HariHaran

Full Stack Developer with 2+ years of experience building and deploying production web applications using the MERN stack (MongoDB, Express.js, React.js, Node.js) and Python (FastAPI, Django). Hands-on expertise in JavaScript/TypeScript, REST API design, React Hooks, Redux, and responsive UI development, alongside secure backend development with JWT authentication and RBAC. Experienced with SQL and NoSQL databases (MongoDB, PostgreSQL), Redis caching, AWS cloud deployment (EC2, S3, Lambda, Cognito, WAF), Jenkins CI/CD, and Docker-ready workflows.

Delivered secure, scalable EdTech and HR platforms serving real users, including a production RAG-based AI chatbot integration. Immediately available to join, based in Bangalore, with a track record of optimizing performance, reducing costs, and shipping features end-to-end.

Full Stack Developer - Bnr Cogniitec Private Limited

(2024-12 - 2026-04)

• Built full-stack features end-to-end using the MERN stack (React.js, Node.js/Express.js, MongoDB) and Python (FastAPI microservices), following clean, reusable, component-based architecture.
• Designed and developed secure, scalable REST APIs with JWT authentication and RBAC (AWS Cognito, AWS WAF), protecting the platform against common web threats.
• Engineered and deployed Skillorea, a scalable EdTech SaaS platform, on AWS EC2 with Jenkins CI/CD pipelines for reliable, zero-downtime releases.
• Built an AI chatbot using the Gemini API with RAG architecture for intelligent test validation, reducing manual review effort for the assessment team.
• Integrated third-party REST APIs and services, including Razorpay (payments with webhook reconciliation), Zoom (virtual classrooms), and Google Maps (real-time tracking).
• Optimized application performance using Redux state management, lazy loading, and Redis caching, reducing API costs and improving response times.
• Built real-time features using Socket.io (WebSockets) and integrated FastAPI microservices to extend platform AI capabilities.

Software Developer - Galaxi Engineering Technology Service

(2023-02 - 2024-03)

• Built a full-stack MERN application — Attendance Management System (React.js, Node.js/Express.js, MongoDB Atlas) — with secure RESTful APIs, streamlining HR and payroll processing.
• Designed a multi-role access control system (Admin, Manager, Employee) with JWT-based authentication and granular, role-based permissions.
• Integrated AWS S3 for secure document storage and built an automated salary slip generation system with download capabilities.
• Optimized MongoDB/PostgreSQL queries and RESTful APIs with proper error handling, improving reliability and response times between frontend and backend systems.

Bachelor of Engineering (B.E.) - Computer Science - SNS College