Tanzeel ur R.

Full-stack developer and AI engineer. I build production-grade AI agents, LLM-powered SaaS platforms, and full-stack web apps. I worked on these projects in my recent Upwork history: → iFIT - AI-driven fitness platform serving 6M+ users, Led backend architecture for a high-scale web + mobile SaaS handling millions of daily active sessions. → Coursology - AI-powered EdTech SaaS agent trusted by 1M+ students (web, mobile, Chrome extension) → Intellitix - QR-based event ticketing SaaS, $1B+ in cashless transactions, 40M+ attendees → Cadenza AI - AI assistant for nonprofits, adopted by 500+ organizations → Augmentt - Cybersecurity SaaS for MSPs, raised $18M Series A → Total Dental Healthcare - Healthcare web + mobile apps + Chrome extension across 13 locations What I build for clients: AI Agents & LLM Applications RAG pipelines, multi-agent systems, AI chatbots, and LLM-powered workflows using LangChain, LlamaIndex, OpenAI API, and Anthropic Claude. Systems that work in production — not prototypes. Full-Stack Web & SaaS Development End-to-end SaaS platforms and web applications using Next.js, React, Node.js, Python, and FastAPI. From MVP to scaled product with real users. Machine Learning & AI Integration Custom ML models, NLP pipelines, and AI feature integration into existing products. If you have a SaaS or web app and want to make it intelligent, this is the lane. Tech stack: - Frontend: Next.js · React · TypeScript · Tailwind CSS - Backend: Node.js · Python · FastAPI · Django · Express · NestJS - AI/ML: LangChain · LlamaIndex · OpenAI API · Anthropic Claude · RAG · LLM fine-tuning - Databases: PostgreSQL · MongoDB · Pinecone · Redis - Cloud: AWS · Docker · CI/CD · Vercel If you're building an AI agent, LLM app, SaaS product, or full-stack platform, send me the brief. Reach out to schedule a call on Upwork