Mantu Kumar

Frontend / MERN Stack Developer

Noida 0+ yrs exp 81 · Excellent

About

MERN Stack Developer with hands-on experience architecting and deploying full-stack web applications using React.js, Node.js, Express.js, and MongoDB. Skilled in REST API design, JWT authentication, state management (Hooks, Context API), and integrating third-party/AI APIs into production systems. Shipped three independently deployed projects and completed a 4-month internship contributing to live, multi-developer codebases. Seeking an entry-level Frontend / MERN Stack Developer role.

Skills & Expertise (30)

MERN Stack Intermediate

4.5/10

0.3

Years Exp

VS Code Intermediate

4.5/10

0.3

Years Exp

GitHub Intermediate

4.5/10

0.3

Years Exp

React.js Intermediate

4.5/10

0.3

Years Exp

Git Intermediate

4.5/10

0.3

Years Exp

REST API Integration Intermediate

4.5/10

0.3

Years Exp

Node.js Intermediate

4.0/10

0.3

Years Exp

Asynchronous programming Intermediate

4.0/10

0.3

Years Exp

Postman Intermediate

4.0/10

0.3

Years Exp

MongoDb Intermediate

4.0/10

0.3

Years Exp

Express.js Intermediate

4.0/10

0.3

Years Exp

Responsive Design Intermediate

4.0/10

0.3

Years Exp

HTML5 Intermediate

4.0/10

0.3

Years Exp

CSS3 Intermediate

4.0/10

0.3

Years Exp

Tailwind CSS Beginner

3.5/10

0.3

Years Exp

MVC Architecture Beginner

3.5/10

0.3

Years Exp

JWT Authentication Beginner

3.5/10

0.3

Years Exp

Gemini AI Api Beginner

2.5/10

0.3

Years Exp

Python C/C++ SQL Render Vercel Hooks Usestate RESTful API Design useEffect Javascript (ES6+ useContext Context API

Work Experience

MERN Stack Developer Intern

Octalbees

Sep 2025 - Dec 2025

Engineered responsive, reusable UI modules in React.js using component-based architecture, replacing static views with dynamic components across multiple product areas. Integrated REST APIs with asynchronous data fetching, structured error handling, and loading states to improve frontend reliability and user experience. Collaborated in an Agile, Git/GitHub-based workflow — branching, pull requests, and peer code review — as part of a cross-functional, multi-developer team. Introduced lazy loading and code-splitting for key components, reducing initial render overhead and improving application maintainability.