Spring Boot Architecture: Real-World API Design & Scalability
Production patterns for REST APIs, security, event-driven systems, and database optimization. Built from 6+ years of backend engineering.
REST API Design
Clean architecture with layered design: Controller → Service → Repository. Versioned APIs, pagination, filtering, and OpenAPI documentation. Idempotent ingestion for partner integrations.
High-traffic endpoints demand consistent response shapes, proper HTTP semantics, and rate limiting. Redis-backed caching for read-heavy workloads.
Security: JWT, RBAC, Keycloak
Authentication with JWT and OAuth2. Role-based access control (RBAC) across business domains. Keycloak for SSO and tenant-aware auth in multi-tenant platforms.
Audit trails, token refresh flows, and secure credential handling. Defense in depth for production systems.
Event-Driven Systems
Kafka for async processing and inter-service communication. Data consistency through event sourcing patterns. Scalable workflows for campaign management, lead attribution, and inventory sync.
See event-driven architecture with Kafka for a deeper dive.
PostgreSQL Optimization
Schema design for tenant isolation, indexing strategies for high-volume queries, connection pooling. Flyway migrations for versioned schema evolution.
Complex queries optimized for read-heavy workloads. Proper use of EXPLAIN and index tuning.