Published onJuly 10, 2026Spring Cloud Gateway with Spring Boot 4: Routing, Security, Resilience, and BFF CompositionSpring-Cloud-GatewaySpring-BootAPI-GatewayMicroservicesResilience4jOAuth-2.0Build a production-oriented Spring Cloud Gateway on Spring Boot 4 with compatible dependencies, reactive routing, JWT security, timeouts, circuit breakers, rate limiting, and a maintainable BFF composition boundary.