Microservices

Design and operate microservice architectures.

Service Boundaries

Bounded Context (DDD)

• Each service owns a domain concept
• Service has its own database (no DB sharing)
• Communication via API or events
• Avoid "shared" services (leads to tight coupling)

Service Sizing

• Too small: Nano-services — high overhead, hard to debug
• Too large: Distributed monolith — worst of both worlds
• Right size: Team can build, test, deploy independently

Communication Patterns