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Rajat Saini

@rajatsaini4

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I build secure, scalable Node.js APIs and full-stack applications with TypeScript, PostgreSQL, and MongoDB.

India

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What I'm looking for

I'm looking to build secure, scalable backend and full-stack applications where I can deepen my experience with Node.js, TypeScript, databases, authentication, and modern architecture patterns.

I build backend-driven web applications using Node.js, Express.js, TypeScript, MongoDB, PostgreSQL, and Prisma ORM. My work includes REST APIs, authentication systems, and database-driven products.

I've developed secure JWT and cookie-based authentication APIs, implemented Google OAuth flows, and structured services around repositories, validation, middleware, and error handling. I also built AI Battle Arena, a deployed platform for comparing responses from multiple AI systems using LangGraph.

I'm currently developing a full-stack e-commerce platform with product management, wishlists, carts, checkout, orders, and payment workflows. I maintain detailed technical documentation covering JavaScript, TypeScript, React, backend architecture, databases, and authentication.

Experience

Work history, roles, and key accomplishments

Backend Developer

Rajat Saini

Backend-focused Full Stack Developer with hands-on experience building REST APIs, authentication systems, AI-powered applications, and database-driven web applications using Node.js, Express.js, TypeScript, MongoDB, PostgreSQL, and Prisma ORM.