Software that actually runs.
Every project below is either in active production or in public beta. No portfolio polishing, no dummy screens — all numbers real, all screenshots current.
3motiBot — own Matrix Messenger with Bridges
Self-hosted Matrix homeserver (Synapse + Element Web) on Hetzner — with WhatsApp, Signal, Discord and Telegram bridges. A real GDPR alternative to WhatsApp/Slack for SMEs. Branded per client.
Cloud-Exit Stack — own photo, drive and mail server
Lived exit from US cloud services: Immich instead of Google Photos, Nextcloud instead of Dropbox, Matrix instead of WhatsApp, own Postfix mailserver instead of Gmail. In daily personal use.
Time-tracking system for small and mid-sized companies
Backend, web dashboard and mobile app (iOS + Android) for legally compliant time tracking. GDPR-compliant, aligned with German working-time law 2026 standards. White-label available — API integration (Crewmeister etc.) or own backend.
crescendo — Guitar-school Portal
Django portal for guitar teachers and their students: scheduling, practice tasks, learning progress. Currently in tester use, no paying customers yet.
3motiBot — Mobile AI Companion with banking & finance analysis
Flutter Android app with Claude AI chat, IMAP/SMTP mail, planner, WhatsApp integration and real PSD2 banking connectivity (Enable Banking API). Transaction categorization, subscription audit groundwork, encrypted data storage.
Coloring-page Generator (AI)
Locally-running proof of concept: text prompt → printable coloring page. Completely on own hardware, no OpenAI, no cloud upload.
gl-helden — support portal for caregivers
Django portal supporting caregivers in kindergartens, schools and after-school care — with built-in management functions. Free, public sign-up, release in Q2/2026.
Hetzner Panel — own server administration tool (Go)
Lean, individual web panel to manage Hetzner root servers. Live metrics, service restart, logs. Single binary in Go (~25 MB), runs on any Linux server.