Microservices
Aethera Bank v2 (Banking-App)
An enterprise-grade banking simulation using microservices, CQRS and the Saga pattern, with React micro-frontends, Kafka event streaming and full observability (ELK, Prometheus, Grafana, Jaeger).
Problem
Models distributed-transaction management, cross-service consistency and observability the way a real bank's backend would need to handle them, at enterprise scale.
Highlights
- Custom Saga orchestrator over Kafka for distributed transactions
- CQRS read-side backed by Elasticsearch
- API Gateway with JWT auth, Redis rate limiting, Resilience4j circuit breaker
- Full observability: ELK, Prometheus/Grafana, Jaeger tracing
- Micro-frontends via Webpack Module Federation
Architecture and notes
Services stay consistent through a custom Saga orchestrator over Kafka instead of distributed transactions, and the read side is a CQRS projection in Elasticsearch. Traffic enters through an API gateway (JWT authentication, Redis rate limiting, Resilience4j circuit breaker), the React front end is split into micro-frontends with Webpack Module Federation, and logs, metrics and traces are collected with ELK, Prometheus/Grafana and Jaeger.