Looking for a job

Rajat User

@rajatuser10

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I build scalable fintech and SaaS applications across React, Node.js, cloud infrastructure, and payment workflows.

India

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What I'm looking for

I'm looking to build scalable, reliable web or mobile products in a remote engineering environment where I can own technical decisions, solve complex production problems, mentor developers, and collaborate closely with product and engineering teams.

I've built and supported production web and mobile applications across fintech, payments, SaaS, and product engineering for more than nine years. My work spans React, Next.js, React Native, Node.js, APIs, databases, and AWS.

As a freelance Senior Software Engineer, I own applications end to end—from technical analysis and architecture through deployment and production support—and build reliable payment workflows with Stripe. Previously, I led React development at Webshar and engineering teams at Taskcraft Technologies and Thoughtwin, designing reusable architecture, resolving production issues, and mentoring developers.

I've contributed to investor workflows at Cred-iq, payment integrations, the Sketchnote project-management platform, FutureSkill, and a React Native survey application. I focus on maintainable components, sound API contracts, performance, validation, and sustainable fixes for complex problems.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer / Full Stack Developer

Current

Freelance / Self-Employed

Apr 2025 - Present (1 year 5 months)

Own the end-to-end development lifecycle for web and mobile applications, covering technical analysis, architecture, implementation, testing, deployment, and production support. Design and develop scalable applications using TypeScript, React.js, React Native, Node.js, REST APIs, GraphQL, PostgreSQL, and MongoDB.

TypeScript React React Native NodeJS REST APIs GraphQL PostgreSQL MongoDB AWS Lambda S3 Amazon Cloudfront EC2 RDS Route 53 Stripe ExpressJS NestJS

React Lead Developer

Webshar

Oct 2024 - Mar 2025 (5 months)

Led development of production web applications using React.js, TypeScript, JavaScript, and modern application architecture. Took technical ownership of complex application modules from requirements and design through implementation, testing, and delivery.

React TypeScript JavaScript Component Architecture Code Review Performance Optimization Root Cause Analysis

Team Lead

Taskcraft Technologies LLP

Apr 2023 - Apr 2024 (1 year)

Led development of production web applications using React.js, TypeScript, Node.js, REST APIs, and modern JavaScript. Owned technical implementation of complex application features from requirements analysis through production delivery.

React TypeScript NodeJS REST APIs Architecture Code Review Mentorship Troubleshooting CI CD

Team Lead / Senior Software Developer

Thoughtwin

Feb 2020 - Mar 2023 (3 years 1 month)

Designed and developed production applications using React.js, TypeScript, JavaScript, Node.js, and REST APIs. Took ownership of application modules across the complete development lifecycle.