Things I’ve built and keep running.

AI-powered platform that turns booking data from Airbnb, Booking.com and WhatsApp into a daily operational briefing for short-term rental hosts.

Vietnamese marketplace and data platform for trading game accounts and gaming services, with market price tracking, top-ups and free tools for gamers.

Ready-made Google Sheets and Excel templates with pre-written formulas for small businesses, covering payroll, invoicing, rentals, students, leads and projects.

A self-extending AI agent. When no installed skill fits a request, it researches the problem, writes a skill, tests it in a sandbox until it passes, installs it, and reuses it next time.

A three-tier agentic planning system that turns a vague goal into a structured, executable program, a “compiler for human intent”.

A CLI that reviews any GitHub, GitLab or Bitbucket pull request by actually running the code (imports, tests, edge cases) in a sandbox, then posts inline review comments.

A versioned registry and selection API for agent tools. Instead of showing a model every tool, it returns a small, permission-checked, semantically ranked shortlist per request.

Java crawler system that collects product data and tracks prices across e-commerce platforms worldwide, powering deals and coupons on ViCoupon.com.

Fine-tuned GPT-2 on a news dataset for conditional text generation, covering tokenization, training with Hugging Face Trainer, and evaluation.

Job-sharing platform that uses machine-learning recommendations to improve job matching and networking, with a React Native app, a web client and a Node.js / NestJS backend.