I started with service decomposition and drew out a rough domain boundary diagram in my head, then talked through inter-service communication.
Start by clarifying the business domain and key requirements (e.g., scalability, latency, consistency) before diving into the design. Then propose a high-level microservices architecture using Spring Boot, highlighting service decomposition, communication patterns, and data management. Finally, discuss trade-offs and how you would address cross-cutting concerns like security, monitoring, and deployment.
Pro tip: Emphasize that microservices are not a silver bullet; show maturity by discussing when a monolith might be preferable and how you would evolve the architecture incrementally. Also, mention specific Spring Cloud components (e.g., Eureka, Hystrix, Gateway) to demonstrate hands-on experience.
Ask questions to understand the domain, expected load, consistency needs, and team structure. This ensures your design is tailored to the problem rather than generic.
Decompose the system into loosely coupled services based on business capabilities (e.g., user, order, inventory). Use domain-driven design to define bounded contexts.
Choose synchronous (REST, gRPC) or asynchronous (messaging) communication. Decide on data consistency patterns (e.g., Saga, CQRS) and database per service.
Incorporate service discovery, API gateway, configuration management, security, and observability using Spring Cloud and related tools.
Acknowledge challenges like distributed transactions, latency, and operational complexity. Explain how you would monitor, deploy (e.g., containers, Kubernetes), and evolve the architecture.
AI-generated suggestions, not part of the candidate's original notes. May be inaccurate — verify before relying on them.