Senior MERN Developer – Full Stack Web Applications (Chennai)

Senior MERN Developer – Full Stack Web Applications (Chennai)

Job Title: Senior MERN Developer
Job Summary:
We are looking for an experienced Senior MERN Developer with strong expertise in building scalable, secure, and high-performance web applications using Postgres, MongoDB, Express.js, React.js, and Node.js. The ideal candidate has hands-on experience across the full SDLC, system design, performance optimization, API development, and mentoring engineers in production-grade environments.

Key Responsibilities:
* Design, develop, and maintain scalable full-stack web applications using the MERN stack (MongoDB, Express, React, Node) and Postgres.
• Own backend architecture and build robust REST APIs with proper validation, error handling, and security practices.
* Build responsive, modular, and maintainable front-end applications using React with strong component architecture.
* Design database schemas, optimize queries and indexes, and ensure data integrity and performance in MongoDB and Postgres As well.
* Implement authentication and authorization mechanisms (JWT/OAuth, RBAC), and follow secure coding standards.
* Drive application performance improvements: API latency reduction, React rendering optimization, caching, and database tuning.
• Collaborate with product, design, and QA teams to translate requirements into high-quality deliverables.
• Set up and improve CI/CD pipelines, code quality gates, and automated testing practices.
* Write unit/integration tests (Jest, Mocha/Chai, React Testing Library/Cypress) and ensure strong coverage for critical paths.




* Troubleshoot production issues, perform root-cause analysis, and implement preventive measures.
* Mentor junior developers, conduct code reviews, enforce best practices, and contribute to engineering standards and documentation.
* Work in an Agile environment and contribute to sprint planning, estimation, and continuous improvement.

Requirements:
* 6+ years of overall software development experience, with 4+ years building production applications with the MERN stack.
* Strong proficiency in Node.js (Express/NestJS) and building scalable backend services and APIs.
* Strong proficiency in React.js (Hooks, state management, performance optimization, component architecture).
* Solid experience with MongoDB / Postgres data modeling, aggregation pipelines, indexing, and performance tuning.
* Experience with TypeScript in both frontend and backend
* Strong understanding of system design, scalable architectures, and common patterns (queues, caching, pagination, rate limiting).
* Experience with Docker and deployment environments (AWS)
* Familiarity with CI/CD observability (logging/monitoring), and production operations.
* Robust debugging, problem-solving, and communication skills.
* Experience integrating third-party APIs, payment gateways, or real-time systems (WebSockets) is a plus.

Job Type:
* Full-time
* Location: On-site, Ambattur, Chennai
* Salary: Competitive, based on experience

Suitable Candidate can contact:
Teena Binu HR: (phone hidden)

📌 Senior MERN Developer – Full Stack Web Applications (Chennai)
🏢 RhythmRx Private
📍 Chennai