Ship one scoped backend outcome without starting an open-ended engagement. I’ll build or finish a Spring Boot feature, REST API, third-party integration, authentication flow, PostgreSQL or Redis change, or focused backend fix—then hand it over tested and documented. Best for an existing SaaS product with a clear requirement and repository access. What’s included: • Written scope, acceptance criteria, and technical approach • Production-ready Java/Spring Boot implementation for one agreed outcome • PostgreSQL, Redis, API, or authentication work included when required • Automated tests, validation, and error handling • Setup notes, deployment guidance, and a handoff walkthrough Send me your current setup or requirement and I’ll tell you the cleanest way to build it.