01Observability frameworks for distributed tracing, metrics, and health monitoring
02Distributed data management including Database-per-Service and Saga patterns
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04Synchronous and asynchronous communication patterns (REST, gRPC, Kafka, RabbitMQ)
05Resilience patterns including Circuit Breakers, Bulkheads, Retries, and Timeouts
06Domain-Driven Design (DDD) for defining clear bounded contexts and service boundaries