Reference Java framework for backend offering intelligent auto-configuration and complete ecosystem for REST APIs, microservices and reactive applications. Modular architecture with Spring Data JPA, Spring Security, and Spring Cloud for cloud-native apps.
Intelligent auto-configuration and ready-to-use starters
Spring MVC & REST for modern APIs with validation
Spring Data JPA with Hibernate for persistence
Spring Security with JWT, OAuth2 and advanced authentication
Comprehensive testing (JUnit, Mockito, @SpringBootTest, slices)
Actuator for production monitoring and metrics
Reactive programming with WebFlux (Mono/Flux)
Microservices and Spring Cloud (Config, Discovery, Gateway)
Transactions, caching (Redis, Caffeine) and async/scheduling
Docker containerization and GraalVM native images
The most important concepts to understand this technology and ace your interviews
Spring Core: IoC, Dependency Injection, beans and scopes
Auto-configuration, starters and configuration (properties/YAML)
Spring MVC, REST controllers (@GetMapping, @PostMapping, etc.)
Request/response handling (@PathVariable, @RequestBody)
Bean Validation and exception handling
Spring Data JPA: entities, relationships, repositories and queries
Spring Security: authentication, authorization, JWT, OAuth2
Transactions (@Transactional), propagation and isolation
Testing: unit tests (Mockito) and Spring Boot tests
Actuator, logging (SLF4J/Logback) and monitoring
Caching with @Cacheable, providers (Redis, EhCache)
Async (@Async), scheduling (@Scheduled) and events
WebFlux and reactive programming (Mono, Flux)
Microservices: Spring Cloud Config, Service Discovery, API Gateway
Performance, optimization, Docker and GraalVM native images
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