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sayed_moin_ahmed/event-sourcing-examples

This is a banking application demonstrating event sourcing and CQRS patterns, implemented in both Java and Scala Spring Boot microservices. It manages account creation, customer data, and money transfers through a command-side that processes domain events and a query-side that maintains MongoDB read models. The system is supported by a React-based web frontend and includes comprehensive integration and end-to-end tests.

46.3

Weak · 5 August 2026

63k

lines of production code

JavaScript

with Java

2

bus factor · 6 authors in all

4

measurements over time

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How it got here

2014–2015 · Java and Scala Spring Boot examples

This period focused on establishing complete, modularized Java and Scala Spring Boot examples for event sourcing and CQRS patterns. The work included setting up build infrastructure, implementing domain models and microservices, and adding comprehensive integration and end-to-end tests for both stacks.

15 changes

2016–2017 · Initial microservices and frontend architecture

This period focused on establishing the foundational infrastructure for a microservices-based banking application, introducing an API gateway, authentication modules, and core domain services like accounts and customers. Simultaneously, the team built out the React-based frontend and implemented integration tests to verify the new system's behavior.

14 changes

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About this page

  • The description of this project is derived from its own commit history, not from its README.
  • The score is its highest published measurement, taken on 5 August 2026 at a pinned commit. It is not a live figure and does not change until the project is measured again.
  • Measured at commit 7dcafe5dea — the exact code this score is about.
  • Scored under rubric rubric-2026.08.19. Score the same commit under that rubric and you get the same number.
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