Deepayan M.

Need an AI agent or RAG chatbot that works reliably beyond the demo stage? I build production-ready AI agents, knowledge-base chatbots, and LLM automation systems using Python, Golang, LangChain, FastAPI, and modern vector databases. I have 10+ years of software engineering experience, 100% Job Success on Upwork, and recent 5-star work delivering a RAG-based chatbot for sales, support, and lead capture. I can help you build: • AI agents and multi-agent workflows • RAG chatbots over PDFs, websites, internal documents, and structured data • Customer-support and lead-qualification assistants • OpenAI, Claude, Gemini, and OpenRouter integrations • Tool calling, memory, routing, guardrails, and structured outputs • AI research, crawling, extraction, and enrichment pipelines • Vector search with Pinecone, Weaviate, FAISS, and ChromaDB • Production APIs with FastAPI, Python, Golang, REST, gRPC, and WebSockets • Dockerized deployment, monitoring, evaluation, cost controls, and performance optimization Recent systems I have developed include: • A multi-tenant RAG customer-support platform with citations, streaming, analytics, an embeddable chat widget, and human-agent handoff • An agentic grant-intelligence platform that discovers official sources, crawls websites and PDFs, evaluates eligibility, and produces structured listings • A conversational grant-discovery assistant that extracts user interests and locations, searches structured data, answers through RAG, and maintains context • Multi-stage LLM pipelines with validation, retry handling, audit trails, model routing, token controls, and per-run cost safeguards Why work with me: • Production-focused engineering—not disposable AI demos • Clean, tested, maintainable, and documented code • Clear communication and dependable progress updates • Careful attention to security, reliability, scalability, latency, and cost • End-to-end support from architecture and prototyping through deployment Send me your goal, current stack, and biggest technical challenge. I’ll recommend the most practical path to a reliable working solution.