Sonu Mandal - Resume | MERN Stack & Backend Developer

Professional Summary

MERN Stack Developer and BCA student (CGPA 8.48) with a backend internship and 2 live full-stack applications deployed. Experienced in building REST APIs with Node.js, Express.js and MongoDB, and in implementing JWT authentication, Google OAuth, Razorpay payments and MVC architecture across 3 backend projects.

Technical Skills

Languages: JavaScript, C++ Backend: Node.js, Express.js, REST API design, MVC architecture, CRUD operations, middleware development Auth & Security: JWT, Google OAuth, bcrypt password hashing, protected routes, input validation Frontend: HTML5, CSS3, React.js Databases: MongoDB (Mongoose), MySQL Tools: Git, GitHub, Postman, VS Code

Education

Bachelor of Computer Applications — Full Stack and Cloud Computing 2027

Vivekananda Global University, Jaipur | CGPA: 8.48

Internship Experience

Backend Developer Intern — UpToSkills (UTS) Jun 2026 – Sep 2026

Maintained and extended backend features in Node.js, Express.js and MongoDB, following MVC architecture.
Wrote and tested REST API endpoints, resolving bugs to improve response reliability.
Collaborated with the development team on code reviews, Git workflows and deployments.

Project Experience

SkillArena — MERN Stack Coding & DSA Platform Jul 2026 – Present

Live: skillarena.sonumandal.in | Tech: MongoDB, Express.js, React.js, Node.js, REST API, JWT

Engineered a MERN-stack coding and DSA practice platform with JWT-secured user sessions, deployed live.
Implemented REST endpoints across 5 feature areas: challenge management, code submissions, XP scoring, user statistics and leaderboard ranking.
Designed Mongoose models and MVC controllers, integrated with a React.js frontend.

Grocery Website — Full Stack E-Commerce Application Jan 2026 – Mar 2026

Live: grocery.sonumandal.in | Tech: Node.js, Express.js, MongoDB, Mongoose, React.js, JWT, Google OAuth, Razorpay

Developed a full-stack e-commerce platform on the MERN stack with MVC architecture, deployed live.
Architected REST APIs for 4 modules (products, cart, orders, users), each supporting full CRUD operations.
Secured routes with 2 authentication methods, JWT sessions and Google OAuth, restricting sensitive endpoints to logged-in users.
Integrated the Razorpay payment gateway, enabling an end-to-end flow from cart to paid order.

Hostel Booking System Mar 2025 – Apr 2025

Tech: Node.js, Express.js, MongoDB, REST API

Delivered backend services for hostel room booking, covering room creation, updates and availability checks.
Added validation and error handling to keep data consistent and API responses reliable.
Tested every endpoint in Postman throughout development.

Certifications

Backend Developer Internship Certificate — UpToSkills (UTS) 2026