Luan Le

Senior AI Full Stack Engineer | SaaS, RAG, LLM, AI Agents

Based in Finland

Full stack engineer with three years of shipping production systems end to end, usually as the only technical owner, which means I have carried features from a vague business request through architecture, build, deployment, and the 7am phone call when something breaks.

My stack is TypeScript, React 19, Next.js, Node.js, Python, and PostgreSQL, with REST and API-centric architecture, Docker, and CI/CD pipelines that gate every merge.

On the AI side I have built agent systems into working products: multi-stage orchestration with routing and state, RAG retrieval over pgvector, schema-enforced validation at every boundary, adversarial critique loops, tiered model routing for cost control, and timeout, retry, and provider fallback so a degraded dependency does not take the system down.

Concrete results include an operational booking system handling 200+ reservations per month that cut customer booking time by over 50% and replaced a manual phone and email process outright, REST APIs verified against 1,000+ simulated transactions with predictable response times, and winning the Norrin Challenge at the Aalto AI hackathon with a seven-agent compliance system.

I am looking for a high-ownership role in a small team where I can shape architecture, work close to the people actually using the software, and see what it does in the real world.

Skills

• AI
• Next.js
• React
• TypeScript
• TanStack
• React Native
• Tailwind
• shadcn
• Node.js
• Python
• RESTFul API
• API integration
• C#
• .NET
• PostgreSQL
• MySQL
• SQLite
• MongoDB
• Redis
• pgvector

Hire Luan Le on FreddyWorks with milestone escrow settled in USDC on Polygon.