Sujay Singh

Meet Sujay

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I build fast, production-ready web products and AI-powered applications — from pixel-perfect Next.js frontends to FastAPI/Node backends and LLM features that actually ship.

4.5 years of hands-on experience · 20+ websites shipped · consistent 98+ Lighthouse scores.

WHAT I CAN BUILD FOR YOU
• Marketing sites & landing pages — Next.js, Tailwind, Framer Motion/GSAP, SEO and performance tuned
• Full-stack web apps & MVPs — React/Next.js + Node.js/Express or Python/FastAPI, PostgreSQL, auth (JWT/RBAC), dashboards
• AI features & GenAI apps — RAG pipelines, document chat, LLM content generation, LangChain/LangGraph agents with OpenAI, Claude or Gemini
• Performance & SEO rescue — taking slow React/Next.js sites to 90+ Lighthouse

RECENT WORK
• Trikaya.io — AI + blockchain hiring platform (Next.js, TypeScript), 98+ Lighthouse, <2s TTI
• AI-powered publishing platform — Next.js + FastAPI + PostgreSQL with LLM-assisted writing, JWT auth and role-based access
• RAG PDF chat — document Q&A with LangChain, embeddings and FAISS vector search
• TestKart — EdTech marketplace frontend with SSR and 3 role-specific dashboards
• 20+ marketing and campaign sites, delivered on time

EXPERIENCE
Independent Full-Stack & GenAI Engineer (2025–present) · Frontend Developer at KALP Digital / MAI Labs (2022–2025)

STACK
TypeScript, React, Next.js, Redux/Zustand, TanStack Query, Tailwind, ShadCN · Node.js, Express, Python, FastAPI, Prisma, SQLAlchemy, PostgreSQL, MongoDB · Docker, AWS (EC2, S3, ECR), GitHub Actions, Vercel, Railway · LangChain, LangGraph, OpenAI, Claude, Gemini, FAISS

HOW I WORK
Clear scope up front, regular progress updates, clean typed code you can maintain, and tested deployments.

WORKING HOURS
Based in Varanasi, India (IST, UTC+5:30). Available 12 PM – 9 PM IST:
• UK: 6:30 AM – 3:30 PM (7:30 AM – 4:30 PM in summer)
• Central Europe: 7:30 AM – 4:30 PM (8:30 AM – 5:30 PM in summer)
• US Eastern: overlap until about 10:30 AM, with calls in your morning by arrangement

Have a project in mind? Send me a message with what you're building — I usually reply within a day.