Domain-Driven Design With Event Sourcing, Akka Cluster Sharding, Cassandra, Kafka, Scala. Distributed & Reactive Trading System. FinTech Use Case.

Use Case

The application is about a simple financial trading system. It has 3 main microservices and an API Gateway. Using Domain-Driven Design, Event Sourcing, Akka Cluster Sharding, Cassandra, Kafka, Event-Driven, Reactive microservice pattern. Using the asynchronous, non-blocking style of systems development and Akka toolkits. Distributed and Reactive solution that can serve millions of users concurrently.

Domain-Driven Design + Akka Cluster + EventSourcing creates an ultimate trio for building fast, resilient, scalable, distributed applications that can serve millions of concurrent users at scale.

Akka makes building powerful concurrent & distributed applications simple. Akka strictly adheres to the Reactive Manifesto. Reactive applications aim at replacing traditional multithreaded applications with an architecture that satisfies one or more of the following requirements:

StockTrading Service has 3 Bounded contexts

Portfolio Service Microservice is responsible for buying and selling and reconstructing our portfolio holdings to determine investor profit and loss.

Trade Order Service Microservice is responsible for the stock quote and executes trade orders via the exchange e.g NASDAQ

Account Service Microservice is responsible for managing customer accounts like account balance, customer profile.

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