RuffLogix
Building intelligent systems, experimental software,
and high‑performance digital experiences.
About
Independent software engineer and AI researcher based in Bangkok. Currently at KBTG, Agoda, and Khui AI, building LLM-powered systems with MCP and Temporal.io. Formerly at LINE MAN Wongnai, and Looloo Technology - across federated learning, speech AI, backend systems, and smart contracts.
Computer Engineering student at Chulalongkorn University. Super AI Engineer Season 5 · iGEM 2024 Silver · TOI Thailand 2020/2021.
Full backgroundFocus Areas
Selected Work
All projectsA learning management platform where courses are assembled from composable "blocks" — Lego-like pieces (text, video, quizzes, code, and more) that instructors snap together to build lessons. Aimed at flexible, hands-on course authoring.
A self-hostable online judge embedded in the RuffBlitz LMS for programming and algorithms courses. Compiles and runs Python/C/C++ through a sandboxed execution engine (Judge0 → isolate) driven by horizontally-scaled judge workers, with role-based access (admin/staff/student), group-gated problem visibility, ICPC/IOI-style contests with scoreboard freeze, subtasks and testlib checkers. Built on Next.js + Elysia (Bun), PostgreSQL/Drizzle, and Redis/BullMQ.
A lightweight ordinal image classifier that grades urine color on a 5-point scale (Clear → Very Dark) as a coarse hydration proxy, built for CPU inference. Treats the ordered classes as ordinal regression (class-weighted CE + Squared-EMD loss), with color-preserving augmentation, effective-number class balancing, and a held-out + 5-fold stratified protocol. Reaches QWK 0.963 on the test set with 100% adjacent accuracy — every error is off-by-one — while a trivial color+GBM baseline matches ~98% of it, making the efficiency case for tiny deployment. Delivered as a LINE chatbot via the LINE SDK and Messaging API, so users get a hydration reading by sending a photo in chat. Not a diagnostic tool.
Research Philosophy
Every abstraction earns its place. Every line justifies itself.
Systems designed to bend without breaking under real-world pressure.
The frontier matters. Running experiments where answers are unknown.
Software as a discipline — executed with the rigour of a craft.
" The best systems feel inevitable in hindsight —
rigorous craft disguised as simplicity.
Writing
All postsช่วงนี้ ถ้าใครได้เลื่อนดู shorts หรือ reels ก็คงจะเห็นโปรเจคแนว ๆ นี้กันบ้าง ที่เป็นคนเปิดกล้องแล้วทำท่า “six seven” หลังจากนั้นก็…
เนื่องจากวันก่อนผมได้เจอบทความของรุ่นพี่ที่เล่าเกี่ยวกับวิชาเลือกในภาค ซึ่งช่วยผมได้เยอะมากในการตัดสินใจเลือกลงวิชาเลือก… Continue…
In the last few days, I’ve started learning game development in Go using the Raylib library, which is an easy and simple-to-use li…