X65 Studio · Taipei · Available for projects
We design and build the software small businesses run on — websites, internal tools, apps for phones and tablets, smart TV apps, and the other systems that keep operations moving.
The thing your team currently does in a spreadsheet, a group chat, or on paper. We turn it into software that fits how they already work.
Flutter · REST & WebSocket APIs · SQL · Firebase
One app that runs everywhere your business needs it — a phone in someone's pocket, a tablet on the counter, a screen on the wall.
Flutter · Melos monorepo · Hive offline cache · CI/CD
A public site, plus the admin your own staff use to change it. Saving publishes — no engineer in the path.
Next.js · React · Tailwind CSS · content admin · Cloudflare R2 · ISR
The layer holding an app up: APIs, databases, live connections, and wherever those actually run.
Fastify · ASP.NET C# · Rust · Go · PostgreSQL · Redis · WebSocket · GCP Cloud Run · Docker · Sentry
Repetitive, time-consuming work is automated while the judgement calls stay with a person. Anything that calls a model runs under a spending cap.
Node.js · Claude API · structured output · cost guardrails
04 · Work — 01
Calling the next patient meant a nurse leaving the consulting room to say the name across the waiting area. Clinics with a ticket display had the number and nothing else, and notices still went up on paper.
The display combines queue calling, health video playback and digital notices. The number comes from either the clinic's third-party HIS or our own admin, and pushes to the dispenser, the wall screen and the ticker at once. The current number is also published online.
Flutter · Melos monorepo · Fastify · React admin · PostgreSQL · Redis · WebSocket · Hive offline cache · HIS integration · GCP Cloud Run · CI/CD
04 · Work — 02
A system running across hundreds of sites produced more crash reports than anyone could read, and sorting them by hand cost a morning. The paid tool that summarised them billed for everything it read, and the bill grew with the site count.
The triage tool filters device and network noise with plain rules first, then sends only the plausibly fixable bugs to a model, under a spending cap and behind a fingerprint cache so the same crash is never paid for twice. It is open source and runs against the 400-site system.
Node.js · SQLite · Sentry API · structured LLM output · cost guardrails
04 · Work — 03
A corporate site for the distributor of an international simulator brand. It carries four kinds of content — the brand, client stories, news and dealer locations — and the last two keep moving.
The public site and the admin were built as one job. The site renders through ISR, so it loads at static speed and still reflects current content; the admin is a full content system with a rich text editor, image uploads and create-edit-delete screens for every resource. Images are hosted on Cloudflare R2, the admin is protected by NextAuth, and every API route that writes verifies a JWT.
Next.js · React · Tailwind CSS · Prisma · Neon · NextAuth · Cloudflare R2 · ISR
04 · Work — 04
A vocabulary app, built for the words you learn and then forget.
Photograph a page and AI turns the notes into flashcards in seconds. SM-2 spaced repetition puts a card in front of you at the moment you are about to forget it, so what you learned makes it into long-term memory. Local-first and usable offline, syncing across devices once you sign in, with ready-made decks in the marketplace. It is on the App Store.
Flutter · Riverpod · Cloudflare Workers · D1 · R2
01
The first call establishes the scope of the problem, its size, and how we would solve it. Meetings are arranged in your timezone. You get a dedicated point of contact.
02
Before any work starts we put what is being built, what is not, and what it costs into a document you approve. The quote and the final acceptance both follow it.
03
You get a private link at the start of the project showing the stages, where we are, and every update as it happens — no login needed. Each stage also ends with a written report. Stages run from one week to three.
04
The project is split into milestones with a visible result, each invoiced on delivery through Wise. You can stop at the end of any stage and keep what you have paid for.
05
Source code and intellectual property transfer to you on final payment. Delivery includes the repository, the deployment setup and documentation, so the work can change hands at any point. If you would rather we kept looking after it, maintenance and hosting are available separately.
Meetings are arranged in your timezone. Messages are answered within two working days.
After the first call we put the scope in writing: what is being built, what is not, and where the variables are. The quote follows that document and is priced by milestone. Where the scope is still unclear, we propose a paid assessment first.
By milestone, through Wise, invoiced as each one is delivered. A project is usually three to five milestones. W-9 available for US clients.
Adjustments within the agreed scope are not billed separately. Where a request changes what is being built, we set out the effect on time and cost, and start once you approve it.
Yes. Send yours over and we will review it and sign. Tell us at the start if the project should stay out of our work section.
Everything transfers to you on final payment, source code and intellectual property, with no licence retained. General-purpose open-source tooling that predates the project is the exception and keeps its own licence.
We can stay on for maintenance — fixes, small changes, dependency and platform updates — billed separately, either monthly or per request. You can also just call us when something comes up. Server setup and hosting on Google Cloud is available the same way, or you can keep it with your own team.
Tell us what you want built, or where things are stuck. We reply within two working days.
