Projects

Sorted by relevance to the work I do today. Own apps at the end.

Megunto app: course overview and exam question with voice input

Megunto

The app version of an existing exam-prep platform for doctors and medical students, with AI-assisted evaluation – for iOS, Android and web.

Flutter (Android/iOS/Web)
REST API (OpenAPI)
Auth0
Stripe

Kiezpass

A marketplace for restaurant and bar deals in Berlin – my own company, sold in 2025.

Flutter (Android/iOS/Web)
Firebase
Stripe

Twiggli app: full-screen event feed and search with filters for category, date and price

Twiggli

An events and experiences platform whose FlutterFlow app couldn't get through store review – live in both stores within a month.

Flutter (Android/iOS)
FlutterFlow
Firebase
Stripe

Vattenfall
Deutsche Bahn
Porsche
Swiss Re
Lidl
Bayer 04
Burda Verlag
GU Verlag

Appsfactory – seven years in an agency

Backend, CMS and tech lead for Vattenfall, Deutsche Bahn, Porsche, Swiss Re and others.

.NET
Azure
Xamarin
Flutter

Own apps

Kiezwerk app: map of places to work in Berlin, detail view of a café and an active check-in

Kiezwerk

A map of the places in Berlin where you can work on a laptop – with everything that decides a working day.

Flutter (Android/iOS)
Riverpod
Firebase

Hoop-Fit app: animated move, home screen with the 21-day program and a running workout with the coach

Hoop-Fit

Hula hoop training as an app – with 89 animated moves, workouts with a coach who speaks and a rotation counter that uses the motion sensors.

Flutter (Android/iOS)
Firebase
RevenueCat

All Aboard app: trip overview with fellow travellers and expense settlement

All Aboard

A shared workspace for group trips: planning, photos, documents and expense settlement.

Flutter (Android/iOS)
Firebase
OpenAI

Banana List app: onboarding, list overview and shared shopping list

Banana List

A shared checklist app that had to feel faster than anything else on the market.

Flutter (Android/iOS)
Firebase