Tanzeel ur R.

Full-stack developer + Hands-On AI/ML Engineer | I Build LLM Apps, RAG Systems & AI Agents (MCP, LangGraph) | Python, AWS, GCP, Azure

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