Siddharth M.

Senior AI Engineer | LLM Apps, RAG & Agents | 12 Yrs Full-Stack

Senior AI Engineer with 12 years of full-stack engineering behind me. Top Rated Plus on Upwork — 100% Job Success across 60+ shipped projects and 11,700+ billed hours. I'm not an AI engineer who learned to code last year. I'm a senior engineer who spent a decade shipping production SaaS — React, Node, Python, Postgres, AWS — and evolved into AI because that's where the hardest, most interesting problems are now. That foundation is why my AI projects actually ship to production instead of dying as demos. If you're building an AI product that needs to scale, handle real users, integrate with real systems, and not bankrupt you on OpenAI costs — that's the engineer you want. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ WHAT I BUILD - Custom LLM applications — OpenAI, Anthropic Claude, open-source models. Chatbots, copilots, document processors, classifiers, summarization tools, content generation pipelines. - RAG systems — retrieval-augmented generation over your private documents, databases, or APIs. pgvector, Pinecone, Qdrant. Tuned for accuracy, latency, and cost. - AI agents — multi-step agents that use tools, call APIs, and complete real work. LangChain, LangGraph, or custom orchestration when frameworks get in the way. - AI-powered SaaS — the full product, not just the AI piece. From schema design to React frontend to OpenAI integration to production deployment. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ RECENT PRODUCTION WORK - AI Invoice Processor — automated financial data extraction at scale. OCR + LLM pipeline. Processes thousands of invoices with structured output and minimal human review. - DatainsightAI — natural language interface over enterprise analytics data. Users ask questions, AI returns charts and insights. - Insight AI — meeting intelligence platform. Transcription, summarization, action item extraction, follow-up automation. - HotSpotSEO — production SaaS with AI-generated content pipelines, scheduled background jobs, and multi-tenant architecture. - Visoshare — AI video summarization and transcription product. OpenAI-powered, streaming responses, file upload pipelines. - Healthcare research SaaS — RAG over HCP, patient, and care- partner data. Multi-tenant on Auth0. Five product surfaces on a shared schema. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ THE EVOLUTION 2013–2020: Backend & full-stack engineer. Production SaaS in fintech, healthcare, e-commerce. Learned what "scale" actually means. 2020–2023: Senior full-stack on Upwork — Next.js, React, Node, Python, AWS. 60+ projects, 100% JSS, Top Rated Plus. 2023–today: AI engineer. Custom LLM apps, RAG systems, AI agents, AI-powered SaaS. Same engineering rigor, applied to the most interesting problem space in software today. The engineering didn't change. The interface did. Today the function call goes to OpenAI or Claude instead of just a database. The system around it still needs to be built right — and that's what most "AI developers" can't do. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ TECH I SHIP WITH AI: OpenAI, Anthropic Claude, LangChain, LangGraph, pgvector, Pinecone, Hugging Face, prompt engineering, function calling, structured outputs, evals, streaming. Backend: Node.js, NestJS, Python, FastAPI, PostgreSQL, MongoDB, Redis, REST, GraphQL. Frontend: React, Next.js (App Router), TypeScript, Tailwind, shadcn/ui. Infra: AWS, Vercel, Docker, Cloudflare, CI/CD. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ HOW I WORK The first 30 minutes are free. I'll tell you honestly whether your idea needs AI or just better software, what's actually buildable in your budget, and where the real risks are. If we're a fit, we move forward. If not, you've still got a clearer picture than when we started. I work as a senior engineer directly with you — not an account manager handing off to a junior. You communicate with me, I write the code, you ship the product. Available 30+ hours/week. Comfortable working async across US, EU, and APAC time zones. Ready when you are.