Potsdam · Berlin-Brandenburg
Self-hosting · open source · teaching. Based in Potsdam.
I build sovereign infrastructure for people who create, secure, and decide for themselves who to share it with.
Six fields where I think, build, and teach.
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Souveräne IT-Stacks für kleine Teams und Privat-Setups.
Kern-Säule
Founded 2026
Registered in the German commercial register (Amtsgericht Potsdam, HRB 42359 P): a limited liability company (UG) as the legal frame for consulting, buildout, operation and teaching of sovereign infrastructure — no license traps, no forced cloud dependencies.
Business inquiries go through the company. This site is its presence.
Three stations, one line — open source, IT craftsmanship, UG.
Linux, in-house tooling, ImageRect, homelab stack. What I build belongs to the community when possible.
Self-hosting, AI integration, security hardening. Systems others can run without me.
Founding project 2026. Legal frame for the consulting work. See above.
No formal degree, lots of practice, a few certifications in the pipeline. Based in Potsdam, working in Berlin-Brandenburg and remote.
Code at codeberg.org/andremadstop
Email is fastest. I usually answer within a day.