David Lin

🚀 𝗙𝘂𝗹𝗹-𝗦𝘁𝗮𝗰𝗸 𝗔𝗜 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 𝘄𝗵𝗼 𝗯𝘂𝗶𝗹𝗱𝘀 𝗟𝗟𝗠 𝗮𝗽𝗽𝘀 𝘁𝗵𝗮𝘁 𝘀𝗵𝗶𝗽 𝗮𝗻𝗱 𝘀𝘁𝗮𝘆 𝗿𝗲𝗹𝗶𝗮𝗯𝗹𝗲.
Based in the United States, I work across the stack: Next.js and TypeScript on the frontend, Python and Node services on the backend, and production LLM features including RAG, agents, streaming, and automation.
I take AI products from a rough idea or prototype to something users can depend on. That means clean APIs, grounded retrieval when documents matter, clear failure handling when models misbehave, and a codebase the next engineer can read without guessing.

🛠️ 𝗪𝗵𝗮𝘁 𝗜 𝗖𝗮𝗻 𝗗𝗼 𝗙𝗼𝗿 𝗬𝗼𝘂:
• ⚡ 𝗟𝗟𝗠 𝗔𝗽𝗽𝘀 & 𝗥𝗔𝗚: Design and build retrieval-augmented systems, document Q&A, and assistant features with streaming responses, evaluation hooks, and practical cost control.
• 🤖 𝗔𝗴𝗲𝗻𝘁𝘀 & 𝗔𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻: Implement tool-calling flows, multi-step workflows, and backend jobs that connect models to real APIs and data.
• 💻 𝗙𝘂𝗹𝗹-𝗦𝘁𝗮𝗰𝗸 𝗗𝗲𝗹𝗶𝘃𝗲𝗿𝘆: Ship Next.js frontends, typed APIs, auth, and data models so the AI layer sits inside a complete product, not a side demo.
• 📊 𝗘𝘃𝗮𝗹𝘂𝗮𝘁𝗶𝗼𝗻 & 𝗥𝗲𝗹𝗶𝗮𝗯𝗶𝗹𝗶𝘁𝘆: Add basic metrics, logging, and regression checks so changes to prompts or retrieval can be judged against real behaviour.
• ⚙️ 𝗣𝗿𝗼𝗱𝘂𝗰𝘁𝗶𝗼𝗻 𝗘𝗻𝗴𝗶𝗻𝗲𝗲𝗿𝗶𝗻𝗴: Deployments, environment setup, CI-friendly structure, and handoff documentation for ongoing ownership.

🎓 𝗣𝗿𝗼𝗳𝗲𝘀𝘀𝗶𝗼𝗻𝗮𝗹 𝗕𝗮𝗰𝗸𝗴𝗿𝗼𝘂𝗻𝗱:
• Full-stack AI delivery for startups and product teams shipping LLM features into live products.
• Hands-on work with Next.js, TypeScript, Python, RAG pipelines, and service integration.
• Experience moving prototypes into monitored, maintainable production paths.

📬 𝗟𝗲𝘁’𝘀 𝗖𝗼𝗻𝗻𝗲𝗰𝘁: Send a short description of your product, stack, or goal. I will reply with a practical technical approach and what is needed to execute it.

🎯 𝗞𝗲𝘆𝘄𝗼𝗿𝗱𝘀: Full-Stack AI Developer, LLM Applications, RAG Systems, LangChain, Next.js, TypeScript, Python, FastAPI, AI Agents, Streaming AI, Vector Search, Production AI, SaaS AI Features, Document Intelligence, Prompt Engineering, REST APIs, PostgreSQL, AI Automation, Full-Stack Development, Model Integration