Full Stack Engineer (React, Next.js, TypeScript, AI Integrations)
📍 Bengaluru, India | 🌍 Open to Remote & Contract Roles

I’m a Full Stack Engineer with 5 years of experience building high-performance, scalable web applications. I specialize in React, Next.js, frontend performance optimization, A/B experimentation, and AI-powered SaaS products.

I enjoy building products end-to-end — from idea to production — with a strong focus on performance, usability, and measurable impact.

Languages
JavaScript (ES6+), TypeScript, Node.js, Python

Frontend
React, Next.js, Redux, React Query, SWR, Tailwind CSS, Shadcn, Vue

Backend & Databases
Node.js, Express, FastAPI, Flask, PostgreSQL, MongoDB, Prisma, Supabase

Cloud & Serverless
AWS Lambda, DynamoDB, Serverless Framework, Firebase, Vercel

Performance & Experimentation
Core Web Vitals, Lighthouse, Code Splitting, Lazy Loading, Optimizely, A/B Testing

Concepts
Microservices Architecture, RESTful APIs, WebSockets, System Design, GraphQL, CI/CD, Agile Development, Git

• Build high-performance React & Next.js applications
• Improve Core Web Vitals & Lighthouse scores
• Design and run A/B & MVT experiments with real business impact
• Develop AI-integrated SaaS products using OpenAI APIs
• Architect serverless & scalable backend systems
• Ship clean, production-ready features fast

• Led A/B and multivariate experiments using Optimizely and React, driving 6–8% conversion uplift
• Built reusable React hooks and experimentation frameworks, reducing setup time by 40%
• Improved frontend performance and stability, reducing load time by 25%
• Delivered major UI revamps that increased user engagement by 18%
• Integrated GA4 and analytics pipelines for accurate experiment tracking

• Improved Lighthouse scores from 20 → 90+
• Reduced initial load time by 45% using lazy loading and bundle optimization
• Eliminated CLS issues and improved Core Web Vitals across key pages

• Reduced bundle size by 40% using tree-shaking and code splitting
• Built internal dashboards with Vue.js, improving operational efficiency by 60%
• Designed and deployed serverless systems using AWS Lambda and DynamoDB

AI-powered technical assessment and certification platform built with Next.js, Prisma, Supabase, Cashfree Payments, and OpenAI APIs.
Features include timed assessments, topic-wise analytics, automated scoring, and certification workflows.

TopScholar (http://topscholar.xyz/)

A trend discovery platform built with Next.js, MySQL, and Prisma to identify real-time trending keywords and tags.

TrendingTags (https://www.trendingtags.io/)

A mobile social app built with React Native, GraphQL, MongoDB, Express, and Firebase, focused on performance and clean UI.

Feelin (https://www.linkedin.com/pulse/development-feelin-v3-amit-kumar-singh/)

• MBA (IT) – Ranchi University
• BBA (IT) – Ranchi University
• YC Startup School Graduate (2019)
• FOSSASIA OpenTech Nights Winner (2018)
• Open-source contributor (Mozilla, eLife)

• 💼 LinkedIn: https://linkedin.com/in/ioamitsingh
• 📧 Email: amitsin6h@gmail.com

⭐️ I’m currently open to remote full-time, contract, and freelance opportunities.
If you’re building a SaaS product or need help with performance, experimentation, or AI integrations — let’s talk!