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rohit User

@rohituser33

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MERN Developer at Dotsquares who optimized API read latency by 35% with database queries and Redis caching.

India

Message

At Dotsquares, I developed backend APIs for a university portal and villa rental platform using Node.js, Express.js, and MongoDB. I also optimized database queries and added Redis caching, reducing API read latency by 35%.

At Dev Technosys Private Limited, I developed real-time WebSocket microservices for a fantasy sports platform supporting 25,000+ concurrent active users. I also built BullMQ pipelines that processed 100,000+ daily financial transactions.

Earlier, as a MERN Developer Intern at Purezza Technologies, I built RESTful API endpoints for e-commerce and service marketplaces. I also built a personal developer portfolio while working as a React Developer Intern at Adsera IT Services.

Experience

Work history, roles, and key accomplishments

MERN Developer

Dotsquares

May 2024 - Aug 2024 (3 months)

Spearheaded backend API development for a university portal and a villa rental platform using Node.js, Express.js, and MongoDB, supporting 10,000+ monthly active users. Diagnosed and resolved 40+ production defect tickets, enhancing application fault tolerance and ensuring 99.9% system uptime.

NodeJS ExpressJS MongoDB Redis API Development Database Optimization Debugging

MERN Developer

Dev Technosys Private Limited

May 2023 - Apr 2024 (11 months)

Architected real-time WebSocket backend microservices for a Fantasy Sports Platform supporting 25,000+ concurrent active users, using Socket.IO and Redis Pub/Sub for live leaderboard updates. Engineered asynchronous event pipelines with BullMQ job queues to process 100,000+ daily financial transactions and automated contest prize payouts with 99.9% delivery reliability.

NodeJS ExpressJS MongoDB PostgreSQL Redis Socket.IO BullMQ WebSockets Microservices JWT RBAC Knex.Js

MERN Developer Intern

Purezza Technologies

Nov 2022 - Apr 2023 (5 months)

Built 20+ scalable RESTful API endpoints for multi-vendor e-commerce and service marketplaces using Node.js, Express.js, and MongoDB. Implemented global error handling and validation middlewares, cutting unhandled runtime exceptions by 50% and enforcing strict payload schema verification.

NodeJS ExpressJS MongoDB REST APIs Error Handling Validation React Tailwind

React Developer Intern

Adsera IT Services

May 2022 - Oct 2022 (5 months)

Designed and implemented 10+ responsive user interface modules for client web applications using React.js, JavaScript, and Tailwind CSS. Built and deployed a personal developer portfolio showcasing full-stack capabilities, achieving 98/100 Google Lighthouse performance score.

React JavaScript Tailwind Responsive Design Web Development