Projects
Things I built
From a self-built cluster in a spare room to GPU data centres, a federal identity and a ten-year public AI programme — a selection across thirty years.
wbtl.app
Free browser tools — local, no tracking. Built end to end by spec-driven agentic AI development.
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rokka.io
Image storage and rendering done right. 200M images, 1B hits a day, 100% uptime over eight years.
Detailsegovpartner AI platform
One secure AI platform for the 116 municipalities of the canton of Zürich — won by public tender, owned end to end.
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Swiss e-ID
Base infrastructure and cryptography concepts for the Swiss electronic identity — co-authored white paper, released for public consultation.
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Migros product-data API
A core enterprise service: ETL over millions of products from 30+ heterogeneous sources, served as one REST API to the whole organization.
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Award-winning salary system
A salary system for a self-organizing company of ~250 people. Won the Swiss HR Award 2022; salary satisfaction rose from 82% to 97%.
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base32
The only fully RFC 4648-compliant Base32 implementation for PHP — 34 million downloads and counting.
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Barcaddy
A free, offline barcode and loyalty-card wallet for Android. No account, no cloud, no ads — and the small details done right.
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ShareReactor
P2P platform serving 2.5 million visitors a day on a self-built 25-server farm with 150 volunteers.
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