Gadget Guruz Pvt Ltd

As a MERN Developer, you will be a full-time, on-site member of our Delhi NCR team, owning the design, implementation and maintenance of our core server-side systems. You’ll work in a fast-paced, growth-stage startup environment—with blurred lines between Dev, Ops and Product—to build scalable, secure and high-performance APIs that power both web and mobile clients. Key Responsibilities Architecture & Development Design, develop, and maintain backend applications using Node.js, Express.js, and MongoDB. Build and document RESTful/GraphQL APIs for web (React) and mobile (Flutter) clients. Follow clean-code and OOP principles in all backend implementations. Database & Performance Model and optimize MongoDB schemas and manage migrations. Perform query optimization and debugging for performance tuning. Implement caching, job queues, and conduct load testing as needed. Cloud Infrastructure Deploy, monitor, and maintain backend services on cloud platforms (AWS, Heroku, Vercel). Define Infrastructure-as-Code with Docker or serverless tools. AI/ML & Real-Time Features Build real-time chat/notification services using Socket.IO or WebSockets . Collaborate with data teams to integrate AI/ML models via inference APIs. Integrate third-party APIs, payment gateways, or webhooks. Quality & Security Enforce web-security best practices (OWASP, input validation, encryption) Set up and maintain CI/CD pipelines, perform unit/integration tests (Jest, Mocha, etc.). Maintain version control workflows using Git. Collaboration & Mentorship Work closely with frontend (React) and mobile (Flutter) teams for API contract design. Participate in code reviews, documentation, and knowledge-sharing sessions. Mentor junior engineers and drive code reviews, documentation and knowledge sharing MUST have qualification 4+ years of backend experience with the MERN stack (Node.js, Express.js, MongoDB, React exposure desirable). Bachelor’s degree in Computer Science, Software Engineering or a related field Proficiency in JavaScript (ES6+), OOP, asynchronous programming, and API construction. Hands-on experience with MongoDB and schema design. Proven track record building and securing RESTful or GraphQL APIs Hands-on AWS experience (EC2, RDS, S3, Lambda) and IaC (Terraform/CloudFormation) Solid understanding of web security best practices (OWASP Top 10, HTTPS, CSRF/XSS mitigation) Experience with version control workflows (Git) and setting up CI/CD Demonstrated ability to thrive in a growth-stage startup environment Preferred Skills Real-time frameworks: Node.js/Express.js with Socket.IO or Pusher. Containerization (Docker) and orchestration (Kubernetes) Exposure to AWS, Vercel, Heroku, or similar platforms for cloud deployment Experience with integrating third-party APIs. NoSQL databases (MongoDB, DynamoDB) Serverless architectures (AWS Lambda, API Gateway) AI/ML model deployment and inference pipelines Prior work in electronics, logistics, or customer service support domains. Job Type: Full-time Pay: From ₹60,000.00 per month Benefits: Paid sick time Work from home Work Location: In person