Open to opportunities

Ajay kumar

@ajaykumar28

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Full-Stack Developer (MERN & Vue) delivering production-grade web apps and performant systems.

India

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What I'm looking for

I seek a mid-level full-stack role building scalable web products with real-time features, strong engineering practices, and opportunities to improve performance and deploy production systems.

I am a Full-Stack Developer experienced in building scalable, production-grade web applications using the MERN stack and Vue, with a focus on clean code, performance and system design.

I have delivered 10+ client projects and multiple live products, integrating features like payment gateways, real-time Socket.IO communications, OpenAI automation, and complex MongoDB aggregation pipelines to improve speed and reliability.

I collaborate well in Agile teams, optimize systems (reducing load times and improving throughput), and deploy applications using Linux/Nginx with a priority on maintainability and measurable impact.

Experience

Work history, roles, and key accomplishments

Current

Full Stack Developer

Current

Lifelayer Health Solutions Pvt. Ltd.

Dec 2024 - Present (1 year 6 months)

Engineered a doctor appointment booking system with planner and payment integration, reducing codebase by 30% and improving system speed by 20%; optimized Socket.IO chat and integrated BullMQ/Redis to improve chat performance and background processing by 40%.

React Express MongoDB Socket.IO Redis BullMQ Nginx Payment Integration

Full Stack Web Developer

Hannanth Digital India Private Limited

Apr 2024 - Nov 2024 (7 months)

Delivered 10+ complete web applications and built an exam platform with real-time analytics and Socket.IO; implemented 15+ feature enhancements raising company website ratings by 35% and improved response times by 20%.

React Firebase Socket.IO Stripe Performance Optimization WebSockets REST APIs