I run Production Build, a software company in Frankfurt am Main. Think of me as your senior engineer on call: security, data protection and stability, explained in plain language. And when you need a web or mobile app built from scratch, I do that too.
One call, no sales pitch. You leave with an honest assessment and a clear next step, with me or without.
01 About
I've been building software for more than 20 years. I started with Perl, moved on to PHP and JavaScript, and today I mostly write TypeScript on the server and the client. With the rise of smartphones I started building apps too. I've built native iOS and Android apps, and today I use Flutter for both.
I use the same AI coding tools you probably use, every day. The difference is the judgement to check what comes out of them: types, tests, a clear architecture, and a review of everything before it ships.
Production Build is my company. I'm your contact from the first call to the last deploy. For bigger projects I bring in a network of trusted partners.
02 How I work
What working together looks like, from the first call to software you can rely on.
A free call. Where do you stand on security, data protection and architecture? What's the biggest risk you're carrying today? What would a concrete first step be?
Can someone get at your data once real customers are on it? Is personal data handled carefully? Does your deployment hold when the next feature breaks something that used to work?
Refactoring, automated build and deployment pipelines, code reviews and tests. Security updates, encrypted connections and securely stored passwords are part of the architecture from day one.
Honest answers in plain language, so you can make decisions about your own product.
With me or without, you'll know what to do next.
03 What I do
For small start-ups that built their product with AI tools and now need someone to judge whether it's secure, handles personal data carefully and is built to last. I review it, fix what matters first, and can stay on as your senior engineer on call.
From internal admin tools to products for end users, built alone or as part of your team.
Android and iOS, usually from one Flutter codebase, including the backend services behind it.
Architecture and development of backend and frontend, all in one hand.
Low-maintenance managed hosting, and Kubernetes when you actually need it.
04 Work
My own products live in production every day. That's where I learn what "production-ready" really takes.
A macOS app that shows what changed between Time Machine backups, keeps a version history for your files and restores without taking over the screen. There's no public API for Time Machine, so it builds on FSEvents, like Time Machine itself. The index and your file history never leave your Mac.
Free, unofficial fantasy football for the Swiss Super League, in German, French, Italian and English. Fantasy ice hockey for the National League is in preparation. To test the live-points engine, I replay a recorded real season through the production code path.
Free and open source (GPL-3.0). Use the hosted version or host it yourself. It only ever needs read access to your account.
A mobile puzzle game written in Dart, with a built-in AI player trained through reinforcement learning.
A Mastodon server on the fediverse. It's also where you'll find me, as @[email protected].
Client project
A young delivery start-up needed an MVP. I built it in Flutter for Android and iOS, together with the backend and a second app for drivers.
05 Writing
I write about what I learn while building, on my personal site.
Write a few lines about what you've built and what worries you. I'll get back to you personally. The free 20-minute review is available in German and English.
