🚀 ExpenseTracker – A .NET 8 Microservices POC with Event Sourcing, RabbitMQ, and Kong Gateway

Hey devs! 👋

I’ve been working on a proof of concept for a microservices-based expense tracking app to experiment with modern architectural patterns in .NET 8. Thought I’d share it here in case it helps others or sparks some discussion.

🔧 Tech Stack

• .NET 8, C#
• Marten for event sourcing (PostgreSQL as event store)
• Wolverine for messaging and CQRS
• RabbitMQ for async communication
• Kong Gateway for routing and API gateway management
• Redis, Docker Compose, and Testcontainers for integration testing

⚙️ Features

• Clean Architecture & DDD structure

• Two main services:

  • ExpenseService handles commands like deposit/withdraw
  • AuditService listens to events and builds projections

• Full local environment with Docker

• Swagger UIs for each service

• Health checks, testing setup, and more

📦 GitHub Link

🔗 https://github.com/aekoky/ExpenseTracker

It’s a POC (not production-ready), but should be a useful reference if you're exploring:

• Event-driven systems
• CQRS/Event Sourcing in .NET
• Service communication with RabbitMQ and Wolverine
• Setting up integration tests with Testcontainers

Would love feedback or questions — happy to dig into implementation details!