I keep a telecom app running by day, and build sharply scoped tools on my own hardware at night.
Five of these are running right now, on a single board computer under my desk or on a free tier. The other three are finished and unpublished.
Splits a Thai restaurant bill the way people actually eat, with dishes shared across the table by default.
Service charge and VAT are applied in the order a real Thai bill applies them, prorated by consumption. Tests assert every share sums to the exact total.
A household document vault. People are rows, document types are columns, and any document is two clicks away.
Nothing is ever deleted. A renewal supersedes the old copy, because a family archive that can lose things is not an archive.
A Telegram bot that logs Thai meals, weight and workouts, estimates macros, and sends a weekly chart.
The language model only parses input. Every value it returns is revalidated before storage, and the bot still works with the model switched off.
A JLPT study system from N5 to N2. Set a target level and an exam date, and it paces the work backwards from there.
Nothing is tested before it is taught. An unseen item is introduced on a card that asks nothing first.
A Go command that pings my services, checks container health over SSH, and writes a daily summary of what changed.
It messages me only when something is wrong. A monitor that reports success every ten minutes trains you to ignore it.
One button that answers what to eat. Filter first, so every result that comes back is already acceptable.
Every nutrition number shows where it came from, whether estimated, borrowed from a similar dish, or edited by you.
Checks Thai government lottery tickets against any draw going back to 2022, with no backend at all.
Neighbour prizes wrap, so first prize 999999 makes 000000 a winner. A naive plus or minus one silently denies a real payout.
Shortens a link and draws its QR code, stripping tracking parameters before it does either.
The QR encoder is bundled rather than loaded from a CDN, so the page keeps working with no network and nothing leaves the browser.
Computer Engineering at Chiang Mai University, production operations for a Thai telecom, and a competitive programming habit that peaked at first in the country.