Shiv Shankar P.

Full Stack Developer with 6+ years of experience building, improving, and taking web and mobile applications from development to production. I mainly work with React, Next.js, React Native, Node.js, TypeScript, MongoDB, PostgreSQL, and MySQL, handling both frontend and backend development. A lot of the projects I work on are existing applications where the frontend is already partially built, but the backend, APIs, integrations, database layer, authentication, or production issues still need to be completed. I'm comfortable joining an existing codebase, understanding how it currently works, and continuing from there without rewriting things unnecessarily. WHAT I CAN HELP WITH: ✓ SaaS and marketplace applications ✓ React / Next.js web applications ✓ React Native mobile applications ✓ Node.js / Express / NestJS APIs ✓ REST API development and third-party integrations ✓ MongoDB, PostgreSQL, and MySQL ✓ Authentication, RBAC, and user management ✓ Payment and subscription integrations ✓ Real-time features with WebSockets / Socket IO ✓ API debugging and production issue fixing ✓ Database design and backend architecture ✓ AWS, VPS, Railway, and Vercel deployments ✓ Taking over existing or partially completed projects HOW I WORK: ✓ Understand the existing codebase before making major changes ✓ Work with the architecture that's already in place instead of rewriting unnecessarily ✓ Connect existing frontend screens with reliable backend APIs ✓ Handle both frontend and backend when the project requires it ✓ Debug issues across the frontend, API, database, and integrations ✓ Focus on production-ready implementation rather than just completing individual tasks I've worked across the full development cycle — from understanding an existing codebase and designing APIs to integrating the frontend, testing workflows, and getting the application ready for production. I also have experience working as a Team Lead, coordinating development across multiple projects and working with other developers on larger applications. If you already have an application in progress and need someone who can understand the existing code, finish the missing pieces, fix what's broken, and take ownership of the technical implementation, that's the type of work I usually handle.