Full-Stack MERN Developer

Mellow Vault is hiring a Full-Stack MERN Developer! About the Company: Mellow Vault is an engineering-first technology ecosystem building developer platforms, cloud sandboxing products, real-time execution systems, and enterprise recruitment infrastructure. The team creates dependable web applications and distributed services that help developers learn, build, and evaluate software at scale. Responsibilities: • Build modular, responsive interfaces with React.js and manage complex application state using Redux Toolkit, Redux Thunk, or Redux Saga. • Design, implement, document, and maintain secure RESTful APIs with Node.js and Express.js, including validation, pagination, rate limiting, and robust error handling. • Develop efficient MongoDB data models with Mongoose, aggregation pipelines, transaction safeguards, and appropriate indexing strategies. • Implement authentication and authorization workflows using JWT, OAuth2, and role-based access control. • Create real-time data flows, caching approaches, optimistic updates, automated tests, and maintainable CI/CD-ready code. • Participate in architecture discussions, peer reviews, debugging, and end-to-end delivery of production features. Requirements: • Applicants should have 2 to 5 years of commercial experience delivering production software with the MERN stack. • Strong JavaScript and React fundamentals, including hooks and component design, are required, along with practical expertise in Redux Toolkit, Node.js, Express.js, asynchronous programming, REST API design, and MongoDB schema optimization. • Familiarity with OpenAPI or Swagger, Git and GitHub workflows, Postman or Insomnia, Docker, Jest or Mocha, and secure API development is expected. • Exposure to WebSockets, AI or LLM integrations, TypeScript, Next.js, Redis, AWS, or automated deployment pipelines will be valuable. • The role suits an engineer who solves technical problems methodically, writes maintainable code, takes ownership of delivery, and can explain architecture decisions clearly. • This is a hybrid, full-time employment opportunity based in Noida, with monthly compensation of ₹30,000 to ₹1,00,000 depending on skills and experience.