Senior MERN Stack Developer for Full-Stack Web Application Development & System Architecture

We are seeking a highly experienced Senior MERN Stack Developer to lead the development of a full-scale web application using MongoDB, Express.js, React.js, and Node.js. The ideal candidate must have strong experience in full-stack architecture, secure backend logic, scalable frontend systems, API design, database optimization, and end-to-end deployment workflows.

You will be responsible for designing complex backend architectures using Express or NestJS, implementing secure REST APIs, building role-based access systems, handling authentication using JWT or OAuth, and managing business logic, caching, and microservices (if required). Strong experience with Node.js async programming, event-driven architecture, and error-handling best practices is mandatory.

On the frontend, you must build highly responsive and modular React components using Hooks, Context API, Redux Toolkit, Zustand, or other state management solutions. You will implement reusable UI layouts, dynamic forms, dashboards, data tables, charts, and user flows, while ensuring pixel-perfect integration with Figma or XD designs. Knowledge of performance optimization, memoization, virtualization, and front-end security is essential.

You will architect database structures with MongoDB, design scalable collections, create indexes, optimize queries, manage aggregations, implement transactions (if needed), and maintain high data integrity. Experience with Mongoose schemas, relations, pipelines, and query optimization is required.

Performance optimization plays a central role — including reducing API latency, optimizing bundle size, implementing Redis for caching, enabling lazy loading and code splitting, improving Lighthouse scores, and enhancing both client-side and server-side performance. Real-time features using Socket.io or WebSockets are a plus.

You must manage full DevOps workflows: environment variable management, CI/CD pipelines, containerization using Docker, API documentation using Swagger/Postman, and deployment on AWS, Azure, DigitalOcean, or Render. You will configure reverse proxies (Nginx), SSL certificates, load balancing, and horizontal scaling when required.

Security responsibilities include implementing proper access control, preventing injection attacks, sanitizing input, securing cookies, handling sessions safely, implementing rate-limiters, and ensuring compliance with security best practices across the entire MERN stack.

You will collaborate with UI/UX designers, QA testers, backend specialists, and product owners to deliver production-ready modules. Strong debugging skills, architectural decision-making, clean code principles, and the ability to implement large-scale features with efficiency and clarity are essential.

Candidates must share previous MERN stack work samples, GitHub repositories, product links, or architecture breakdowns to demonstrate real-world full-stack experience.