I specialize in building "Source of Truth" backend architectures that eliminate the most common cause of system failure: Contract Mismatches. Using Node.js, NestJS, and TypeScript, I engineer custom frameworks that unify API routing, validation (Yup/AJV), and OpenAPI generation into a single interface. This "Documentation-as-Code" approach accelerates engineering velocity by automating the frontend-backend handoff and providing real-time schema updates for SDKs and AI agents. I have a proven track record of reducing technical debt in environments with millions of users, ensuring that your system remains robust, self-validating, and developer-friendly from day one