Software design patterns and principles
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A practical guide to Clean Architecture in Java — with real project structure, layer responsibilities, and a complete Spring Boot example that you can apply to production services.
A practical guide to the Saga pattern for managing distributed transactions across microservices — with Java examples, choreography vs orchestration comparison, and real-world use cases from fintech.
A clear explanation of the five SOLID principles with practical Java examples — the foundation of clean, maintainable, and scalable object-oriented design.