Hiring || MERN Stack Developer - Kolkata
Onsite full-stack MERN developer (4-7 yrs) in Kolkata who owns the whole lifecycle of scalable web apps — React/TypeScript frontends, Node/Express REST and GraphQL APIs, MongoDB tuning, Playwright testing — plus n8n workflow automation and AI/LLM API integration (prompt engineering, RAG, embeddings).
- Compensation
- Not disclosed
- Location
- Kolkata, India
- Work setup
- Not specified
- Seniority
- Not specified
- Employment
- Not specified
- Experience
- 4+ years
- Category
- Not specified
- Posted
Skills
Must have
- 4-7 years of professional software development experience
- Hands-on proficiency with the MERN stack (MongoDB, Express.js, React, Node.js)
- Mastery of React architecture, including hooks and state management
- Node.js/Express skills: middleware, routing, authentication
- Strong command of MongoDB schema design
- Building RESTful APIs and managing async JavaScript (Promises, async/await)
- Frontend development with JavaScript, TypeScript, HTML, CSS
- Track record implementing automated testing suites with Playwright
- Experience building automation workflows, webhooks, and API integrations with n8n
- Familiarity with AI/LLM API integration, prompt engineering, and AI-assisted coding
- Git/GitHub/GitLab, CI/CD pipelines, deployment strategies, production environment management
- Strong problem-solving, ownership, communication, and code quality commitment
Nice to have
- Containerization with Docker and cloud deployment on AWS
- Redis, caching strategies, message queues (Bull/BullMQ), performance optimization
- Familiarity with RAG, vector databases, AI agents, or AI-driven applications
- History of integrating OpenAI or other leading LLM platforms
- Creating complex automation workflows within n8n
- Experience building applications with Next.js or other advanced React frameworks
Full description
MERN Stack Developer
Summary
We are looking for a seasoned Full Stack Developer with specialized expertise in the MERN stack to spearhead the complete lifecycle of scalable web applications. This position requires a forward-thinking professional who can oversee everything from frontend and backend architecture to database tuning, automated testing, and live deployment. The successful candidate will bring specific knowledge in Playwright for testing, n8n for workflow automation, and hands-on experience embedding AI and Large Language Model (LLM) functionalities into software products. This role is central to fostering technical innovation, upholding high code standards, and working collaboratively across teams to produce high-performance, reliable solutions.
Location: Kolkata
Responsibilities
- Design, build, and sustain scalable web applications using the MERN stack, including the development of REST and GraphQL APIs.
- Create responsive and dynamic user interfaces leveraging React, JavaScript, TypeScript, HTML, and CSS.
- Develop resilient backend services and business logic utilizing Node.js and Express.js.
- Architect, refine, and administer MongoDB data models, covering schema design, query optimization, indexing, and aggregation pipelines.
- Enable smooth integration with external platforms by connecting third-party APIs, webhooks, and payment processing systems.
- Implement rigorous end-to-end and functional testing frameworks using Playwright.
- Create and manage business logic automation and API-driven workflows via n8n.
- Integrate AI and LLM APIs to enhance application features and streamline automated processes.
- Utilize AI-powered coding tools and prompt engineering strategies to boost development speed and code quality.
- Apply advanced understanding of LLM mechanics, including tokens, context windows, embeddings, RAG, and AI agent behaviors, to address complex technical challenges.
- Handle version control operations, including branching strategies, code reviews, pull requests, and release management through Git-based platforms.
- Direct deployment procedures, manage environment configurations, handle application publishing, and provide ongoing production support.
- Perform detailed debugging and root-cause analysis for issues affecting applications, APIs, databases, and live systems.
- Uphold industry standards for secure coding, performance optimization, and long-term code maintainability.
- Collaborate with QA, UI/UX, Product, and DevOps teams to ensure seamless feature delivery from initial concept to final launch.