Personal website and engineering blog of Rajkumar Savani — Senior Full Stack Engineer specializing in Spring Boot backends, modern React frontends, and AI-accelerated delivery for banking, logistics, and healthcare.https://rajsavani.dev/en-usraj@rajsavani.dev (Rajkumar Savani)https://rajsavani.dev/blog/designing-idempotent-apis/https://rajsavani.dev/blog/designing-idempotent-apis/Why idempotency is critical for distributed systems, how to implement an idempotency key in your REST API, and the common edge cases you'll encounter in production.Wed, 30 Sep 2026 00:00:00 GMTAPI DesignArchitectureBackendBest Practiceshttps://rajsavani.dev/blog/event-driven-vs-rest/https://rajsavani.dev/blog/event-driven-vs-rest/A pragmatic look at synchronous vs. asynchronous communication in microservices. Stop debating and start choosing the right pattern for your specific domain requirements.Tue, 29 Sep 2026 00:00:00 GMTArchitectureMicroservicesEvent-DrivenSystem Designhttps://rajsavani.dev/blog/database-indexing-strategies/https://rajsavani.dev/blog/database-indexing-strategies/Creating a B-Tree index on every column isn't a strategy. Learn how to actually optimize database performance with composite indexes, covering indexes, and understanding when NOT to index.Mon, 28 Sep 2026 00:00:00 GMTDatabasePerformancePostgreSQLBackendhttps://rajsavani.dev/blog/spring-boot-exception-handling-production-guide/https://rajsavani.dev/blog/spring-boot-exception-handling-production-guide/How to build a clean, consistent error-handling strategy in Spring Boot REST APIs. Covers @ControllerAdvice, custom error responses, validation errors, security exceptions, and patterns I've used in banking and healthcare systems.Fri, 25 Sep 2026 00:00:00 GMTSpring BootJavaREST APIBest Practiceshttps://rajsavani.dev/blog/monolith-to-microservices-migration-guide/https://rajsavani.dev/blog/monolith-to-microservices-migration-guide/A practical, experience-based guide to migrating a legacy Java monolith to Spring Boot microservices. Covers strangler fig pattern, database decomposition, API gateway, and the mistakes that break real migrations.Fri, 18 Sep 2026 00:00:00 GMTMicroservicesSpring BootArchitectureJavahttps://rajsavani.dev/blog/sonarqube-spring-boot-code-quality-guide/https://rajsavani.dev/blog/sonarqube-spring-boot-code-quality-guide/How to integrate SonarQube with a Spring Boot project using Maven and Jenkins. Covers quality gates, fixing common code smells, security hotspots, and establishing a code quality workflow the team actually follows.Thu, 10 Sep 2026 00:00:00 GMTSpring BootCode QualityDevOpsJava