From Spring Boot to Quarkus

Short summary

An experienced Spring Boot developer shares lessons from building a microservices system in Quarkus, covering identity, catalog, order services, and an API gateway. Key differences include Quarkus's build-time annotation processing versus Spring's runtime evaluation, sub-second dev loop with hot reload, and Panache's active-record pattern as an alternative to Spring Data JPA repositories. The author finds Quarkus genuinely faster for development but notes it represents a different philosophy, not just a lighter Spring Boot.

• •Quarkus uses build-time processing for sub-second startup and seamless hot reload vs Spring Boot's runtime evaluation
• •Panache offers active-record pattern alongside repository pattern, differing from Spring Data JPA's interface-only approach
• •Author built a full microservices system with JWT security, PostgreSQL, and Docker Compose to compare the two frameworks

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