Full-stack engineer (TypeScript) based in South Korea (KST), working remotely with teams worldwide.

I build web and mobile products end to end: React / Next.js / React Native on the front, Node.js / NestJS / Python serverless on the back, PostgreSQL and AWS underneath, and LLM features where they actually help users. I've shipped products as a solo founder and as part of remote teams.

• TubeLingo (founder): a language-learning app for iOS, Android and web that turns YouTube videos into interactive lessons. 5,000+ users, paid subscriptions, a real-time AI voice tutor (STT → LLM → TTS), and LLM-generated push notifications measured against a holdout group. React Native (Expo), Next.js, Hono, PostgreSQL, Cloudflare, OpenAI
• Simply French (founder): AI-powered French-learning platform focused on conversation, with pronunciation scoring and an AI writing tutor. 1,150+ users.
• Meetda AI: full-stack on a third-party risk management SaaS: a vulnerability-scanning pipeline across three services, and a migration from Railway to AWS (EventBridge Scheduler + ECS). Next.js, NestJS, MySQL, AWS

• Sellpoint (remote): React frontend for a cloud ERP used by small retailers and manufacturers. React, React Query, Redux, Material UI, AWS Lambda (Python), DynamoDB
• EMPLABS & 0xSeoul (remote): NFT minting platforms and custom Solidity contracts; shipped 4 client launches. React, Next.js, TypeScript, Ethers.js, Solidity

Languages: TypeScript, JavaScript, Python, SQL Frontend: React, Next.js, React Native (Expo), React Query Backend: Node.js, NestJS, Hono, AWS Lambda Data & infra: PostgreSQL, MySQL, Supabase, DynamoDB, AWS (Lambda, ECS, Step Functions, EventBridge), Cloudflare, Docker, Vercel AI: OpenAI / LLM APIs, Whisper, real-time voice pipelines, Claude Code + MCP

Most of my recent work lives in private repositories. I'm happy to walk through code on request.

• LinkedIn: linkedin.com/in/abe-han-25b8b320b
• Email: hanjk13262@gmail.com

Open to remote full-stack roles.