I build for healthcare, climate, and education, a lot of it around medical imaging, offline-first sync, and sensitive data. Based in Berlin.
Visian (Apache-2.0), Project lead
A browser-based tool that lets medical researchers outline structures such as tumours in 3D scans (MRI, CT). I designed the architecture and co-built the WebGL rendering engine with volumetric ray tracing, along with "smart brush" tools that follow structural boundaries. Adopted at the Max Delbrück Center, Charité Berlin, Mount Sinai, and the WHO AI4Health Focus Group.
- Paper: Interactive Volumetric Region Growing for Brain Tumor Segmentation on MRI using WebGL (Web3D '21)
- Demo video
apollo-offline (BSD-3-Clause), Author
An offline-first toolkit for the Apollo GraphQL client. It allows apps to keep working without a connection and sync once the server is reachable again. Published when I was 17 (so please be kind!). Also contributed TypeScript declarations to redux-offline, which apollo-offline builds on.
CTO at Floy (@FloyAI)
Floy's AI detects conditions in radiology scans that are already being taken, such as osteoporosis on a spine MRI or cardiovascular risk on a mammogram. Since 2024 I've led the rebuild of its engineering, products, and infrastructure under EU MDR Class IIb and ISO 13485, including an MR head foundation model trained on >175,000 studies and a full migration to AWS. Co-author of an AWS blog post on the platform.
Co-founder of Malpaux (@Malpaux)
An operator firm I run with Max Lindner, whom I've been building things with since we were fifteen. We work with founders in healthcare, climate, and education.
Immunkarte (2021–2022)
A physical card carrying the EU Digital COVID Certificate, issued through pharmacies, for people who couldn't use the official app. I built the app and dashboard >10,000 pharmacies used to issue cards, with GDPR-compliant handling of health data. Built by a team of eight, we issued 100,000+ cards a day at peak and 5 million in the first year.
Master's thesis (HPI, with Charité's neurosurgical department)
Automated tract segmentation for surgical risk prediction in brain tumour patients.
Producing Reindeer, a feature documentary about land, climate, and the question of what is enough, in production across Sápmi and Southern Norway. Trained as a paramedic in 2025. Otherwise usually climbing a mountain.