Arul Patron

I've built production backend services at Efficient Works using Node.js, Express.js, and MySQL, improving API response consistency and system reliability.

I design secure RESTful APIs with JWT access and refresh token rotation, role-based access control, normalized database schemas, and optimized SQL queries. I also write unit and integration tests with Jest and Supertest while collaborating through Agile Scrum, code reviews, debugging, and Git workflows.

For ShopHub, I architected a modular e-commerce API covering authentication, catalog, carts, and orders, including transaction-safe checkout with row locking to prevent overselling. I containerized the frontend and backend with Docker and Nginx and built an admin dashboard with React, Redux Toolkit, and Material UI.

I've also built a real-time messaging backend with Socket.IO, JWT-secured WebSocket connections, group chat, delivery receipts, typing indicators, and presence tracking. My work spans API design, microservices, database performance, Docker deployment, and full-stack application delivery.