Available for interesting work · Vietnam

Hi, I'm dongquoctien — a full-stack developer building scalable systems and AI tooling.

I design and ship products end-to-end: web apps, MCP servers that connect AI agents to real systems (Microsoft 365, Bitbucket, Grafana, Redmine, MySQL), browser extensions, and the occasional embedded project. I write here about what I learn along the way.

• Bridging Figma and Jira from a Chrome extension: what Manifest V3 makes hardMay 12, 2026

  QA Annotator picks DOM elements, resolves the nearest Figma frame, and files Jira issues — all from a Chrome extension. The interesting parts are the ones MV3 fights you on.

• What I got wrong in my first three MCP serversMay 12, 2026

  Six MCP servers later, I look back at the design mistakes I made early on — REST-mirroring, bad tool descriptions, context bombs — and what I do differently now.

• Why I stopped fighting MyBatis and started liking itMay 12, 2026

  Notes from a year on a hotel system running Spring Boot + MyBatis + Elasticsearch. The XML mapper aesthetic is unfashionable; the trade-offs are real.

• Hello from the new siteMay 10, 2026

  I retired a chat-UI demo and replaced it with a proper portfolio + blog. Here's what changed and why.