Amitoj Singh A.

I build AI agents and full-stack products that work in production — not demos that break on real data. Over 5+ years I’ve shipped software across startups, agencies, and direct client work: an AI customer support platform, subscription SaaS products, ecommerce and returns systems, booking platforms, and event sites with payments. Thousands of hours of that work has been right here on Upwork. Most recently, I was an AI engineer at a Y Combinator-backed startup, where I helped grow the product from $40K/month to $1M+ ARR. We built AI agents that resolved customer support tickets on their own for B2B SaaS companies — so I’ve done the hard parts most AI freelancers skip: RAG on messy knowledge bases, hallucination guardrails, evals, and integrations with Slack, Zendesk, Jira, and Confluence. Before that: agency work serving multiple clients at once, where I learned to scope fast, communicate clearly, and ship on deadlines. Plus multiple national-level programming competition wins. HOW I CAN HELP: ✅ AI agents & chatbots — Custom agents trained on your docs and data. They answer accurately, take actions in your tools, and hand off to humans when needed. ✅ AI automation & consulting — I’ll review your workflows, tell you honestly what AI can and can’t do for you, and build what makes sense. ✅ Full-stack & mobile development — I’ve shipped complete products end to end: frontend, backend, database, payments, and deployment. ✅ Security-minded — Certified in penetration testing and security fundamentals. Important when AI agents touch customer data. Clients rehire me because I scope honestly, communicate clearly, and deliver on time. TECH STACK: 🤖 AI/LLM: Claude, GPT, RAG, LangChain, vector databases, prompt engineering, evals 🖥️ Frontend: React, Next.js, TypeScript, Redux ⚙️ Backend: Python, Node.js, Go, Rust 📱 Mobile: Flutter, React Native 💾 Databases: PostgreSQL, MongoDB, MySQL ☁️ Cloud & DevOps: AWS, Azure, CI/CD, Terraform, Git