⚡ Event-Driven Microservices

Event-driven architecture with CQRS, Kafka and distributed tracing

Architecture

┌──────────┐    ┌───────┐    ┌──────────┐
│ Commands │───→│ Kafka │───→│ Handlers │
└──────────┘    └───────┘    └──────────┘
                    │
              ┌─────┴─────┐
              │   Events   │
              ├─────┬─────┤
              ↓     ↓     ↓
           Read   Saga   Event
           Model  Mgr    Store

Features

• 📨 Event sourcing — full audit trail with event replay
• 🔄 CQRS — separated read/write models for optimal performance
• 🔗 Saga orchestration — distributed transaction management
• 📊 Distributed tracing — OpenTelemetry integration
• 💀 Dead letter queue — automatic retry with backoff
• 📋 Schema registry — Avro/Protobuf schema validation

Services

Service	Description
api-gateway	REST/GraphQL entry point
order-service	Order management (CQRS)
payment-service	Payment processing
notification-service	Event-driven notifications
saga-orchestrator	Distributed transaction coordinator

Tech Stack

• Runtime: Node.js, TypeScript
• Messaging: Apache Kafka, RabbitMQ
• Database: PostgreSQL, MongoDB, Redis
• Tracing: OpenTelemetry, Jaeger
• Container: Docker, Kubernetes

Author

@redoh — Senior Full-Stack Engineer | Distributed Systems & Architecture