Frankfurt am Main2026
Hexese is the software studio of Aaron Kuyucu in Frankfurt am Main. It builds apps, servers and websites for businesses and people who spend more time on forms and deadlines than on their actual work.
Hexese starts trading on 1 September 2026. One person, as a side business.
Measured — after every build
01Services
Six kinds of work. Each of them sits finished in at least one of the projects below. Nothing on this list is an intention.
One codebase, both platforms (React Native). Camera and file import, accounts, payment handling, states for a poor connection. So far only the iPhone build has been run.
amtsorakel/src/ — about 8,000 lines of TypeScript/TSXNo store account, no installable build.Postgres with access rules per row. Counters that stay correct even under simultaneous requests. Webhooks from other providers may arrive twice and out of order without doing damage.
supabase/migrations/0001–0006, in particular 0003 and 0005No second environment, no Terraform, no Kubernetes.Answers in enforced JSON, checked field by field, instead of free text. Cost ceilings, time limits, retries only where they help — and a measuring setup of my own that compares every change against the previous state.
supabase/functions/analyze-letter/index.ts, 786 lines · scripts/eval/, 717 linesStatic pages that load nothing when opened: their own typeface from their own server, security headers, fully usable without JavaScript. This page is one of them — the figures above prove it.
scripts/schrift-bauen.py · public/.htaccess in every built siteFor every promise a check script that measures the built result rather than the source. If it finds a breach, nothing goes online. What cannot be measured is not promised — that is the more uncomfortable half of the rule.
scripts/messwerte.mjs · scripts/csp-hashes.mjs · aufmass/…/pruefen.shNo automated test suite. Measurement happens on the built result.Deletion that really deletes. Servers located in Germany. As little data as possible, from the first migration on — which column never exists at all is the one question that cannot be reopened later.
supabase/functions/delete-account/index.ts · RLS in migration 0001Implementation, not legal advice. Auditing myself qualifies me for no one else.02Projects
In order of maturity. The tag next to each says where it really stands.
An app for the phone. You photograph a letter from a public authority, the app gives it back in plain German, records the deadlines named in the letter and reminds you of them in time.
Product page: amtsorakel.dePhotos of a building site are meant to become a set of measurements — instead of a notepad, a folding rule and an hour of typing them up in the evening.
Hexese builds tools for work in which forms, deadlines and paper hold up the actual work. Which one comes next is decided by whoever has the problem. If you know of one: write to me.
Around the world every ninety minutes. An official letter takes longer to reach you — and you usually take even longer to find your way back.
03Person
My name is Aaron Kuyucu. I am a student, and I write the software of Hexese myself — every line, from the database to this page. Hexese is a sole proprietorship in Frankfurt am Main, registered as a side business on 20 August 2026, starting work on 1 September 2026.
I build tools for procedures I know myself: a letter you read four times and still do not know whether anything needs doing. A set of measurements that still has to be typed up in the evening. Neither is an accident or carelessness; both are built in. That cannot be changed from the inside. Building tools for it can.
04Questions
Apps for the phone, servers and websites — for businesses and people who spend more time on forms and deadlines than on their actual work.
Aaron Kuyucu. Hexese is a sole proprietorship in Frankfurt am Main, run part-time, in business since 1 September 2026. Every line of software comes from one person.
An email to info@hexese.com is enough: what you have in mind, in two or three sentences. Follow-up questions come by email, usually within a few working days. No form, no call-back slot, no sales pitch.
React Native and Expo for apps, Supabase with Postgres for server and database, TypeScript throughout, Next.js for websites like this one. Each project lists the file path where it lives.
No clients yet — Hexese is new. What exists is finished work you can measure me by: Amtsorakel, further up this page.
Nothing. No cookies, no analytics, nothing from third-party servers. The figure “0 third-party requests” above is recomputed after every build. The rest is in the privacy policy.
05Contact
A plan, an enquiry, a procedure in your business that eats too much time — or a note about this page. An email is enough. I read every one.
Frankfurt am MainUsually an answer within a few working days
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