I build and modernise large-scale Swift codebases. Currently working on Germany's electronic patient record (ePA) — a white-label iOS app serving 15+ health insurers, built with 40+ engineers at IBM scale.
Senior iOS engineer on Germany's electronic health record: one white-label codebase powering the apps of 15+ statutory health insurers. My focus: architecture, authentication, accessibility, tech-debt reduction and SBOM generation — in a team of 6 senior iOS developers within a 40+ engineer project.
BARMER eCareHealth-insurance app for one of Germany's largest insurers. Drove the port from UIKit to a SwiftUI-first architecture and introduced dark mode across the entire app.
Mercedes-Benz Advanced ControlCamper-van control app talking to the vehicle over Bluetooth Low Energy: proprietary binary protocols, ECDH key exchange, AES-CCM encryption and a fully config-driven UI rendered from JSON. Lead iOS engineer and Scrum Master.
BMW Motorrad Connected & BMW One ConnectedMotorcycle navigation optimised for riders — HERE/TomTom routing, head-unit communication, audio guidance — plus feature work on BMW's connected-car app in a 30+ developer project.
Ubermind Track — indie appSolo side project, end to end: idea, design, architecture, development, TestFlight betas and App Store release. An app for tracking personal self-experiments.
White-label platform, appDev GmbH — feature work on a legacy system powering 70+ apps (Swift, Obj-C, TCA, GitLab CI).
HieroQuest — master's thesis at TUM: an educational game teaching Egyptian hieroglyphs, incl. an experimental learning study (Unity 3D).
LeadApp, Weptun — lead developer of an iOS lead-management client with business-card scanning.
KRI SWOOP — stroke-patient workflow tracking with BLE beacons at hospital Rechts der Isar; team coach & Scrum Master.
iWash — washing-label image recognition (OpenCV) and NFC for B/S/H; lead developer in a team of 7.
Modernising grown codebases without stopping feature work — UIKit → SwiftUI, refactoring, tech-debt strategy.
Health and automotive: sensitive data, authentication, accessibility and security requirements as daily business.
BLE protocol design, applied cryptography, state machines, config-driven UI — the parts most app developers avoid.
Comfortable in 40+ engineer codebases; experience as Scrum Master, team coach and onboarding mentor.
I write about productivity systems: author of Scale-Smart Productivity and the blog Fractal Productivity.