/backend/.idea/modules/workspace_server.main.iml
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module version="4">
+  <component name="AdditionalModuleElements">
+    <content url="file://$MODULE_DIR$/../../workspace_server/build/generated/sources/annotationProcessor/java/main">
+      <sourceFolder url="file://$MODULE_DIR$/../../workspace_server/build/generated/sources/annotationProcessor/java/main" isTestSource="false" generated="true" />
+    </content>
+  </component>
+</module>
\ No newline at end of file
diff --git a/src/backend/.idea/modules/workspace_server.test.iml b/src/backend/.idea/modules/workspace_server.test.iml
new file mode 100644
index 00000000..1b40bf12
--- /dev/null
+++ b/src/backend/.idea/modules/workspace_server.test.iml
@@ -0,0 +1,171 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<module external.linked.project.id="workspace_server:test" external.linked.project.path="$MODULE_DIR$/../../workspace_server" external.root.project.path="$MODULE_DIR$/../../workspace_server" external.system.id="GRADLE" external.system.module.group="com.jootalkpia" external.system.module.type="sourceSet" external.system.module.version="0.0.1-SNAPSHOT" type="JAVA_MODULE" version="4">
+  <component name="FacetManager">
+    <facet external-system-id="GRADLE" type="web" name="Web">
+      <configuration>
+        <webroots />
+      </configuration>
+    </facet>
+  </component>
+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_17">
+    <output-test url="file://$MODULE_DIR$/../../workspace_server/build/classes/java/test" />
+    <exclude-output />
+    <content url="file://$MODULE_DIR$/../../workspace_server/src/test">
+      <sourceFolder url="file://$MODULE_DIR$/../../workspace_server/src/test/java" isTestSource="true" />
+    </content>
+    <orderEntry type="jdk" jdkName="azul-17" jdkType="JavaSDK" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="module" module-name="workspace_server.main" />
+    <orderEntry type="library" name="Gradle: org.springframework.boot:spring-boot-starter-data-jpa:3.3.7" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.boot:spring-boot-starter-web:3.3.7" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.kafka:spring-kafka:3.2.6" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.boot:spring-boot-starter-test:3.3.7" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.kafka:spring-kafka-test:3.2.6" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.boot:spring-boot-starter-aop:3.3.7" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.boot:spring-boot-starter-jdbc:3.3.7" level="project" />
+    <orderEntry type="library" name="Gradle: org.hibernate.orm:hibernate-core:6.5.3.Final" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.data:spring-data-jpa:3.3.7" level="project" />
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+    <orderEntry type="library" name="Gradle: org.springframework.boot:spring-boot-starter-json:3.3.7" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.boot:spring-boot-starter:3.3.7" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.boot:spring-boot-starter-tomcat:3.3.7" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework:spring-webmvc:6.1.16" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework:spring-web:6.1.16" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework:spring-context:6.1.16" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework:spring-messaging:6.1.16" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework:spring-tx:6.1.16" level="project" />
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+    <orderEntry type="library" name="Gradle: org.springframework.boot:spring-boot-test-autoconfigure:3.3.7" level="project" />
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+    <orderEntry type="library" name="Gradle: org.assertj:assertj-core:3.25.3" level="project" />
+    <orderEntry type="library" name="Gradle: org.awaitility:awaitility:4.2.2" level="project" />
+    <orderEntry type="library" name="Gradle: org.hamcrest:hamcrest:2.2" level="project" />
+    <orderEntry type="library" name="Gradle: org.junit.jupiter:junit-jupiter:5.10.5" level="project" />
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+    <orderEntry type="library" name="Gradle: org.springframework.boot:spring-boot:3.3.7" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework.boot:spring-boot-starter-logging:3.3.7" level="project" />
+    <orderEntry type="library" name="Gradle: org.yaml:snakeyaml:2.2" level="project" />
+    <orderEntry type="library" name="Gradle: org.apache.tomcat.embed:tomcat-embed-websocket:10.1.34" level="project" />
+    <orderEntry type="library" name="Gradle: org.apache.tomcat.embed:tomcat-embed-core:10.1.34" level="project" />
+    <orderEntry type="library" name="Gradle: org.apache.tomcat.embed:tomcat-embed-el:10.1.34" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework:spring-expression:6.1.16" level="project" />
+    <orderEntry type="library" name="Gradle: io.micrometer:micrometer-commons:1.13.9" level="project" />
+    <orderEntry type="library" name="Gradle: jakarta.activation:jakarta.activation-api:2.1.3" level="project" />
+    <orderEntry type="library" name="Gradle: net.minidev:accessors-smart:2.5.1" level="project" />
+    <orderEntry type="library" name="Gradle: net.bytebuddy:byte-buddy:1.14.19" level="project" />
+    <orderEntry type="library" name="Gradle: org.junit.jupiter:junit-jupiter-params:5.10.5" level="project" />
+    <orderEntry type="library" name="Gradle: net.bytebuddy:byte-buddy-agent:1.14.19" level="project" />
+    <orderEntry type="library" name="Gradle: com.vaadin.external.google:android-json:0.0.20131108.vaadin1" level="project" />
+    <orderEntry type="library" name="Gradle: org.springframework:spring-jcl:6.1.16" level="project" />
+    <orderEntry type="library" name="Gradle: org.apache.kafka:kafka-streams:3.7.2" level="project" />
+    <orderEntry type="library" scope="PROVIDED" name="Gradle: org.scala-lang:scala-library:2.13.12" level="project" />
+    <orderEntry type="library" name="Gradle: org.junit.platform:junit-platform-commons:1.10.5" level="project" />
+    <orderEntry type="library" name="Gradle: org.opentest4j:opentest4j:1.3.0" level="project" />
+    <orderEntry type="library" scope="PROVIDED" name="Gradle: org.apiguardian:apiguardian-api:1.1.2" level="project" />
+    <orderEntry type="library" name="Gradle: org.junit.platform:junit-platform-engine:1.10.5" level="project" />
+    <orderEntry type="library" name="Gradle: ch.qos.logback:logback-classic:1.5.12" level="project" />
+    <orderEntry type="library" name="Gradle: org.apache.zookeeper:zookeeper-jute:3.8.4" level="project" />
+    <orderEntry type="library" name="Gradle: org.apache.yetus:audience-annotations:0.12.0" level="project" />
+    <orderEntry type="library" name="Gradle: io.netty:netty-handler:4.1.116.Final" level="project" />
+    <orderEntry type="library" name="Gradle: io.netty:netty-transport-native-epoll:4.1.116.Final" level="project" />
+    <orderEntry type="library" name="Gradle: ch.qos.logback:logback-core:1.5.12" level="project" />
+    <orderEntry type="library" scope="PROVIDED" name="Gradle: commons-io:commons-io:2.11.0" level="project" />
+    <orderEntry type="library" name="Gradle: com.fasterxml.jackson.core:jackson-annotations:2.17.3" level="project" />
+    <orderEntry type="library" name="Gradle: com.fasterxml.jackson.core:jackson-core:2.17.3" level="project" />
+    <orderEntry type="library" name="Gradle: org.apache.logging.log4j:log4j-to-slf4j:2.23.1" level="project" />
+    <orderEntry type="library" name="Gradle: org.slf4j:jul-to-slf4j:2.0.16" level="project" />
+    <orderEntry type="library" name="Gradle: org.ow2.asm:asm:9.6" level="project" />
+    <orderEntry type="library" name="Gradle: org.rocksdb:rocksdbjni:7.9.2" level="project" />
+    <orderEntry type="library" name="Gradle: io.netty:netty-transport-native-unix-common:4.1.116.Final" level="project" />
+    <orderEntry type="library" name="Gradle: io.netty:netty-codec:4.1.116.Final" level="project" />
+    <orderEntry type="library" name="Gradle: io.netty:netty-transport:4.1.116.Final" level="project" />
+    <orderEntry type="library" name="Gradle: io.netty:netty-resolver:4.1.116.Final" level="project" />
+    <orderEntry type="library" name="Gradle: io.netty:netty-buffer:4.1.116.Final" level="project" />
+    <orderEntry type="library" name="Gradle: io.netty:netty-common:4.1.116.Final" level="project" />
+    <orderEntry type="library" name="Gradle: io.netty:netty-transport-classes-epoll:4.1.116.Final" level="project" />
+    <orderEntry type="library" name="Gradle: org.apache.logging.log4j:log4j-api:2.23.1" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: org.postgresql:postgresql:42.7.4" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: org.checkerframework:checker-qual:3.42.0" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: org.glassfish.jaxb:jaxb-runtime:4.0.5" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: org.jboss.logging:jboss-logging:3.5.3.Final" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: org.hibernate.common:hibernate-commons-annotations:6.0.6.Final" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: io.smallrye:jandex:3.1.2" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: com.fasterxml:classmate:1.7.0" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: jakarta.inject:jakarta.inject-api:2.0.1" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: com.github.luben:zstd-jni:1.5.6-4" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: org.lz4:lz4-java:1.8.0" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: org.xerial.snappy:snappy-java:1.1.10.5" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: org.junit.jupiter:junit-jupiter-engine:5.10.5" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: org.objenesis:objenesis:3.3" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: org.apache.kafka:kafka-group-coordinator:3.7.2" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: org.apache.kafka:kafka-raft:3.7.2" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: org.apache.kafka:kafka-storage:3.7.2" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: org.apache.kafka:kafka-storage-api:3.7.2" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: org.apache.kafka:kafka-server:3.7.2" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: org.apache.kafka:kafka-tools-api:3.7.2" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: com.yammer.metrics:metrics-core:2.2.0" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: org.bitbucket.b_c:jose4j:0.9.4" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: com.typesafe.scala-logging:scala-logging_2.13:3.9.4" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: io.dropwizard.metrics:metrics-core:4.1.12.1" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: com.fasterxml.jackson.dataformat:jackson-dataformat-csv:2.17.3" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: com.fasterxml.jackson.module:jackson-module-scala_2.13:2.17.3" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: commons-io:commons-io:2.14.0" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: net.sf.jopt-simple:jopt-simple:5.0.4" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: net.sourceforge.argparse4j:argparse4j:0.7.0" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: commons-validator:commons-validator:1.7" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: org.scala-lang.modules:scala-collection-compat_2.13:2.10.0" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: org.scala-lang.modules:scala-java8-compat_2.13:1.0.2" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: org.scala-lang:scala-reflect:2.13.12" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: commons-cli:commons-cli:1.4" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: org.scala-lang:scala-library:2.13.13" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: org.pcollections:pcollections:4.0.1" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: org.glassfish.jaxb:jaxb-core:4.0.5" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: com.github.ben-manes.caffeine:caffeine:3.1.8" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: com.thoughtworks.paranamer:paranamer:2.8" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: commons-beanutils:commons-beanutils:1.9.4" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: commons-digester:commons-digester:2.1" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: commons-collections:commons-collections:3.2.2" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: org.eclipse.angus:angus-activation:2.0.2" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: org.glassfish.jaxb:txw2:4.0.5" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: com.sun.istack:istack-commons-runtime:4.1.2" level="project" />
+    <orderEntry type="library" scope="RUNTIME" name="Gradle: com.google.errorprone:error_prone_annotations:2.21.1" level="project" />
+  </component>
+  <component name="TestModuleProperties" production-module="workspace_server.main" />
+</module>
\ No newline at end of file
diff --git a/src/backend/signaling_server/.DS_Store b/src/backend/signaling_server/.DS_Store
new file mode 100644
index 00000000..cc883214
Binary files /dev/null and b/src/backend/signaling_server/.DS_Store differ
diff --git a/src/backend/signaling_server/.gitattributes b/src/backend/signaling_server/.gitattributes
new file mode 100644
index 00000000..8af972cd
--- /dev/null
+++ b/src/backend/signaling_server/.gitattributes
@@ -0,0 +1,3 @@
+/gradlew text eol=lf
+*.bat text eol=crlf
+*.jar binary
diff --git a/src/backend/signaling_server/.gitignore b/src/backend/signaling_server/.gitignore
new file mode 100644
index 00000000..1f21df6a
--- /dev/null
+++ b/src/backend/signaling_server/.gitignore
@@ -0,0 +1,38 @@
+HELP.md
+.gradle
+local.env
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
diff --git a/src/backend/signaling_server/Dockerfile b/src/backend/signaling_server/Dockerfile
new file mode 100644
index 00000000..a64cac30
--- /dev/null
+++ b/src/backend/signaling_server/Dockerfile
@@ -0,0 +1,142 @@
+# Ubuntu Bionic 기반
+FROM ubuntu:bionic
+
+# 기본 패키지 설치
+RUN set -x \
+    && apt-get update \
+    && apt-get install -y --no-install-recommends \
+       build-essential git wget golang \
+       python3 python3-pip python3-setuptools python3-wheel ninja-build \
+       libgstreamer1.0-dev libgirepository1.0-dev libunwind-dev apt-utils libsrtp-dev \
+       gdb libmicrohttpd-dev libjansson-dev libnice-dev \
+       libssl-dev libsofia-sip-ua-dev libglib2.0-dev libopus-dev libogg-dev \
+       libconfig-dev libavutil-dev libavcodec-dev libavformat-dev libnanomsg-dev \
+       libcurl4-openssl-dev liblua5.3-dev pkg-config gengetopt libtool automake \
+       curl jq httpie vim screen doxygen graphviz \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/*
+
+# Node.js 16 및 npm 설치
+RUN curl -fsSL https://deb.nodesource.com/setup_16.x | bash - \
+    && apt-get install -y nodejs \
+    && npm install -g wscat
+
+# CMake 설치
+RUN set -x \
+    && wget https://cmake.org/files/v3.16/cmake-3.16.2.tar.gz \
+    && tar -xvzf cmake-3.16.2.tar.gz \
+    && cd cmake-3.16.2 \
+    && ./bootstrap --prefix=/usr/local \
+    && make -j$(nproc) && make install \
+    && cd .. && rm -rf cmake-3.16.2 cmake-3.16.2.tar.gz
+
+# Clang 10 설치 및 설정
+RUN set -x \
+    && apt-get update \
+    && apt-get install -y clang-10 \
+    && update-alternatives --install /usr/bin/clang clang /usr/bin/clang-10 100 \
+    && update-alternatives --install /usr/bin/clang++ clang++ /usr/bin/clang++-10 100
+
+# boringssl 설치
+RUN set -x \
+    && git clone https://boringssl.googlesource.com/boringssl \
+    && cd boringssl \
+    && mkdir build \
+    && cd build \
+    && cmake -GNinja -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ -DCMAKE_C_FLAGS="-Wno-error" .. \
+    && ninja \
+    && mkdir -p /opt/boringssl/lib \
+    && cp ssl/libssl.a /opt/boringssl/lib/ \
+    && cp crypto/libcrypto.a /opt/boringssl/lib/ \
+    && cp -r ../include /opt/boringssl/ \
+    && cd ../.. \
+    && rm -rf boringssl
+
+# Python 패키지 설치
+RUN set -x \
+    && python3 -m pip install --upgrade pip \
+    && python3 -m pip install scikit-build \
+    && python3 -m pip install meson ninja
+
+# libsrtp 설치
+RUN set -x \
+    && wget https://github.com/cisco/libsrtp/archive/v2.2.0.tar.gz \
+    && tar xfv v2.2.0.tar.gz  \
+    && cd libsrtp-2.2.0/ \
+    && ./configure --prefix=/usr --enable-openssl \
+    && make shared_library && make install \
+    && cd .. && rm -rf libsrtp-2.2.0 v2.2.0.tar.gz
+
+# libwebsockets 설치
+RUN set -x \
+    && git clone https://github.com/warmcat/libwebsockets.git \
+    && cd libwebsockets \
+    && mkdir build \
+    && cd build \
+    && cmake -DLWS_MAX_SMP=1 -DLWS_WITHOUT_EXTENSIONS=0 -DCMAKE_INSTALL_PREFIX:PATH=/usr -DCMAKE_C_FLAGS="-fpic" .. \
+    && make -j$(nproc) && make install \
+    && cd ../.. && rm -rf libwebsockets
+
+# libnice 설치
+RUN set -x \
+    && git clone https://gitlab.freedesktop.org/libnice/libnice \
+    && cd libnice \
+    && meson --prefix=/usr build && ninja -C build && ninja -C build install \
+    && cd .. && rm -rf libnice
+
+# Janus 빌드 및 설치
+RUN export JANUS_WITH_POSTPROCESSING
+RUN set -x \
+    && git clone https://github.com/meetecho/janus-gateway.git \
+    && cd janus-gateway \
+    && sh autogen.sh \
+    && ./configure --prefix=/opt/janus \
+    && make -j$(nproc) \
+    && make install \
+    && make configs \
+    && cd .. && rm -rf janus-gateway
+
+# WebSockets 및 TURN/STUN 서버 설정 추가
+RUN echo ' \
+general: { \
+        ws = true \n\
+        ws_port = 8188 \n\
+        ws_interface = "0.0.0.0" \n\
+        secure = false \n\
+        ws_pingpong_interval = 50 \n\
+        ws_pingpong_timeout = 500 \n\
+} \
+' > /opt/janus/etc/janus/janus.transport.websockets.jcfg
+
+# TURN/STUN 설정 추가
+RUN echo ' \
+nat: { \n\
+    stun_server = "stun.l.google.com" \n\
+    stun_port = 19302 \n\
+    turn_server = "turn:coturn-container" \n\
+    turn_port = 3478 \n\
+    turn_type = "udp" \n\
+    turn_user = "jootalkpia" \n\
+    turn_pwd = "1234" \n\
+} \n\
+' >> /opt/janus/etc/janus/janus.jcfg
+
+# WebSockets transport 활성화
+RUN echo 'include = janus.transport.websockets.jcfg' >> /opt/janus/etc/janus/janus.jcfg
+
+# 불필요한 소스 삭제
+RUN set -x \
+    && rm -rf /libwebsockets \
+    && rm -rf /janus-gateway \
+    && rm -rf /boringssl
+
+# janus 사용자 추가 및 권한 설정
+RUN adduser --disabled-password --gecos '' janus
+RUN chown -R janus:janus /opt/janus
+RUN chmod -R 755 /opt/janus
+USER janus
+
+EXPOSE 8188 3478/udp 5349/tcp 5349/udp
+
+# 컨테이너 실행 시 Janus 실행
+CMD ["/opt/janus/bin/janus"]
\ No newline at end of file
diff --git a/src/backend/signaling_server/build.gradle b/src/backend/signaling_server/build.gradle
new file mode 100644
index 00000000..641230ab
--- /dev/null
+++ b/src/backend/signaling_server/build.gradle
@@ -0,0 +1,55 @@
+plugins {
+    id 'java'
+    id 'org.springframework.boot' version '3.4.2'
+    id 'io.spring.dependency-management' version '1.1.7'
+}
+
+group = 'com.jootalkpia'
+version = '0.0.1-SNAPSHOT'
+
+java {
+    toolchain {
+        languageVersion = JavaLanguageVersion.of(17)
+    }
+}
+
+configurations {
+    compileOnly {
+        extendsFrom annotationProcessor
+    }
+}
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    implementation 'org.springframework.boot:spring-boot-starter-web'
+    implementation 'org.springframework.boot:spring-boot-starter-webflux'
+    implementation 'org.springframework.boot:spring-boot-starter-websocket'
+    implementation 'org.springframework.boot:spring-boot-starter-data-redis'
+
+    implementation 'com.fasterxml.jackson.core:jackson-databind'
+
+    // WebSocket API
+    implementation 'jakarta.websocket:jakarta.websocket-api:2.1.0'
+
+    // Lombok
+    compileOnly 'org.projectlombok:lombok'
+    annotationProcessor 'org.projectlombok:lombok'
+
+    // DNS 해석기 라이브러리
+    implementation 'io.netty:netty-resolver-dns-native-macos:4.1.68.Final:osx-aarch_64'
+
+    implementation 'org.springframework.boot:spring-boot-starter-websocket'
+    implementation 'org.kurento:kurento-client:7.0.0'
+
+    implementation 'org.json:json:20210307'
+
+    testImplementation 'org.springframework.boot:spring-boot-starter-test'
+    testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
+}
+
+tasks.named('test') {
+    useJUnitPlatform()
+}
diff --git a/src/backend/signaling_server/gradle/wrapper/gradle-wrapper.jar b/src/backend/signaling_server/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 00000000..a4b76b95
Binary files /dev/null and b/src/backend/signaling_server/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/src/backend/signaling_server/gradle/wrapper/gradle-wrapper.properties b/src/backend/signaling_server/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 00000000..e2847c82
--- /dev/null
+++ b/src/backend/signaling_server/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.11.1-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/src/backend/signaling_server/gradlew b/src/backend/signaling_server/gradlew
new file mode 100755
index 00000000..f5feea6d
--- /dev/null
+++ b/src/backend/signaling_server/gradlew
@@ -0,0 +1,252 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s
+' "$PWD" ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"
diff --git a/src/backend/signaling_server/gradlew.bat b/src/backend/signaling_server/gradlew.bat
new file mode 100644
index 00000000..9d21a218
--- /dev/null
+++ b/src/backend/signaling_server/gradlew.bat
@@ -0,0 +1,94 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+@rem SPDX-License-Identifier: Apache-2.0
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/src/backend/signaling_server/settings.gradle b/src/backend/signaling_server/settings.gradle
new file mode 100644
index 00000000..37b0d2fb
--- /dev/null
+++ b/src/backend/signaling_server/settings.gradle
@@ -0,0 +1 @@
+rootProject.name = 'signaling_server'
diff --git a/src/backend/signaling_server/src/.DS_Store b/src/backend/signaling_server/src/.DS_Store
new file mode 100644
index 00000000..1b5b1a09
Binary files /dev/null and b/src/backend/signaling_server/src/.DS_Store differ
diff --git a/src/backend/signaling_server/src/main/.DS_Store b/src/backend/signaling_server/src/main/.DS_Store
new file mode 100644
index 00000000..634c67f0
Binary files /dev/null and b/src/backend/signaling_server/src/main/.DS_Store differ
diff --git a/src/backend/signaling_server/src/main/java/.DS_Store b/src/backend/signaling_server/src/main/java/.DS_Store
new file mode 100644
index 00000000..6dddd857
Binary files /dev/null and b/src/backend/signaling_server/src/main/java/.DS_Store differ
diff --git a/src/backend/signaling_server/src/main/java/com/.DS_Store b/src/backend/signaling_server/src/main/java/com/.DS_Store
new file mode 100644
index 00000000..a7b6b68c
Binary files /dev/null and b/src/backend/signaling_server/src/main/java/com/.DS_Store differ
diff --git a/src/backend/signaling_server/src/main/java/com/jootalkpia/.DS_Store b/src/backend/signaling_server/src/main/java/com/jootalkpia/.DS_Store
new file mode 100644
index 00000000..ec840aa5
Binary files /dev/null and b/src/backend/signaling_server/src/main/java/com/jootalkpia/.DS_Store differ
diff --git a/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/.DS_Store b/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/.DS_Store
new file mode 100644
index 00000000..042f4b35
Binary files /dev/null and b/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/.DS_Store differ
diff --git a/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/SignalingServerApplication.java b/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/SignalingServerApplication.java
new file mode 100644
index 00000000..a9218e9c
--- /dev/null
+++ b/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/SignalingServerApplication.java
@@ -0,0 +1,13 @@
+package com.jootalkpia.signaling_server;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class SignalingServerApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(SignalingServerApplication.class, args);
+    }
+
+}
diff --git a/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/config/KurentoClientConfig.java b/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/config/KurentoClientConfig.java
new file mode 100644
index 00000000..9fd46434
--- /dev/null
+++ b/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/config/KurentoClientConfig.java
@@ -0,0 +1,21 @@
+package com.jootalkpia.signaling_server.config;
+
+import org.kurento.client.KurentoClient;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import lombok.extern.slf4j.Slf4j;
+
+@Slf4j
+@Configuration
+public class KurentoClientConfig {
+
+    @Value("${kurento.ws.url}")
+    private String kurentoWsUrl;
+
+    @Bean
+    public KurentoClient kurentoClient() {
+        log.info("Initializing KurentoClient with URL: {}", kurentoWsUrl);
+        return KurentoClient.create(kurentoWsUrl);
+    }
+}
diff --git a/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/config/WebRtcConfig.java b/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/config/WebRtcConfig.java
new file mode 100644
index 00000000..0c5426ae
--- /dev/null
+++ b/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/config/WebRtcConfig.java
@@ -0,0 +1,26 @@
+package com.jootalkpia.signaling_server.config;
+
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.kurento.client.KurentoClient;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.socket.config.annotation.EnableWebSocket;
+import org.springframework.web.socket.config.annotation.WebSocketConfigurer;
+import org.springframework.web.socket.config.annotation.WebSocketHandlerRegistry;
+import com.jootalkpia.signaling_server.rtc.KurentoHandler;
+
+@Configuration
+@EnableWebSocket
+@RequiredArgsConstructor
+@Slf4j
+public class WebRtcConfig implements WebSocketConfigurer {
+
+    private final KurentoHandler kurentoHandler;
+
+    @Override
+    public void registerWebSocketHandlers(WebSocketHandlerRegistry registry) {
+        registry.addHandler(kurentoHandler, "/signal").setAllowedOrigins("*");
+    }
+}
diff --git a/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/controller/HuddleController.java b/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/controller/HuddleController.java
new file mode 100644
index 00000000..a5a51882
--- /dev/null
+++ b/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/controller/HuddleController.java
@@ -0,0 +1,30 @@
+//// 허들(화상채팅방) 컨트롤러
+//package com.jootalkpia.signaling_server.controller;
+//
+//import com.jootalkpia.signaling_server.dto.HuddleDto;
+//import com.jootalkpia.signaling_server.service.HuddleService;
+//import lombok.RequiredArgsConstructor;
+//import org.springframework.web.bind.annotation.*;
+//
+//@RestController
+//@RequestMapping("/api/huddle")
+//@RequiredArgsConstructor
+//public class HuddleController {
+//
+//    private final HuddleService huddleService;
+//
+//    @PostMapping("/create")
+//    public HuddleDto createHuddle(@RequestParam String channelId, @RequestParam String userId) {
+//        return huddleService.createHuddle(channelId, userId);
+//    }
+//
+//    @PostMapping("/join/{huddleId}")
+//    public HuddleDto joinHuddle(@PathVariable String huddleId, @RequestParam String userId) {
+//        return huddleService.joinHuddle(huddleId, userId);
+//    }
+//
+//    @GetMapping("/status/{channelId}")
+//    public HuddleDto getHuddleByChannel(@PathVariable String channelId) {
+//        return huddleService.getHuddleByChannel(channelId);
+//    }
+//}
\ No newline at end of file
diff --git a/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/controller/WebRtcController.java b/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/controller/WebRtcController.java
new file mode 100644
index 00000000..ca1899d6
--- /dev/null
+++ b/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/controller/WebRtcController.java
@@ -0,0 +1,45 @@
+//package com.jootalkpia.signaling_server.controller;
+//
+//import com.jootalkpia.signaling_server.dto.WebRtcSignalDto;
+//import com.jootalkpia.signaling_server.service.UserSessionService;
+//import com.jootalkpia.signaling_server.service.KurentoManager;
+//import org.kurento.client.MediaPipeline;
+//import org.kurento.client.WebRtcEndpoint;
+//import org.springframework.web.bind.annotation.*;
+//
+//import java.util.HashMap;
+//import java.util.Map;
+//
+//@RestController
+//@RequestMapping("/api/webrtc")
+//public class WebRtcController {
+//
+//    private final UserSessionService userSessionService;
+//    private final KurentoManager kurentoManager;
+//    private final Map<String, MediaPipeline> pipelines = new HashMap<>();
+//
+//    public WebRtcController(UserSessionService userSessionService, KurentoManager kurentoManager) {
+//        this.userSessionService = userSessionService;
+//        this.kurentoManager = kurentoManager;
+//    }
+//
+//    @PostMapping("/offer")
+//    public WebRtcSignalDto handleOffer(@RequestBody WebRtcSignalDto signalDto) {
+//        String userId = signalDto.getId();
+//        MediaPipeline pipeline = pipelines.computeIfAbsent(userId, k -> kurentoManager.createPipeline());
+//        WebRtcEndpoint webRtcEndpoint = new WebRtcEndpoint.Builder(pipeline).build();
+//
+//        String sdpAnswer = webRtcEndpoint.processOffer(signalDto.getSdpOffer());
+//        webRtcEndpoint.gatherCandidates();
+//
+//        return new WebRtcSignalDto(userId, signalDto.getSdpOffer(), sdpAnswer, null);
+//    }
+//
+//    @PostMapping("/ice")
+//    public void handleIceCandidate(@RequestBody WebRtcSignalDto signalDto) {
+//        String userId = signalDto.getId();
+//        userSessionService.getSession(userId).getWebRtcEndpoint().addIceCandidate(
+//                new org.kurento.client.IceCandidate(signalDto.getCandidate(), "", 0)
+//        );
+//    }
+//}
diff --git a/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/dto/HuddleDto.java b/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/dto/HuddleDto.java
new file mode 100644
index 00000000..2fc35418
--- /dev/null
+++ b/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/dto/HuddleDto.java
@@ -0,0 +1,20 @@
+//package com.jootalkpia.signaling_server.dto;
+//
+//import java.util.HashSet;
+//import lombok.AllArgsConstructor;
+//import lombok.Data;
+//import lombok.NoArgsConstructor;
+//import java.time.LocalDateTime;
+//import java.util.Set;
+//
+//@Data
+//@NoArgsConstructor
+//@AllArgsConstructor
+//public class HuddleDto {
+//    private String huddleId;
+//    private Long channelId;
+//    private Long createdByUserId;
+//    private LocalDateTime createdAt;
+//    private LocalDateTime updatedAt;
+//    private Set<Long> participants;
+//}
diff --git a/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/dto/WebRtcSignalDto.java b/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/dto/WebRtcSignalDto.java
new file mode 100644
index 00000000..ec2a4879
--- /dev/null
+++ b/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/dto/WebRtcSignalDto.java
@@ -0,0 +1,15 @@
+//package com.jootalkpia.signaling_server.dto;
+//
+//import lombok.AllArgsConstructor;
+//import lombok.Data;
+//import lombok.NoArgsConstructor;
+//
+//@Data
+//@NoArgsConstructor
+//@AllArgsConstructor
+//public class WebRtcSignalDto {
+//    private String id;
+//    private String sdpOffer;
+//    private String sdpAnswer;
+//    private String candidate;
+//}
diff --git a/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/model/Huddle.java b/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/model/Huddle.java
new file mode 100644
index 00000000..91c9d3ac
--- /dev/null
+++ b/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/model/Huddle.java
@@ -0,0 +1,24 @@
+package com.jootalkpia.signaling_server.model;
+
+import java.time.LocalDateTime;
+import java.util.Collections;
+import java.util.Set;
+
+public record Huddle(
+        String huddleId,
+        Long channelId,
+        Long createdByUserId,
+        LocalDateTime createdAt,
+        LocalDateTime updatedAt,
+        Set<Long> participants
+) {
+    public Huddle {
+        if (participants == null) {
+            participants = Collections.emptySet();
+        }
+    }
+
+    public Huddle updateParticipants(Set<Long> newParticipants) {
+        return new Huddle(this.huddleId, this.channelId, this.createdByUserId, this.createdAt, LocalDateTime.now(), newParticipants);
+    }
+}
diff --git a/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/repository/HuddleCacheRepository.java b/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/repository/HuddleCacheRepository.java
new file mode 100644
index 00000000..d984d6c7
--- /dev/null
+++ b/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/repository/HuddleCacheRepository.java
@@ -0,0 +1,33 @@
+package com.jootalkpia.signaling_server.repository;
+
+import com.jootalkpia.signaling_server.model.Huddle;
+import org.springframework.stereotype.Repository;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+@Repository
+public class HuddleCacheRepository {
+    private final Map<String, Huddle> huddlesById = new ConcurrentHashMap<>();
+    private final Map<Long, String> channelToHuddleMap = new ConcurrentHashMap<>();
+
+    public void saveHuddle(Huddle huddle) {
+        huddlesById.put(huddle.huddleId(), huddle);
+        channelToHuddleMap.put(huddle.channelId(), huddle.huddleId());
+    }
+
+    public Huddle getHuddleById(String huddleId) {
+        return huddlesById.get(huddleId);
+    }
+
+    public Huddle getHuddleByChannel(Long channelId) {
+        String huddleId = channelToHuddleMap.get(channelId);
+        return huddleId != null ? huddlesById.get(huddleId) : null;
+    }
+
+    public void deleteHuddle(String huddleId) {
+        Huddle huddle = huddlesById.remove(huddleId);
+        if (huddle != null) {
+            channelToHuddleMap.remove(huddle.channelId());
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/rtc/KurentoHandler.java b/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/rtc/KurentoHandler.java
new file mode 100644
index 00000000..b6e71277
--- /dev/null
+++ b/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/rtc/KurentoHandler.java
@@ -0,0 +1,200 @@
+package com.jootalkpia.signaling_server.rtc;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.google.gson.ToNumberPolicy;
+import com.jootalkpia.signaling_server.model.Huddle;
+import com.jootalkpia.signaling_server.service.HuddleService;
+import com.jootalkpia.signaling_server.service.KurentoManager;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.kurento.client.IceCandidate;
+import org.kurento.client.WebRtcEndpoint;
+import org.springframework.stereotype.Component;
+import org.springframework.web.socket.*;
+import org.springframework.web.socket.handler.TextWebSocketHandler;
+
+import java.io.IOException;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+@Slf4j
+@Component
+@RequiredArgsConstructor
+public class KurentoHandler extends TextWebSocketHandler {
+
+    private final Map<Long, KurentoUserSession> userSessions = new ConcurrentHashMap<>();
+    private final Gson gson = new GsonBuilder().setObjectToNumberStrategy(ToNumberPolicy.LONG_OR_DOUBLE).create();
+    private final HuddleService huddleService;
+    private final KurentoManager kurentoManager;
+
+    @Override
+    public void handleTextMessage(WebSocketSession session, TextMessage message) throws IOException {
+        Map<String, Object> json = gson.fromJson(message.getPayload(), Map.class);
+        String id = (String) json.get("id");
+
+        switch (id) {
+            case "createRoom" -> handleCreateRoom(session, json);
+            case "joinRoom" -> handleJoinRoom(session, json);
+            case "leaveRoom" -> handleLeaveRoom(session, json);
+            case "offer" -> handleOffer(session, json);
+            case "iceCandidate" -> handleIceCandidate(session, json);
+            default -> log.warn("Unknown message type received: {}", id);
+        }
+    }
+
+    private Long getLongValueFromJson(Map<String, Object> json, String key) {
+        Object value = json.get(key);
+        if (value == null) {
+            log.error("Missing required parameter: {}", key);
+            throw new IllegalArgumentException("Missing required parameter: " + key);
+        }
+        return (value instanceof Number) ? ((Number) value).longValue() : Long.parseLong(value.toString());
+    }
+
+    // 허들 생성
+    private void handleCreateRoom(WebSocketSession session, Map<String, Object> json) throws IOException {
+        try {
+            Long channelId = getLongValueFromJson(json, "channelId");
+            Long userId = getLongValueFromJson(json, "userId");
+
+            // 허들 생성, 저장
+            Huddle newHuddle = huddleService.createHuddle(channelId, userId);
+            kurentoManager.createRoom(newHuddle.huddleId(), channelId);
+
+            // 자동으로 허들 입장도 처리
+            Map<String, Object> joinJson = Map.of(
+                    "id", "joinRoom",
+                    "huddleId", newHuddle.huddleId(),
+                    "userId", userId,
+                    "channelId", channelId
+            );
+            handleJoinRoom(session, joinJson);
+
+            session.sendMessage(new TextMessage(gson.toJson(Map.of("id", "roomCreated", "huddleId", newHuddle.huddleId()))));
+        } catch (Exception e) {
+            log.error("Error creating room", e);
+            session.sendMessage(new TextMessage(gson.toJson(Map.of("id", "error", "message", "Failed to create room"))));
+        }
+    }
+
+    // 허들 입장
+    private void handleJoinRoom(WebSocketSession session, Map<String, Object> json) throws IOException {
+        try {
+            Long channelId = getLongValueFromJson(json, "channelId");
+            Long userId = getLongValueFromJson(json, "userId");
+            String huddleId = (String) json.get("huddleId");
+
+            huddleService.joinHuddle(huddleId, userId, channelId);
+            WebRtcEndpoint webRtcEndpoint = kurentoManager.addParticipantToRoom(huddleId, userId, channelId);
+            userSessions.put(userId, new KurentoUserSession(userId, huddleId, session, webRtcEndpoint));
+
+            session.sendMessage(new TextMessage(gson.toJson(Map.of("id", "joinedRoom", "huddleId", huddleId))));
+        } catch (Exception e) {
+            log.error("Error joining room", e);
+            session.sendMessage(new TextMessage(gson.toJson(Map.of("id", "error", "message", "Failed to join room"))));
+        }
+    }
+
+    // 허들 나감
+    private void handleLeaveRoom(WebSocketSession session, Map<String, Object> json) throws IOException {
+        try {
+            Long channelId = getLongValueFromJson(json, "channelId");
+            Long userId = getLongValueFromJson(json, "userId");
+            String huddleId = (String) json.get("huddleId");
+
+            huddleService.exitHuddle(huddleId, userId, channelId);
+            KurentoUserSession userSession = userSessions.remove(userId);
+
+            if (userSession == null) {
+                log.warn("User session not found for userId: {}", userId);
+                return;
+            }
+
+            kurentoManager.removeParticipantFromRoom(huddleId, userId, channelId);
+            session.sendMessage(new TextMessage(gson.toJson(Map.of("id", "leftRoom", "huddleId", huddleId))));
+        } catch (Exception e) {
+            log.error("Error leaving room", e);
+        }
+    }
+
+    // SDP Offer 처리
+    private void handleOffer(WebSocketSession session, Map<String, Object> json) throws IOException {
+        try {
+            Long userId = getLongValueFromJson(json, "userId");
+            String sdpOffer = (String) json.get("sdpOffer");
+
+            KurentoUserSession kUserSession = userSessions.get(userId);
+            if (kUserSession == null) {
+                log.warn("User session not found for userId: {}", userId);
+                return;
+            }
+
+            WebRtcEndpoint webRtcEndpoint = kUserSession.getWebRtcEndpoint();
+
+            // ICE Candidate 이벤트 리스너 추가 (null 값 검사)
+            webRtcEndpoint.addIceCandidateFoundListener(event -> {
+                IceCandidate candidate = event.getCandidate();
+                if (candidate.getSdpMid() == null || candidate.getSdpMLineIndex() < 0) {
+                    log.warn("Invalid ICE Candidate received from Kurento: {}", candidate);
+                    return;  // 잘못된 데이터는 전송하지 않음
+                }
+                sendIceCandidate(session, candidate);
+            });
+
+            String sdpAnswer = webRtcEndpoint.processOffer(sdpOffer);
+            webRtcEndpoint.gatherCandidates();
+            session.sendMessage(new TextMessage(gson.toJson(Map.of("id", "answer", "sdpAnswer", sdpAnswer))));
+        } catch (Exception e) {
+            log.error("Error handling offer", e);
+        }
+    }
+
+    // ICE Candidate 처리
+    private void handleIceCandidate(WebSocketSession session, Map<String, Object> json) {
+        try {
+            Long userId = getLongValueFromJson(json, "userId");
+            String candidate = (String) json.get("candidate");
+
+            KurentoUserSession userSession = userSessions.get(userId);
+            if (userSession != null) {
+                userSession.getWebRtcEndpoint().addIceCandidate(new IceCandidate(candidate, "", 0));
+            }
+        } catch (Exception e) {
+            log.error("Error handling ICE candidate", e);
+        }
+    }
+
+    // ICE Candidate 전송 공통 메서드
+    private final Object webSocketLock = new Object(); // 동기화용 Lock 객체
+
+    private void sendIceCandidate(WebSocketSession session, IceCandidate candidate) {
+        synchronized (webSocketLock) { // 동기화 블록 사용
+            try {
+                // 웹소켓이 닫혀 있으면 전송 안 하도록 처리
+                if (!session.isOpen()) {
+                    log.warn("WebSocket session is closed. Cannot send ICE candidate.");
+                    return;
+                }
+
+                // ICE Candidate JSON 변환
+                Map<String, Object> candidateJson = Map.of(
+                        "id", "iceCandidate",
+                        "candidate", Map.of(
+                                "candidate", candidate.getCandidate(),
+                                "sdpMid", candidate.getSdpMid(),
+                                "sdpMLineIndex", candidate.getSdpMLineIndex()
+                        )
+                );
+
+                session.sendMessage(new TextMessage(gson.toJson(candidateJson))); // 동기화된 WebSocket 메시지 전송
+                log.info("Sent ICE candidate: {}", candidateJson);
+
+            } catch (IllegalStateException e) {
+                log.error("Cannot send ICE candidate. WebSocket is in an invalid state: {}", e.getMessage());
+            } catch (IOException e) {
+                log.error("Failed to send ICE candidate", e);
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/rtc/KurentoRoom.java b/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/rtc/KurentoRoom.java
new file mode 100644
index 00000000..7632cad0
--- /dev/null
+++ b/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/rtc/KurentoRoom.java
@@ -0,0 +1,51 @@
+package com.jootalkpia.signaling_server.rtc;
+
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+import org.kurento.client.MediaPipeline;
+import org.kurento.client.WebRtcEndpoint;
+
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+@RequiredArgsConstructor
+@Getter
+public class KurentoRoom {
+    private final String huddleId;
+    private final MediaPipeline pipeline;
+    private final Map<Long, WebRtcEndpoint> participants = new ConcurrentHashMap<>();
+
+    // 참가자가 이미 존재하는지 확인! ❗️❗️❗️❗️❗️❗️❗️❗️❗️❗️❗️❗️❗️❗️❗️❗️❗️❗️❗️❗️❗️❗️ 다 넣기
+    public boolean hasParticipant(String userId) {
+        return participants.containsKey(userId);
+    }
+
+    // 이미 있는 WebRtcEndpoint 반환 or 새로운 WebRtcEndpoint 생성
+    public WebRtcEndpoint addParticipant(Long userId) {
+        if (participants.containsKey(userId)) {
+            // ❗️❗️❗️❗️❗️❗️❗️❗️❗️❗️❗️❗️❗️❗️❗️❗️❗️❗️❗️❗️❗️❗️
+            return participants.get(userId);
+        }
+
+        WebRtcEndpoint webRtcEndpoint = new WebRtcEndpoint.Builder(pipeline).build();
+        participants.put(userId, webRtcEndpoint);
+        return webRtcEndpoint;
+    }
+
+    // 참가자 제거
+    public void removeParticipant(Long userId) {
+        WebRtcEndpoint endpoint = participants.remove(userId);
+        if (endpoint != null) {
+            endpoint.release();
+        }
+    }
+
+    // 방 닫기 (모든 참가자 해제)
+    public void closeRoom() {
+        for (WebRtcEndpoint endpoint : participants.values()) {
+            endpoint.release();
+        }
+        participants.clear();
+        pipeline.release();
+    }
+}
\ No newline at end of file
diff --git a/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/rtc/KurentoUserSession.java b/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/rtc/KurentoUserSession.java
new file mode 100644
index 00000000..ca2dd558
--- /dev/null
+++ b/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/rtc/KurentoUserSession.java
@@ -0,0 +1,20 @@
+package com.jootalkpia.signaling_server.rtc;
+
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+import org.kurento.client.IceCandidate;
+import org.kurento.client.WebRtcEndpoint;
+import org.springframework.web.socket.WebSocketSession;
+
+@RequiredArgsConstructor
+@Getter
+public class KurentoUserSession {
+    private final Long userId;
+    private final String huddleId;
+    private final WebSocketSession session;
+    private final WebRtcEndpoint webRtcEndpoint;
+
+    public void addIceCandidate(IceCandidate candidate) {
+        webRtcEndpoint.addIceCandidate(candidate);
+    }
+}
diff --git a/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/service/HuddleService.java b/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/service/HuddleService.java
new file mode 100644
index 00000000..83d9e3e6
--- /dev/null
+++ b/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/service/HuddleService.java
@@ -0,0 +1,76 @@
+package com.jootalkpia.signaling_server.service;
+
+import com.jootalkpia.signaling_server.model.Huddle;
+import com.jootalkpia.signaling_server.repository.HuddleCacheRepository;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import java.time.LocalDateTime;
+import java.util.HashSet;
+import java.util.Set;
+
+@Service
+@RequiredArgsConstructor
+public class HuddleService {
+
+    private final HuddleCacheRepository huddleCacheRepository;
+
+    public Huddle createHuddle(Long channelId, Long userId) {
+        if (huddleCacheRepository.getHuddleByChannel(channelId) != null) {
+            throw new IllegalStateException("이미 해당 채널에 허들이 존재합니다.");
+        }
+
+        Set<Long> initialParticipants = new HashSet<>();
+//        initialParticipants.add(userId);
+
+        Huddle huddle = new Huddle(
+                "huddle-" + System.currentTimeMillis(),
+                channelId,
+                userId,
+                LocalDateTime.now(),
+                LocalDateTime.now(),
+                initialParticipants
+        );
+
+        huddleCacheRepository.saveHuddle(huddle);
+        return huddle;
+    }
+
+    public Huddle joinHuddle(String huddleId, Long userId, Long channelId) {
+        Huddle huddle = huddleCacheRepository.getHuddleById(huddleId);
+        if (huddle == null) throw new IllegalStateException("허들이 존재하지 않습니다.");
+
+        Huddle updatedHuddle = new Huddle(
+                huddle.huddleId(),
+                huddle.channelId(),
+                huddle.createdByUserId(),
+                huddle.createdAt(),
+                LocalDateTime.now(),
+                addParticipant(huddle.participants(), userId)  // 참가자 추가
+        );
+
+        huddleCacheRepository.saveHuddle(updatedHuddle);
+        return updatedHuddle;
+    }
+
+    // 참가자 추가
+    private Set<Long> addParticipant(Set<Long> participants, Long userId) {
+        Set<Long> updatedParticipants = new HashSet<>(participants);
+        updatedParticipants.add(userId);
+        return updatedParticipants;
+    }
+
+    public void exitHuddle(String huddleId, Long userId, Long channelId) {
+        Huddle huddle = huddleCacheRepository.getHuddleById(huddleId);
+        if (huddle == null) throw new IllegalStateException("허들이 존재하지 않습니다.");
+
+        Set<Long> updatedParticipants = new HashSet<>(huddle.participants());
+        updatedParticipants.remove(userId);
+
+        Huddle updatedHuddle = huddle.updateParticipants(updatedParticipants);
+        huddleCacheRepository.saveHuddle(updatedHuddle);
+    }
+
+    public Huddle getHuddleByChannel(Long channelId) {
+        return huddleCacheRepository.getHuddleByChannel(channelId);
+    }
+}
\ No newline at end of file
diff --git a/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/service/KurentoManager.java b/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/service/KurentoManager.java
new file mode 100644
index 00000000..17daf9a8
--- /dev/null
+++ b/src/backend/signaling_server/src/main/java/com/jootalkpia/signaling_server/service/KurentoManager.java
@@ -0,0 +1,65 @@
+package com.jootalkpia.signaling_server.service;
+
+import com.jootalkpia.signaling_server.rtc.KurentoRoom;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.kurento.client.KurentoClient;
+import org.kurento.client.MediaPipeline;
+import org.kurento.client.WebRtcEndpoint;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.context.annotation.Lazy;
+import org.springframework.stereotype.Service;
+
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+@Service
+@RequiredArgsConstructor
+@Slf4j
+public class KurentoManager {
+
+    private final KurentoClient kurentoClient;
+    private final Map<Long, KurentoRoom> rooms = new ConcurrentHashMap<>();
+
+    // KurentoRoom도 함께 생성
+    public void createRoom(String huddleId, Long channelId) {
+        if (rooms.containsKey(channelId)) {
+            throw new IllegalStateException("이미 존재하는 KurentoRoom입니다.");
+        }
+
+        MediaPipeline pipeline = kurentoClient.createMediaPipeline();
+        KurentoRoom room = new KurentoRoom(huddleId, pipeline);
+        rooms.put(channelId, room);
+    }
+
+    public KurentoRoom getRoom(String huddleId, Long channelId) {
+        return rooms.get(channelId);
+    }
+
+    public void removeRoom(String huddleId, Long channelId) {
+        KurentoRoom room = rooms.remove(channelId);
+        if (room != null) {
+            room.closeRoom();
+        }
+    }
+
+    public WebRtcEndpoint addParticipantToRoom(String huddleId, Long userId, Long channelId) {
+        KurentoRoom room = rooms.get(channelId);
+        if (room == null) {
+            throw new IllegalStateException("존재하지 않는 KurentoRoom입니다.");
+        }
+
+        return room.addParticipant(userId);
+    }
+
+    public void removeParticipantFromRoom(String huddleId, Long userId, Long channelId) {
+        if (huddleId == null || userId == null) {
+            log.error("removeParticipantFromRoom() - roomId or userId is null");
+            return;
+        }
+        KurentoRoom room = rooms.get(channelId);
+        if (room != null) {
+            room.removeParticipant(userId);
+        }
+    }
+}
diff --git a/src/backend/signaling_server/src/main/resources/application.yml b/src/backend/signaling_server/src/main/resources/application.yml
new file mode 100644
index 00000000..937aa85c
--- /dev/null
+++ b/src/backend/signaling_server/src/main/resources/application.yml
@@ -0,0 +1,6 @@
+server:
+  port: 8080
+
+kurento:
+  ws:
+    url: "ws://192.168.0.14:8888/kurento"
diff --git a/src/backend/signaling_server/src/test/java/com/jootalkpia/signaling_server/SignalingServerApplicationTests.java b/src/backend/signaling_server/src/test/java/com/jootalkpia/signaling_server/SignalingServerApplicationTests.java
new file mode 100644
index 00000000..c3fb9ba5
--- /dev/null
+++ b/src/backend/signaling_server/src/test/java/com/jootalkpia/signaling_server/SignalingServerApplicationTests.java
@@ -0,0 +1,13 @@
+package com.jootalkpia.signaling_server;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class SignalingServerApplicationTests {
+
+    @Test
+    void contextLoads() {
+    }
+
+}
diff --git a/src/backend/workspace_server/.DS_Store b/src/backend/workspace_server/.DS_Store
new file mode 100644
index 00000000..d6aff34a
Binary files /dev/null and b/src/backend/workspace_server/.DS_Store differ
diff --git a/src/backend/workspace_server/src/.DS_Store b/src/backend/workspace_server/src/.DS_Store
new file mode 100644
index 00000000..3ec1d1ed
Binary files /dev/null and b/src/backend/workspace_server/src/.DS_Store differ