Spring Boot Development Patterns Spring Boot architecture and API patterns for scalable, production-grade services. When to Activate - Building REST APIs with Spring MVC or WebFlux - Structuring controller → service → repository layers - Configuring Spring Data JPA, caching, or async processing - Adding validation, exception handling, or pagination - Setting up profiles for dev/staging/production environments - Implementing event-driven patterns with Spring Events or Kafka REST API Structure Repository Pattern (Spring Data JPA) Service Layer with Transactions DTOs and Validation Exception Han…