Vatsal User

I’m a Full Stack Developer with experience delivering 5+ production-ready web and mobile applications. I build scalable APIs and ship reliable features with clean, maintainable architecture, using React, React Native, Node.js, Express, and MongoDB.

At Chattary Ajwan Infotech Pvt. Ltd., I owned end-to-end delivery of 10+ features across mobile and backend systems used by 5K+ active users. I implemented 15+ REST APIs with Node.js and Express, enabling secure authentication and role-based access control, and reduced application load time by 20% through performance optimization.

Earlier, as a Frontend Developer Intern (Full Stack Exposure) at Bacancy Technology, I delivered 6+ responsive UI modules using React.js and Next.js and integrated frontend flows with 10+ backend APIs. My projects—SidClinic and WSRO—strengthen my product mindset, from OTP-based appointment booking for 500+ patients to processing 500+ secure online payments and reducing manual admin effort by 40%.