diff --git a/.gitignore b/.gitignore
index 26f1442e..61c7b65c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,4 @@
 /node_modules
 /build
 /npm-debug.log
-/src/backend/public
 .DS_Store
-/pm2.config.js
diff --git a/LICENSE b/LICENSE
index 66e666d7..27f3bc1e 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2018 Jinseo Jason Park
+Copyright (c) 2019 Jinseo Jason Park
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/app/backend.js b/app/backend.js
deleted file mode 100644
index ebec15a8..00000000
--- a/app/backend.js
+++ /dev/null
@@ -1,42 +0,0 @@
-const {
-  __DEV__,
-  backendBuildPath,
-} = require('../environment');
-
-if (__DEV__) {
-  const webpack = require('webpack');
-  const webpackConfig = require('../webpack.backend.config.js');
-  const compiler = webpack(webpackConfig);
-
-  let backend = null;
-  let lastHash = null;
-  compiler.watch({
-    watchOptions: {
-      ignored: /public/,
-    },
-  }, (err, stats) => {
-    if (err) {
-      lastHash = null;
-      compiler.purgeInputFileSystem();
-      console.error(err);
-    } else if (stats.hash !== lastHash) {
-      lastHash = stats.hash;
-      console.info(stats.toString({
-        cached: false,
-        colors: true,
-      }));
-
-      delete require.cache[require.resolve(backendBuildPath)];
-      backend = require(backendBuildPath).default;
-    }
-  });
-
-  const backendWrapper = (req, res, next) => backend(req, res, next);
-  backendWrapper.getHierarchy = () => backend.hierarchy;
-  module.exports = backendWrapper;
-} else {
-  const backend = require(backendBuildPath).default;
-  const backendWrapper = (req, res, next) => backend(req, res, next);
-  backendWrapper.getHierarchy = () => backend.hierarchy;
-  module.exports = backendWrapper;
-}
diff --git a/app/frontend.js b/app/frontend.js
deleted file mode 100644
index d54c3fb5..00000000
--- a/app/frontend.js
+++ /dev/null
@@ -1,78 +0,0 @@
-const express = require('express');
-const path = require('path');
-const fs = require('fs');
-const url = require('url');
-const packageJson = require('../package');
-
-const {
-  __DEV__,
-  frontendSrcPath,
-  frontendBuildPath,
-} = require('../environment');
-
-const app = express();
-
-if (__DEV__) {
-  const webpack = require('webpack');
-  const webpackDev = require('webpack-dev-middleware');
-  const webpackHot = require('webpack-hot-middleware');
-  const webpackConfig = require('../webpack.frontend.config.js');
-  const compiler = webpack(webpackConfig);
-  app.use(express.static(path.resolve(frontendSrcPath, 'static')));
-  app.use(webpackDev(compiler, {
-    stats: {
-      cached: false,
-      colors: true,
-    },
-    serverSideRender: true,
-    index: false,
-  }));
-  app.use(webpackHot(compiler));
-  app.use((req, res, next) => {
-    const { fs } = res.locals;
-    const outputPath = res.locals.webpackStats.toJson().outputPath;
-    const filePath = path.resolve(outputPath, 'index.html');
-    fs.readFile(filePath, 'utf8', (err, data) => {
-      if (err) return next(err);
-      res.indexFile = data;
-      next();
-    });
-  });
-} else {
-  app.use(express.static(frontendBuildPath, { index: false }));
-  app.use((req, res, next) => {
-    const filePath = path.resolve(frontendBuildPath, 'index.html');
-    fs.readFile(filePath, 'utf8', (err, data) => {
-      if (err) return next(err);
-      res.indexFile = data;
-      next();
-    });
-  });
-}
-
-app.use((req, res) => {
-  const backend = require('./backend');
-  const hierarchy = backend.getHierarchy();
-
-  const [, categoryKey, algorithmKey] = url.parse(req.originalUrl).pathname.split('/');
-  let { title, description } = packageJson;
-  let algorithm = undefined;
-  if (categoryKey && categoryKey !== 'scratch-paper') {
-    algorithm = hierarchy.find(categoryKey, algorithmKey) || null;
-    if (algorithm) {
-      title = [algorithm.categoryName, algorithm.algorithmName].join(' - ');
-      description = algorithm.description;
-    } else {
-      res.status(404);
-    }
-  }
-
-  const indexFile = res.indexFile
-    .replace(/\$TITLE/g, title)
-    .replace(/\$DESCRIPTION/g, description)
-    .replace(/\$ALGORITHM/g, algorithm === undefined ? 'undefined' :
-      JSON.stringify(algorithm).replace(/</g, '\\u003c'));
-  res.send(indexFile);
-});
-
-module.exports = app;
diff --git a/app/index.js b/app/index.js
deleted file mode 100644
index 2cd4d100..00000000
--- a/app/index.js
+++ /dev/null
@@ -1,30 +0,0 @@
-const path = require('path');
-const express = require('express');
-const compression = require('compression');
-const app = express();
-
-const frontend = require('./frontend');
-const backend = require('./backend');
-
-const {
-  apiEndpoint,
-  credentials,
-} = require('../environment');
-
-app.use(compression());
-app.use((req, res, next) => {
-  if (req.hostname === 'algo-visualizer.jasonpark.me') {
-    res.redirect(301, 'https://algorithm-visualizer.org/');
-  } else if (credentials && !req.secure) {
-    res.redirect(301, `https://${req.hostname}${req.url}`);
-  } else {
-    next();
-  }
-});
-app.get('/robots.txt', (req, res) => {
-  res.sendFile(path.resolve(__dirname, '..', 'robots.txt'));
-});
-app.use(apiEndpoint, backend);
-app.use(frontend);
-
-module.exports = app;
diff --git a/bin/pull b/bin/pull
deleted file mode 100755
index e0acb4d3..00000000
--- a/bin/pull
+++ /dev/null
@@ -1,7 +0,0 @@
-#!/usr/bin/env bash
-
-git fetch &&
-! git diff-index --quiet origin/master -- ':!package-lock.json' &&
-git reset --hard origin/master &&
-npm install &&
-npm run build
diff --git a/bin/www b/bin/www
deleted file mode 100755
index 19bd7639..00000000
--- a/bin/www
+++ /dev/null
@@ -1,21 +0,0 @@
-#!/usr/bin/env node
-
-const http = require('http');
-const https = require('https');
-
-const app = require('../app');
-const {
-  httpPort,
-  httpsPort,
-  credentials,
-} = require('../environment');
-
-const httpServer = http.createServer(app);
-httpServer.listen(httpPort);
-console.info(`http: listening on port ${httpPort}`);
-
-if (credentials) {
-  const httpsServer = https.createServer(credentials, app);
-  httpsServer.listen(httpsPort);
-  console.info(`https: listening on port ${httpsPort}`);
-}
diff --git a/package.json b/package.json
index 1ff89109..775ce6bb 100644
--- a/package.json
+++ b/package.json
@@ -23,11 +23,6 @@
     "visualization",
     "animation"
   ],
-  "author": {
-    "name": "Jinseo Jason Park",
-    "email": "parkjs814@gmail.com",
-    "url": "https://jasonpark.me/"
-  },
   "license": "MIT",
   "dependencies": {
     "axios": "latest",
diff --git a/src/frontend/apis/index.js b/src/apis/index.js
similarity index 100%
rename from src/frontend/apis/index.js
rename to src/apis/index.js
diff --git a/src/backend/apis/index.js b/src/backend/apis/index.js
deleted file mode 100644
index 5aedb723..00000000
--- a/src/backend/apis/index.js
+++ /dev/null
@@ -1,82 +0,0 @@
-import Promise from 'bluebird';
-import axios from 'axios';
-import fs from 'fs';
-import { githubClientId, githubClientSecret } from '/environment';
-
-const instance = axios.create();
-
-instance.interceptors.request.use(request => {
-  request.params = { client_id: githubClientId, client_secret: githubClientSecret, ...request.params };
-  return request;
-});
-
-instance.interceptors.response.use(response => {
-  return response.data;
-}, error => {
-  return Promise.reject(error.response.data);
-});
-
-const request = (url, process) => {
-  const tokens = url.split('/');
-  const baseURL = /^https?:\/\//i.test(url) ? '' : 'https://api.github.com';
-  return (...args) => {
-    return new Promise((resolve, reject) => {
-      const mappedURL = baseURL + tokens.map((token, i) => token.startsWith(':') ? args.shift() : token).join('/');
-      return resolve(process(mappedURL, args));
-    });
-  };
-};
-
-const GET = URL => {
-  return request(URL, (mappedURL, args) => {
-    const [params] = args;
-    return instance.get(mappedURL, { params });
-  });
-};
-
-const DELETE = URL => {
-  return request(URL, (mappedURL, args) => {
-    const [params] = args;
-    return instance.delete(mappedURL, { params });
-  });
-};
-
-const POST = URL => {
-  return request(URL, (mappedURL, args) => {
-    const [body, params] = args;
-    return instance.post(mappedURL, body, { params });
-  });
-};
-
-const PUT = URL => {
-  return request(URL, (mappedURL, args) => {
-    const [body, params] = args;
-    return instance.put(mappedURL, body, { params });
-  });
-};
-
-const PATCH = URL => {
-  return request(URL, (mappedURL, args) => {
-    const [body, params] = args;
-    return instance.patch(mappedURL, body, { params });
-  });
-};
-
-const GitHubApi = {
-  listCommits: GET('/repos/:owner/:repo/commits'),
-  getAccessToken: code => instance.post('https://github.com/login/oauth/access_token', { code }, { headers: { Accept: 'application/json' } }),
-  getLatestRelease: GET('/repos/:owner/:repo/releases/latest'),
-  download: (url, path) => instance({
-    method: 'get',
-    url,
-    responseType: 'stream',
-  }).then(data => new Promise((resolve, reject) => {
-    data.pipe(fs.createWriteStream(path));
-    data.on('end', resolve);
-    data.on('error', reject);
-  })),
-};
-
-export {
-  GitHubApi,
-};
\ No newline at end of file
diff --git a/src/backend/common/config.js b/src/backend/common/config.js
deleted file mode 100644
index 6e06a994..00000000
--- a/src/backend/common/config.js
+++ /dev/null
@@ -1,7 +0,0 @@
-const memoryLimit = 256; // in megabytes
-const timeLimit = 5000; // in milliseconds
-
-export {
-  memoryLimit,
-  timeLimit,
-};
diff --git a/src/backend/common/error.js b/src/backend/common/error.js
deleted file mode 100644
index c0894706..00000000
--- a/src/backend/common/error.js
+++ /dev/null
@@ -1,18 +0,0 @@
-class ClientError extends Error {
-}
-
-class NotFoundError extends ClientError {
-}
-
-class ForbiddenError extends ClientError {
-}
-
-class UnauthorizedError extends ClientError {
-}
-
-export {
-  ClientError,
-  NotFoundError,
-  ForbiddenError,
-  UnauthorizedError,
-};
diff --git a/src/backend/common/hierarchy.js b/src/backend/common/hierarchy.js
deleted file mode 100644
index 61635f1e..00000000
--- a/src/backend/common/hierarchy.js
+++ /dev/null
@@ -1,7 +0,0 @@
-import { Hierarchy } from '/models';
-import path from 'path';
-
-const repoPath = path.resolve(__dirname, '..', 'public', 'algorithms');
-const hierarchy = new Hierarchy(repoPath);
-
-export default hierarchy;
diff --git a/src/backend/common/util.js b/src/backend/common/util.js
deleted file mode 100644
index 8c9ddfa0..00000000
--- a/src/backend/common/util.js
+++ /dev/null
@@ -1,52 +0,0 @@
-import Promise from 'bluebird';
-import axios from 'axios';
-import child_process from 'child_process';
-import path from 'path';
-import fs from 'fs-extra';
-import removeMarkdown from 'remove-markdown';
-
-const execute = (command, { stdout = process.stdout, stderr = process.stderr, ...options } = {}) => new Promise((resolve, reject) => {
-  const child = child_process.exec(command, options, (error, stdout, stderr) => {
-    if (error) return reject(error.code ? new Error(stderr) : error);
-    resolve(stdout);
-  });
-  if (stdout) child.stdout.pipe(stdout);
-  if (stderr) child.stderr.pipe(stderr);
-});
-
-const createKey = name => name.toLowerCase().trim().replace(/[^\w \-]/g, '').replace(/ /g, '-');
-
-const isDirectory = dirPath => fs.lstatSync(dirPath).isDirectory();
-
-const listFiles = dirPath => fs.readdirSync(dirPath).filter(fileName => !fileName.startsWith('.'));
-
-const listDirectories = dirPath => listFiles(dirPath).filter(fileName => isDirectory(path.resolve(dirPath, fileName)));
-
-const getDescription = files => {
-  const readmeFile = files.find(file => file.name === 'README.md');
-  if (!readmeFile) return '';
-  const lines = readmeFile.content.split('\n');
-  lines.shift();
-  while (lines.length && !lines[0].trim()) lines.shift();
-  let descriptionLines = [];
-  while (lines.length && lines[0].trim()) descriptionLines.push(lines.shift());
-  return removeMarkdown(descriptionLines.join(' '));
-};
-
-const download = (url, localPath) => axios({ url, method: 'GET', responseType: 'stream' })
-  .then(response => new Promise((resolve, reject) => {
-    const writer = fs.createWriteStream(localPath);
-    writer.on('finish', resolve);
-    writer.on('error', reject);
-    response.data.pipe(writer);
-  }));
-
-export {
-  execute,
-  createKey,
-  isDirectory,
-  listFiles,
-  listDirectories,
-  getDescription,
-  download,
-};
diff --git a/src/backend/common/webhook.js b/src/backend/common/webhook.js
deleted file mode 100644
index 5f7599ad..00000000
--- a/src/backend/common/webhook.js
+++ /dev/null
@@ -1,6 +0,0 @@
-import GithubWebHook from 'express-github-webhook';
-import { githubWebhookSecret } from '/environment';
-
-const webhook = GithubWebHook({ path: '/', secret: githubWebhookSecret });
-
-export default webhook;
diff --git a/src/backend/controllers/algorithms.js b/src/backend/controllers/algorithms.js
deleted file mode 100644
index 6bac3746..00000000
--- a/src/backend/controllers/algorithms.js
+++ /dev/null
@@ -1,49 +0,0 @@
-import express from 'express';
-import fs from 'fs-extra';
-import { execute } from '/common/util';
-import webhook from '/common/webhook';
-import hierarchy from '/common/hierarchy';
-import { NotFoundError } from '/common/error';
-
-const router = express.Router();
-
-const downloadCategories = () => (
-  fs.pathExistsSync(hierarchy.path) ?
-    execute(`git fetch && git reset --hard origin/master`, { cwd: hierarchy.path }) :
-    execute(`git clone https://github.com/algorithm-visualizer/algorithms.git ${hierarchy.path}`)
-).then(() => hierarchy.refresh());
-
-downloadCategories().catch(console.error);
-
-webhook.on('algorithms', event => {
-  switch (event) {
-    case 'push':
-      downloadCategories().catch(console.error);
-      break;
-  }
-});
-
-router.route('/')
-  .get((req, res, next) => {
-    res.json(hierarchy);
-  });
-
-router.route('/:categoryKey/:algorithmKey')
-  .get((req, res, next) => {
-    const { categoryKey, algorithmKey } = req.params;
-    const algorithm = hierarchy.find(categoryKey, algorithmKey);
-    if (!algorithm) return next(new NotFoundError());
-    res.json({ algorithm });
-  });
-
-router.route('/sitemap.txt')
-  .get((req, res, next) => {
-    const urls = [];
-    hierarchy.iterate((category, algorithm) => {
-      urls.push(`https://algorithm-visualizer.org/${category.key}/${algorithm.key}`);
-    });
-    res.set('Content-Type', 'text/plain');
-    res.send(urls.join('\n'));
-  });
-
-export default router;
diff --git a/src/backend/controllers/auth.js b/src/backend/controllers/auth.js
deleted file mode 100644
index 45e156e7..00000000
--- a/src/backend/controllers/auth.js
+++ /dev/null
@@ -1,32 +0,0 @@
-import express from 'express';
-import { githubClientId } from '/environment';
-import { GitHubApi } from '/apis';
-
-const router = express.Router();
-
-const request = (req, res, next) => {
-  res.redirect(`https://github.com/login/oauth/authorize?client_id=${githubClientId}&scope=user,gist`);
-};
-
-const response = (req, res, next) => {
-  const { code } = req.query;
-
-  GitHubApi.getAccessToken(code).then(({ access_token }) => {
-    res.send(`<script>window.opener.signIn('${access_token}');window.close();</script>`);
-  }).catch(next);
-};
-
-const destroy = (req, res, next) => {
-  res.send(`<script>window.opener.signOut();window.close();</script>`);
-};
-
-router.route('/request')
-  .get(request);
-
-router.route('/response')
-  .get(response);
-
-router.route('/destroy')
-  .get(destroy);
-
-export default router;
diff --git a/src/backend/controllers/index.js b/src/backend/controllers/index.js
deleted file mode 100644
index a971818b..00000000
--- a/src/backend/controllers/index.js
+++ /dev/null
@@ -1,4 +0,0 @@
-export { default as auth } from './auth';
-export { default as algorithms } from './algorithms';
-export { default as tracers } from './tracers';
-export { default as visualizations } from './visualizations';
diff --git a/src/backend/controllers/tracers.js b/src/backend/controllers/tracers.js
deleted file mode 100644
index 04806e49..00000000
--- a/src/backend/controllers/tracers.js
+++ /dev/null
@@ -1,81 +0,0 @@
-import express from 'express';
-import fs from 'fs-extra';
-import Promise from 'bluebird';
-import uuid from 'uuid';
-import path from 'path';
-import { GitHubApi } from '/apis';
-import { execute } from '/common/util';
-import webhook from '/common/webhook';
-import { ImageBuilder, WorkerBuilder } from '/tracers';
-import { memoryLimit, timeLimit } from '/common/config';
-
-const router = express.Router();
-
-const trace = lang => (req, res, next) => {
-  const { code } = req.body;
-  const tempPath = path.resolve(__dirname, '..', 'public', 'codes', uuid.v4());
-  fs.outputFile(path.resolve(tempPath, `Main.${lang}`), code)
-    .then(() => {
-      const builder = builderMap[lang];
-      const containerName = uuid.v4();
-      let killed = false;
-      const timer = setTimeout(() => {
-        execute(`docker kill ${containerName}`).then(() => {
-          killed = true;
-        });
-      }, timeLimit);
-      return execute([
-        'docker run --rm',
-        `--name=${containerName}`,
-        '-w=/usr/visualization',
-        `-v=${tempPath}:/usr/visualization:rw`,
-        `-m=${memoryLimit}m`,
-        '-e ALGORITHM_VISUALIZER=1',
-        builder.imageName,
-      ].join(' '), { stdout: null, stderr: null }).catch(error => {
-        if (killed) throw new Error('Time Limit Exceeded');
-        throw error;
-      }).finally(() => clearTimeout(timer));
-    })
-    .then(() => new Promise((resolve, reject) => {
-      const visualizationPath = path.resolve(tempPath, 'visualization.json');
-      res.sendFile(visualizationPath, err => {
-        if (err) return reject(new Error('Visualization Not Found'));
-        resolve();
-      });
-    }))
-    .catch(next)
-    .finally(() => fs.remove(tempPath));
-};
-
-const builderMap = {
-  js: new WorkerBuilder(),
-  cpp: new ImageBuilder('cpp'),
-  java: new ImageBuilder('java'),
-};
-
-Promise.map(Object.keys(builderMap), lang => {
-  const builder = builderMap[lang];
-  return GitHubApi.getLatestRelease('algorithm-visualizer', `tracers.${lang}`).then(builder.build);
-}).catch(console.error);
-
-webhook.on('release', (repo, data) => {
-  const result = /^tracers\.(\w+)$/.exec(repo);
-  if (result) {
-    const [, lang] = result;
-    const builder = builderMap[lang];
-    builder.build(data.release).catch(console.error);
-  }
-});
-
-Object.keys(builderMap).forEach(lang => {
-  const builder = builderMap[lang];
-  if (builder instanceof ImageBuilder) {
-    router.post(`/${lang}`, trace(lang));
-  } else if (builder instanceof WorkerBuilder) {
-    router.get(`/${lang}`, (req, res) => res.sendFile(builder.tracerPath));
-    router.get(`/${lang}/worker`, (req, res) => res.sendFile(builder.workerPath));
-  }
-});
-
-export default router;
diff --git a/src/backend/controllers/visualizations.js b/src/backend/controllers/visualizations.js
deleted file mode 100644
index 968f78a4..00000000
--- a/src/backend/controllers/visualizations.js
+++ /dev/null
@@ -1,42 +0,0 @@
-import express from 'express';
-import path from 'path';
-import uuid from 'uuid';
-import fs from 'fs-extra';
-import Promise from 'bluebird';
-
-const router = express.Router();
-
-const uploadPath = path.resolve(__dirname, '..', 'public', 'visualizations');
-const getVisualizationPath = visualizationId => path.resolve(uploadPath, `${visualizationId}.json`);
-
-fs.remove(uploadPath).catch(console.error);
-
-const uploadVisualization = (req, res, next) => {
-  const { content } = req.body;
-  const visualizationId = uuid.v4();
-  const tracesPath = getVisualizationPath(visualizationId);
-  const url = `https://algorithm-visualizer.org/scratch-paper/new?visualizationId=${visualizationId}`;
-  fs.outputFile(tracesPath, content)
-    .then(() => res.send(url))
-    .catch(next);
-};
-
-const getVisualization = (req, res, next) => {
-  const { visualizationId } = req.params;
-  const visualizationPath = getVisualizationPath(visualizationId);
-  new Promise((resolve, reject) => {
-    res.sendFile(visualizationPath, err => {
-      if (err) return reject(new Error('Visualization Expired'));
-      resolve();
-    });
-  }).catch(next)
-    .finally(() => fs.remove(visualizationPath));
-};
-
-router.route('/')
-  .post(uploadVisualization);
-
-router.route('/:visualizationId')
-  .get(getVisualization);
-
-export default router;
diff --git a/src/backend/index.js b/src/backend/index.js
deleted file mode 100644
index 3f9df620..00000000
--- a/src/backend/index.js
+++ /dev/null
@@ -1,41 +0,0 @@
-import express from 'express';
-import morgan from 'morgan';
-import cookieParser from 'cookie-parser';
-import bodyParser from 'body-parser';
-import * as controllers from '/controllers';
-import { ClientError, ForbiddenError, NotFoundError, UnauthorizedError } from '/common/error';
-import webhook from '/common/webhook';
-import hierarchy from '/common/hierarchy';
-
-const app = express();
-app.use(morgan('tiny'));
-app.use(cookieParser());
-app.use(bodyParser.json());
-app.use(bodyParser.urlencoded({ extended: true }));
-Object.keys(controllers).forEach(key => app.use(`/${key}`, controllers[key]));
-app.use('/webhook', webhook);
-app.use((req, res, next) => next(new NotFoundError()));
-app.use((err, req, res, next) => {
-  const statusMap = [
-    [UnauthorizedError, 401],
-    [ForbiddenError, 403],
-    [NotFoundError, 404],
-    [ClientError, 400],
-    [Error, 500],
-  ];
-  const [, status] = statusMap.find(([Error]) => err instanceof Error);
-  res.status(status);
-  res.send(err.message);
-  console.error(err);
-});
-app.hierarchy = hierarchy;
-
-webhook.on('algorithm-visualizer', event => {
-  switch (event) {
-    case 'push':
-      process.exit(0);
-      break;
-  }
-});
-
-export default app;
diff --git a/src/backend/models/Algorithm.js b/src/backend/models/Algorithm.js
deleted file mode 100644
index 45dfde29..00000000
--- a/src/backend/models/Algorithm.js
+++ /dev/null
@@ -1,25 +0,0 @@
-import path from 'path';
-import { createKey, getDescription, listFiles } from '/common/util';
-import { File } from '/models';
-
-class Algorithm {
-  constructor(path, name) {
-    this.path = path;
-    this.key = createKey(name);
-    this.name = name;
-    this.refresh();
-  }
-
-  refresh() {
-    this.files = listFiles(this.path)
-      .map(fileName => new File(path.resolve(this.path, fileName), fileName));
-    this.description = getDescription(this.files);
-  }
-
-  toJSON() {
-    const { key, name } = this;
-    return { key, name };
-  }
-}
-
-export default Algorithm;
diff --git a/src/backend/models/Category.js b/src/backend/models/Category.js
deleted file mode 100644
index 03ea980b..00000000
--- a/src/backend/models/Category.js
+++ /dev/null
@@ -1,24 +0,0 @@
-import path from 'path';
-import { createKey, listDirectories } from '/common/util';
-import { Algorithm } from '/models';
-
-class Category {
-  constructor(path, name) {
-    this.path = path;
-    this.key = createKey(name);
-    this.name = name;
-    this.refresh();
-  }
-
-  refresh() {
-    this.algorithms = listDirectories(this.path)
-      .map(algorithmName => new Algorithm(path.resolve(this.path, algorithmName), algorithmName));
-  }
-
-  toJSON() {
-    const { key, name, algorithms } = this;
-    return { key, name, algorithms };
-  }
-}
-
-export default Category;
diff --git a/src/backend/models/File.js b/src/backend/models/File.js
deleted file mode 100644
index 3bb69da7..00000000
--- a/src/backend/models/File.js
+++ /dev/null
@@ -1,21 +0,0 @@
-import fs from 'fs-extra';
-
-class File {
-  constructor(path, name) {
-    this.path = path;
-    this.name = name;
-    this.refresh();
-  }
-
-  refresh() {
-    this.content = fs.readFileSync(this.path, 'utf-8');
-    this.contributors = [];
-  }
-
-  toJSON() {
-    const { name, content, contributors } = this;
-    return { name, content, contributors };
-  }
-}
-
-export default File;
diff --git a/src/backend/models/Hierarchy.js b/src/backend/models/Hierarchy.js
deleted file mode 100644
index 589910e0..00000000
--- a/src/backend/models/Hierarchy.js
+++ /dev/null
@@ -1,84 +0,0 @@
-import Promise from 'bluebird';
-import path from 'path';
-import { execute, listDirectories } from '/common/util';
-import { GitHubApi } from '/apis';
-import { Category } from '/models';
-
-class Hierarchy {
-  constructor(path) {
-    this.path = path;
-    this.refresh();
-  }
-
-  refresh() {
-    this.categories = listDirectories(this.path)
-      .map(categoryName => new Category(path.resolve(this.path, categoryName), categoryName));
-
-    const files = [];
-    this.categories.forEach(category => category.algorithms.forEach(algorithm => files.push(...algorithm.files)));
-    this.cacheCommitAuthors().then(commitAuthors => this.cacheContributors(files, commitAuthors));
-  }
-
-  cacheCommitAuthors(page = 1, commitAuthors = {}) {
-    const per_page = 100;
-    return GitHubApi.listCommits('algorithm-visualizer', 'algorithms', {
-      per_page,
-      page,
-    }).then(commits => {
-      commits.forEach(({ sha, commit, author }) => {
-        if (!author) return;
-        const { login, avatar_url } = author;
-        commitAuthors[sha] = { login, avatar_url };
-      });
-      if (commits.length < per_page) {
-        return commitAuthors;
-      } else {
-        return this.cacheCommitAuthors(page + 1, commitAuthors);
-      }
-    });
-  }
-
-  cacheContributors(files, commitAuthors) {
-    return Promise.each(files, file => {
-      return execute(`git --no-pager log --follow --no-merges --format="%H" "${file.path}"`, {
-        cwd: this.path, stdout: null,
-      }).then(stdout => {
-        const output = stdout.toString().replace(/\n$/, '');
-        const shas = output.split('\n').reverse();
-        const contributors = [];
-        for (const sha of shas) {
-          const author = commitAuthors[sha];
-          if (author && !contributors.find(contributor => contributor.login === author.login)) {
-            contributors.push(author);
-          }
-        }
-        file.contributors = contributors;
-      });
-    });
-  }
-
-  find(categoryKey, algorithmKey) {
-    const category = this.categories.find(category => category.key === categoryKey);
-    if (!category) return;
-    const algorithm = category.algorithms.find(algorithm => algorithm.key === algorithmKey);
-    if (!algorithm) return;
-
-    const categoryName = category.name;
-    const algorithmName = algorithm.name;
-    const files = algorithm.files;
-    const description = algorithm.description;
-
-    return { categoryKey, categoryName, algorithmKey, algorithmName, files, description };
-  }
-
-  iterate(callback) {
-    this.categories.forEach(category => category.algorithms.forEach(algorithm => callback(category, algorithm)));
-  }
-
-  toJSON() {
-    const { categories } = this;
-    return { categories };
-  }
-}
-
-export default Hierarchy;
diff --git a/src/backend/models/index.js b/src/backend/models/index.js
deleted file mode 100644
index 64dea130..00000000
--- a/src/backend/models/index.js
+++ /dev/null
@@ -1,4 +0,0 @@
-export { default as Algorithm } from './Algorithm';
-export { default as Category } from './Category';
-export { default as File } from './File';
-export { default as Hierarchy } from './Hierarchy';
diff --git a/src/backend/tracers/ImageBuilder.js b/src/backend/tracers/ImageBuilder.js
deleted file mode 100644
index e25d7c19..00000000
--- a/src/backend/tracers/ImageBuilder.js
+++ /dev/null
@@ -1,19 +0,0 @@
-import path from 'path';
-import { execute } from '/common/util';
-
-class ImageBuilder {
-  constructor(lang) {
-    this.lang = lang;
-    this.directory = path.resolve(__dirname, lang);
-    this.imageName = `tracer-${this.lang}`;
-
-    this.build = this.build.bind(this);
-  }
-
-  build(release) {
-    const { tag_name } = release;
-    return execute(`docker build -t ${this.imageName} . --build-arg tag_name=${tag_name}`, { cwd: this.directory });
-  }
-}
-
-export default ImageBuilder;
diff --git a/src/backend/tracers/WorkerBuilder.js b/src/backend/tracers/WorkerBuilder.js
deleted file mode 100644
index 07369cd0..00000000
--- a/src/backend/tracers/WorkerBuilder.js
+++ /dev/null
@@ -1,18 +0,0 @@
-import path from 'path';
-import { download } from '/common/util';
-
-class WorkerBuilder {
-  constructor() {
-    this.tracerPath = path.resolve(__dirname, '..', 'public', 'algorithm-visualizer.js');
-    this.workerPath = path.resolve(__dirname, 'js', 'worker.js');
-
-    this.build = this.build.bind(this);
-  }
-
-  build(release) {
-    const { tag_name } = release;
-    return download(`https://github.com/algorithm-visualizer/tracers.js/releases/download/${tag_name}/algorithm-visualizer.js`, this.tracerPath);
-  }
-}
-
-export default WorkerBuilder;
diff --git a/src/backend/tracers/cpp/Dockerfile b/src/backend/tracers/cpp/Dockerfile
deleted file mode 100644
index 03b3d944..00000000
--- a/src/backend/tracers/cpp/Dockerfile
+++ /dev/null
@@ -1,17 +0,0 @@
-FROM rikorose/gcc-cmake
-
-ARG tag_name
-
-RUN curl --create-dirs -o /usr/local/include/nlohmann/json.hpp -L "https://github.com/nlohmann/json/releases/download/v3.1.2/json.hpp" \
- && curl --create-dirs -o /usr/tmp/algorithm-visualizer.tar.gz -L "https://github.com/algorithm-visualizer/tracers.cpp/archive/${tag_name}.tar.gz" \
- && cd /usr/tmp \
- && mkdir algorithm-visualizer \
- && tar xvzf algorithm-visualizer.tar.gz -C algorithm-visualizer --strip-components=1 \
- && cd /usr/tmp/algorithm-visualizer \
- && mkdir build \
- && cd build \
- && cmake .. \
- && make install
-
-CMD g++ Main.cpp -o Main -O2 -std=c++11 -lcurl \
- && ./Main
diff --git a/src/backend/tracers/index.js b/src/backend/tracers/index.js
deleted file mode 100644
index d41b0493..00000000
--- a/src/backend/tracers/index.js
+++ /dev/null
@@ -1,2 +0,0 @@
-export { default as ImageBuilder } from './ImageBuilder';
-export { default as WorkerBuilder } from './WorkerBuilder';
diff --git a/src/backend/tracers/java/Dockerfile b/src/backend/tracers/java/Dockerfile
deleted file mode 100644
index 8aabc076..00000000
--- a/src/backend/tracers/java/Dockerfile
+++ /dev/null
@@ -1,8 +0,0 @@
-FROM openjdk:8
-
-ARG tag_name
-
-RUN curl --create-dirs -o /usr/local/lib/algorithm-visualizer.jar -L "https://github.com/algorithm-visualizer/tracers.java/releases/download/${tag_name}/algorithm-visualizer.jar"
-
-CMD javac -cp /usr/local/lib/algorithm-visualizer.jar Main.java \
- && java -cp /usr/local/lib/algorithm-visualizer.jar:. Main
diff --git a/src/backend/tracers/js/worker.js b/src/backend/tracers/js/worker.js
deleted file mode 100644
index 7d5ac5b8..00000000
--- a/src/backend/tracers/js/worker.js
+++ /dev/null
@@ -1,14 +0,0 @@
-const process = { env: { ALGORITHM_VISUALIZER: '1' } };
-importScripts('/api/tracers/js');
-
-const sandbox = code => {
-  const require = name => ({ 'algorithm-visualizer': AlgorithmVisualizer }[name]); // fake require
-  eval(code);
-};
-
-onmessage = e => {
-  const lines = e.data.split('\n').map((line, i) => line.replace(/(\.\s*delay\s*)\(\s*\)/g, `$1(${i})`));
-  const code = lines.join('\n');
-  sandbox(code);
-  postMessage(AlgorithmVisualizer.Commander.commands);
-};
diff --git a/src/frontend/common/config.js b/src/common/config.js
similarity index 100%
rename from src/frontend/common/config.js
rename to src/common/config.js
diff --git a/src/frontend/common/stylesheet/colors.scss b/src/common/stylesheet/colors.scss
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rename from src/frontend/common/stylesheet/colors.scss
rename to src/common/stylesheet/colors.scss
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rename from src/frontend/common/stylesheet/dimensions.scss
rename to src/common/stylesheet/dimensions.scss
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rename from src/frontend/common/stylesheet/fonts.scss
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rename from src/frontend/common/stylesheet/index.scss
rename to src/common/stylesheet/index.scss
diff --git a/src/frontend/common/util.js b/src/common/util.js
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rename from src/frontend/common/util.js
rename to src/common/util.js
diff --git a/src/frontend/components/App/index.jsx b/src/components/App/index.jsx
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rename from src/frontend/components/App/index.jsx
rename to src/components/App/index.jsx
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rename from src/frontend/components/App/stylesheet.scss
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rename from src/frontend/components/BaseComponent/index.jsx
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rename from src/frontend/components/Button/index.jsx
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rename from src/frontend/components/Button/stylesheet.scss
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rename from src/frontend/components/CodeEditor/index.jsx
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rename from src/frontend/components/CodeEditor/stylesheet.scss
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rename from src/frontend/components/Divider/index.jsx
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rename from src/frontend/components/Divider/stylesheet.scss
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rename from src/frontend/components/Ellipsis/index.jsx
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rename from src/frontend/components/Ellipsis/stylesheet.scss
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rename from src/frontend/components/ExpandableListItem/index.jsx
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rename from src/frontend/components/FoldableAceEditor/index.jsx
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rename from src/frontend/components/Header/index.jsx
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rename from src/frontend/components/Header/stylesheet.scss
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rename from src/frontend/components/index.js
rename to src/components/index.js
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rename from src/frontend/core/layouts/HorizontalLayout.js
rename to src/core/layouts/HorizontalLayout.js
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rename from src/frontend/core/layouts/Layout.jsx
rename to src/core/layouts/Layout.jsx
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rename from src/frontend/core/layouts/index.js
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rename from src/frontend/core/renderers/GraphRenderer/index.jsx
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rename from src/frontend/core/renderers/GraphRenderer/stylesheet.scss
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rename from src/frontend/core/renderers/MarkdownRenderer/index.jsx
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diff --git a/src/frontend/core/renderers/index.js b/src/core/renderers/index.js
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diff --git a/src/frontend/core/tracers/Array1DTracer.js b/src/core/tracers/Array1DTracer.js
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diff --git a/src/frontend/core/tracers/Array2DTracer.js b/src/core/tracers/Array2DTracer.js
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diff --git a/src/frontend/core/tracers/ChartTracer.js b/src/core/tracers/ChartTracer.js
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diff --git a/src/frontend/core/tracers/GraphTracer.js b/src/core/tracers/GraphTracer.js
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diff --git a/src/frontend/core/tracers/LogTracer.js b/src/core/tracers/LogTracer.js
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diff --git a/src/frontend/core/tracers/MarkdownTracer.js b/src/core/tracers/MarkdownTracer.js
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diff --git a/src/frontend/core/tracers/Tracer.jsx b/src/core/tracers/Tracer.jsx
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diff --git a/src/frontend/core/tracers/index.js b/src/core/tracers/index.js
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diff --git a/src/frontend/files/algorithm-visualizer/README.md b/src/files/algorithm-visualizer/README.md
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diff --git a/src/frontend/files/index.js b/src/files/index.js
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diff --git a/src/frontend/files/scratch-paper/CONTRIBUTING.md b/src/files/scratch-paper/CONTRIBUTING.md
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diff --git a/src/frontend/files/skeletons/code.cpp b/src/files/skeletons/code.cpp
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diff --git a/src/frontend/files/skeletons/code.java b/src/files/skeletons/code.java
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diff --git a/src/frontend/files/skeletons/code.js b/src/files/skeletons/code.js
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diff --git a/src/frontend/index.jsx b/src/index.jsx
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diff --git a/src/frontend/reducers/current.js b/src/reducers/current.js
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diff --git a/src/frontend/reducers/directory.js b/src/reducers/directory.js
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diff --git a/src/frontend/reducers/env.js b/src/reducers/env.js
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diff --git a/src/frontend/reducers/index.js b/src/reducers/index.js
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diff --git a/src/frontend/reducers/player.js b/src/reducers/player.js
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diff --git a/src/frontend/reducers/toast.js b/src/reducers/toast.js
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diff --git a/src/frontend/static/favicon.png b/src/static/favicon.png
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diff --git a/src/frontend/static/manifest.json b/src/static/manifest.json
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diff --git a/webpack.backend.config.js b/webpack.backend.config.js
deleted file mode 100644
index 5185c701..00000000
--- a/webpack.backend.config.js
+++ /dev/null
@@ -1,45 +0,0 @@
-const CleanWebpackPlugin = require('clean-webpack-plugin');
-const nodeExternals = require('webpack-node-externals');
-const path = require('path');
-const fs = require('fs');
-
-const {
-  __DEV__,
-  backendBuildPath: buildPath,
-  backendSrcPath: srcPath,
-} = require('./environment');
-
-const alias = {
-  '/environment': path.resolve(__dirname, 'environment.js'),
-};
-fs.readdirSync(srcPath).forEach(name => {
-  alias['/' + name] = path.resolve(srcPath, name);
-});
-
-module.exports = {
-  target: 'node',
-  node: {
-    __dirname: true,
-  },
-  entry: srcPath,
-  externals: [nodeExternals()],
-  resolve: {
-    modules: [srcPath],
-    extensions: ['.js'],
-    alias,
-  },
-  output: {
-    path: buildPath,
-    filename: 'index.js',
-    libraryTarget: 'umd',
-  },
-  module: {
-    rules: [
-      { test: /\.js$/, use: 'babel-loader', include: srcPath },
-    ],
-  },
-  plugins: [
-    new CleanWebpackPlugin([buildPath]),
-  ],
-  mode: __DEV__ ? 'development' : 'production',
-};
\ No newline at end of file