1-2 Years of Experience (Junior Developer)

• Spring Boot Basics:
  • What is Spring Boot? Why use it?
  • Key features of Spring Boot (Auto-Configuration, Starter Dependencies, Spring Initializer)
  • Spring Boot Annotations (@SpringBootApplication, @RestController, @RequestMapping, etc.)
  • Creating a simple REST API with Spring Boot
• Dependency Injection & @Autowired
  • Types of Injection (Constructor, Setter, Field)
  • @Autowired annotation and its internal working
• Spring Boot Configuration:
  • application.properties vs application.yml
  • Profiles (@Profile annotation)
• Spring Data JPA:
  • CRUD operations using Spring Data JPA
• Spring Boot Actuator
  • Health check endpoints
• Basic Exception Handling
  • @ControllerAdvice and @ExceptionHandler
• Spring Boot Testing
  • Writing unit and integration tests
  • Testing with @SpringBootTest

3-4 Years of Experience (Mid-Level Developer)

• Spring Boot Internals:
  • Spring Boot AutoConfiguration (how it works internally)
  • Custom AutoConfiguration
• Spring Boot Starter Projects:
  • Understanding Spring Boot Starters and creating custom starters
• Advanced Exception Handling:
  • Global Exception handling
  • Custom Exception classes
• Spring Data JPA:
  • Complex Relation mapping - 1-1, 1-many, many-1, many-many
  • Query methods and custom queries and JPQL
  • @Entity, @Repository, @Transactional annotations
• Spring Security Basics:
  • Spring Boot Security (In-memory Authentication, JWT)
• Caching in Spring Boot:
  • @Cacheable, @CacheEvict, cache strategies
• Spring Boot Profiles & Configuration Management:
  • Working with multiple profiles
  • External configuration (property files, YAML, environment variables)

5-7 Years of Experience (Senior Developer)

• Microservices Architecture:
  • Building Microservices using Spring Boot
  • Service discovery (Eureka) and Load balancing (Ribbon)
  • API Gateway (Zuul, Spring Cloud Gateway)
  • Distributed tracing (Sleuth, Zipkin)