My portfolio

I’ve worked across a range of industries from aviation to real estate.
Most of my work isn’t public, but here are some projects I can talk about.

Donut

Crypto investment app

I helped Donut build their iOS app from scratch, all the way until App Store launch. Our tight-knit team was able to iterate quickly based on user research, while keeping the solid foundation that users expect from a financial app.

Highlights:

  • Banking integration
  • Composite animations
  • Rich, flexible design system
React Native GraphQL TypeScript

Jumu weltweit

Youth music contest hub

I built a web application and mobile apps for “Jugend musiziert” contests in 16 countries to replace heaps of paper forms and printed schedules, and help young people connect across borders through music.

Highlights:

  • Fully open-source
  • Drag-and-drop scheduler
  • Dynamic PDF generation
  • Handling of complex domain model
Phoenix GraphQL React Native

FriendHood

Urban activity app

As FriendHood’s CTO, I planned the tech architecture, wrote most of the app and server-side code, and participated in the UX and visual design process.

Highlights:

  • Polished app UI & UX
  • Cross-platform codebase
  • Real-time chat powered by GraphQL
React Native GraphQL Phoenix