Client Work

Selected client work and products I've helped build. Each project highlights a different part of my mobile, web, and platform engineering experience.

piparo.party

Built an offline-first party-game product with 25 games, 22 languages, native subscriptions, a multilingual website and a growing local multiplayer platform.

React Native Expo TypeScript Product Development

Porsche Digital

Fullstack contributions to a consumer-facing mobile app with real-time video, in-app subscriptions, and a serverless AWS backend.

React Native AWS CDK TypeScript Fullstack

SAP / KulturPass DE

Contributed to the KulturPass mobile app, a German government initiative providing 18-year-olds with a cultural budget.

React Native Redux Toolkit TypeScript DevOps

Stroeer / t-online

Contributed to the t-online news mobile app, built on React Native and Expo, across navigation, search, push notifications and monetization.

React Native Expo TypeScript DevOps

ABL

Contributed to the ABL Configuration App for EV wallbox setup and management, including device communication over WiFi/Bluetooth, firmware updates and multi-language support.

React Native MobX TypeScript IoT

IBM iX / Barmer

Frontend work via IBM iX for Barmer, one of Germany's largest health insurers, including contributions to modules of the Barmer App and a cross-platform design system.

React Native React TypeScript Design System

Olympia Verlag (Kicker)

Fullstack contributions to FWMFL, a podcast and audiobook streaming platform for football fans, spanning mobile, backend services, website and Kubernetes infrastructure.

React Native Go / Rust Kubernetes Fullstack

More App Case Studies

Additional mobile products, from piparo.tech ventures to focused client engagements.

Glowing Blox A local and online strategy game built across mobile, multiplayer, backend and web.

Goory A local-product discovery platform spanning mobile, CMS, backend and delivery.

Yuu Yoga Mobile product work for Porsche Digital’s guided yoga experience.

GreenSP A focused mobile information product for Ranger sales partners.

ME SENSE The Weatherdock mobile experience for remote boat monitoring.

Freelance Developer

I help companies build high-quality software - primarily mobile and web applications, but also backend systems and DevOps infrastructure. From startups to enterprises, I bring ideas to life with clean code and modern technologies.