Hasnaat K.

Your SaaS MVP should not become a fragile prototype that needs to be rebuilt after launch. I build secure, production-ready, scalable AI and web products for founders, startups and businesses. On recent projects: cut a client's AI API costs by 68%, dropped response latency by 80%, and took a site's Lighthouse score from 34 to all-green across every page. Send me your product brief, current stack, and the biggest technical blocker. I’ll review it and reply with a complete breakdown and the clearest next step within 4 hours :) Here's what clients say about me: ⭐⭐⭐⭐⭐ "I'm working with freelancers for over 12 years on all platforms and I never had such a great experience. He thinks and helps you like he's your real partner." Specializing in Full Stack Development and AI integrations, I deliver end-to-end product builds using Next.js, Node.js, Typescript, Python, MongoDB, Supabase, Stripe. I also handle AI integrations and AI powered features using Python, LangChain, and LLMs (OpenAI, Claude, Gemini). Whether you need an AI powered tool, SaaS applications, multi-tenancy, custom AI agents, chatbots, RAG pipelines or intelligent automation workflows, I turn your idea into a live product. I own the full pipeline: Concept → Planning → Architecture → Design → Development → Testing → Deployment. I can help with: ✅ Full Stack Development using React, Next.js, Node.js and TypeScript ✅ Converting an AI prototype into a reliable product ✅ REST API Development and API Integration ✅ Add useful AI features (agents, document search, RAG, automation, and chat) to your existing product or a new platform. ✅ Database Design (PostgreSQL, MongoDB, Supabase) ✅ Stripe, Payment Gateway Integration, Billing Systems ✅ Authentication and secure web platforms How I work: I prioritize clear communication, realistic timelines, and maintainable code. You'll receive: ✅ Clearly defined scope and milestones ✅ Regular progress updates ✅ Clean, documented, production-ready code ✅ Scalable architecture designed for future growth ✅ Reliable delivery and long-term support Core Stack: JavaScript • Next.js • React • Node.js • Python • TypeScript • Tailwind • MongoDB • PostgreSQL • OpenAI • Gemini • Claude • LangChain • RAG • Pinecone • AWS • Docker ---- Keywords: Full-Stack Developer · AI Engineer · Next.js Developer · Python Developer · Node.js Developer · TypeScript Developer · RAG Developer · LLM Integration · OpenAI API · Claude API · Gemini API · LangChain Developer · SaaS Developer · Multi-Tenant SaaS Architecture · Stripe Integration Developer · PostgreSQL Developer · MongoDB Developer · Supabase Developer · FastAPI Developer · API Developer · Performance Optimization Developer