Seoul · --:--:-- · usually replies within 24h
Web, mobile and AI products for a fixed price. If it takes longer than I quoted, that is my cost. Scope it yourself with the calculator.
2024 to now
A family food inventory app: scan a label or receipt, and expiry dates, ingredients and allergens land in a shared list. On both stores since 2024, with a release most weeks.
Read the case
Example build · fictional business
Precision machining · Siheung
A control-panel readout shows the process you are looking at, and sending a drawing tells you when the quote comes back.
Example build · fictional business
Tax & bookkeeping · Mangwon-dong
One ledger line that dips at every filing deadline, with a fee table and a month-by-month to-do list.
You send me a rough idea. Within a day I reply with a scope, a fixed price and a delivery date. If the estimator on this page already fits, that reply is a confirmation rather than a negotiation.
Half is due up front and half on delivery. You get a staging URL in the first week and a written status every working day. When a build runs long, that is my cost and never a change order.
On launch day the repository, the design files and every account move to you. Nothing is licensed back and there is no retainer to keep it running. Thirty days of fixes after launch are included.
Every message you send lands with the person who writes the code.
There is no handoff from a salesperson to a developer, so nothing is lost in between.
It also means I take a few projects at a time and turn down the rest.
Two demos with a sample exchange you can read right now. A character that remembers you across a conversation, running on a Postgres database inside the browser, and a support bot that answers from a document set. The live trial opens on request.
Open the playgroundSample exchange
I come in every Tuesday before work.
Tuesday mornings, noted. The pour-over takes four minutes, so order at the door and it lands as you sit down.
What the database wrotememories | preference | comes in Tuesday mornings before work | 0.82
Live trial on request
Every message in this demo calls a model and costs money, so the live version opens on request. Below is a real exchange from it. Ask for a trial code and you get one back the same day.
Send me two paragraphs about it. I reply within 24 hours, Seoul time, with a price and a date.
Email me