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Amar Kumar

@amarkumar

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Senior Full-Stack Engineer skilled in TypeScript, Node.js & React, passionate about AI and building scalable solutions.

India

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What I'm looking for

I’m looking for a challenging role where I can apply my full-stack development expertise to build impactful, scalable products, work with modern technologies, and contribute to innovative problem-solving. I value collaborative teams, growth opportunities, and a culture that encourages learning and experimentation.

I am a Senior Full-Stack Engineer with expertise in building scalable web applications using modern technologies like TypeScript, Node.js, React, and the MERN stack. Over my career, I have designed and delivered complex systems involving real-time features, third-party API integrations, and high-performance backend architectures. I thrive in problem-solving, optimizing performance, and writing clean, maintainable code.

Beyond my core role, I am exploring AI engineering, data science, and cloud-based solutions, aiming to blend software engineering with intelligent automation. I have a strong interest in emerging technologies, the automobile industry, and building innovative products that solve real-world problems.

I have successfully led projects end-to-end, collaborated across teams, and mentored developers to deliver high-quality results. My goal is to continue growing into a highly skilled, impact-driven professional while contributing to cutting-edge products.

Experience

Work history, roles, and key accomplishments

Senior Backend Engineer

Nes.tech

Apr 2024 - May 2025 (1 year 1 month)

Architected backend microservices for a high-throughput fintech payment gateway, processing 20K+ daily transactions while reducing latency by 40% and ensuring 99.95% reliability. Designed a modular Node/TypeScript SDK used by 100+ client apps that halved integration time and cut onboarding costs 50%, and implemented zero-trust auth, real-time notifications, and analytics.

OAUTH2 OAuth2 NodeJS TypeScript Express PostgreSQL MongoDB Docker AWS ECS WebSockets JWT

Tech Lead

ThinkJs

Mar 2021 - Mar 2024 (3 years)

I Joined the ThinkJs team to build a backend system
Here I have built these applications
and designed Monolith system architectures for the healthcare professional. A job portal to find new medical jobs with tele-consultancy features.

I have written complete backend code with Express, MongoDB, and Mongoose and led a small team on the front end with React, Redux, and Tailwind.

JavaScript AWS Typescript Nodejs MongoDB PostgreSQL

Backend Engineer

Juntrax Solutions

Sep 2019 - Mar 2021 (1 year 6 months)

Led end-to-end redesign of an internal HR management system used by 500+ employees, improving scalability and reducing onboarding time by 40% and HR operational errors by 25%. Migrated legacy Meteor.js frontend to React and Tailwind CSS and resolved 150+ Jira tickets in 60 days to accelerate delivery.

TailwindCSS RESTful APIs HRIS Performance Optimization System Scalability React Tailwind CSS Frontend Migration Agile Jira

Fullstack Engineer

Sigmato Solutions

Feb 2019 - Aug 2019 (6 months)

Contributed across the stack to build a real-time teleconsultation module using WebRTC and Socket.io that cut average wait times by 50%. Implemented RESTful APIs for appointment scheduling, e-prescriptions, and payment workflows, driving a 15% adoption increase within 3 months and integrated Razorpay for secure in-app payments.

Socket.IO React Native Redux Node.js Mongoose WebRTC RESTful APIs Razorpay NodeJS

Education

Degrees, certifications, and relevant coursework

International Institute of Information Technology, Bangalore

Postgraduate Diploma, Data Science and Artificial Intelligence

Pursuing a Postgraduate Diploma in Data Science and Artificial Intelligence at the International Institute of Information Technology, Bangalore, expected completion January 2026.