Maintainer of Yuvomi, the self-hosted family planner. Computer science and math teacher in Germany.

I build software that a household can run, own and leave: its data stays on its own server, nothing tracks it, and nothing locks it in. Open standards, MIT license, no cloud account with anyone.

yuvomi.cloud · LinkedIn · Sponsor

Tasks, calendar, budget, meals, shopping, health and documents for a family, in one PWA on a home server or NAS.

• In development since March 2026 with Node.js, Express, SQLite and plain JavaScript. Translated into 27 languages, runs on amd64 and arm64 in 256 MB of RAM.
• In the app stores of Umbrel, TrueNAS and Unraid, and as a Proxmox community script. I bring the Umbrel package up to date with every release.
• Covered by Caschys Blog, deployn on YouTube, mariushosting and Self-Host Weekly.
• Others build on it: a Home Assistant add-on and a community handbook.

• Few moving parts, on purpose. No frontend framework, no bundler, no CDN; third-party code is vendored by hand with its license. Fewer dependencies to update, audit and trust, and less to break for a family that updates once a year.
• Rules live in tests. The hard constraints - no framework imports, no innerHTML, every UI string in every language, database migrations that only ever grow at the end - fail the build instead of relying on good intentions.
• A fix counts when a test proves it. Every bug fix comes with a test that fails against the code before the fix.
• AI agents, openly. Much of the code is drafted with AI coding agents, and two of them review pull requests automatically. I set the direction, the constraints and the tests they have to pass, and I answer for what ships. How Yuvomi uses AI

Teaching computer science shapes how I write documentation, error messages and issue replies: for the person who has to understand them, not for the one who already does.

• Questions about Yuvomi: Discussions
• Press, talks, collaboration: info@yuvomi.cloud or LinkedIn
• Support the work: GitHub Sponsors