✅ While you are upgrading in Spring Boot & Microservice, consider preparing in below areas:
Spring Boot Fundamentals : Auto-configuration, Starter dependencies, Embedded servers, Spring Boot annotations, Configuration properties, Profiles
Spring Core: Dependency Injection , Inversion of Control, Bean lifecycle, ApplicationContext
REST API Development : REST controllers, Request/Response mapping, Validation, Exception handling, API design
Data Access : Spring Data JPA, Hibernate, Entity mapping, CRUD operations, Transactions
Security : Spring Security, Authentication, Authorization, JWT, OAuth 2.0
Testing : JUnit, Mockito, Unit testing, Integration testing, API testing
Monitoring & Logging : Spring Boot Actuator, Health checks, Metrics, Logging
Build Tools : Maven, Gradle, Dependency management
Microservices : Microservices architecture, Service discovery, API Gateway, Inter-service communication
Caching & Performance : Caching, Redis, Performance tuning
Messaging & Async : Apache Kafka, RabbitMQ, Asynchronous processing
DevOps & Deployment : Docker, CI/CD, Cloud deployment, Amazon Web Services
