📍 Bühl, Germany | 💻 Software Craftsman | 🏢 Teufel IT

I’m a Software Craftsman with a focus on architecture and developer experience. I enjoy building things that make development less painful and systems more resilient. Currently doing some heavy lifting in enterprise environments, but always keeping my hands dirty with Open Source.

I help companies bridge the gap between complex requirements and maintainable, high-quality software. With enterprise experience since 2012 and deep developer tooling knowledge, I make your codebase an asset, not a liability.

How I can support your team:

• Architecture & Strategic Consulting: expert feedback on system design and scaling modern software ecosystems.
• Modernization & Refactoring: migrate legacy codebases to modern, clean, testable, high-performance stacks.
• Developer Experience & Tooling: build testing and automation infrastructure, drawing on years of maintaining developer tools with over 2 million installs.
• Multi-Layer Test Architecture: unit, integration and end-to-end tests in the CI/CD pipeline that check every change before it goes live.
• Agent-Based Development: bring agents into your development process productively, with clear guardrails, reviews and tests.

📅 Available for new projects from January 2027.

Past projects and references: see my CV.

Let's build something that lasts.

🧪 vscode-jest-runner: run and debug Jest, Vitest, Playwright, Rstest, Bun, Deno and Node.js tests right from VS Code, zero configuration. Maintained since 2017.

📺 SendToKodi: play YouTube, Twitch, Vimeo and 1000+ other sites on Kodi via yt-dlp, with a browser extension for Chrome, Firefox and Edge.

• 🧾 haben (docs) - Bookkeeping for German freelancers: e-invoices (ZUGFeRD, XRechnung), bank reconciliation, EÜR and VAT returns via ELSTER. A self-hosted alternative to lexoffice and sevDesk
• 📬 kontext (docs) - Groupware for small businesses on Stalwart (JMAP): webmail with shared mailboxes, team calendar, contacts as a mini CRM, tasks, team chat with video calls and Fritzbox telephony. A self-hosted alternative to Google Workspace and Microsoft 365
• 📝 schreibzeug (docs) - Office suite that edits Word, Excel, PowerPoint and PDF files together in real time, in the browser or as a desktop app. No document server, files stay .docx, .xlsx and .pptx

• 🎛️ quadeck - Web UI and server console for Podman Quadlets and systemd: containers, updates, disks, backups, shares. One binary, nothing to configure
• 🗄️ snapraid-ui - Web UI for SnapRAID: scheduled sync and scrub, SMART disk health, alerts and guided disk replacement
• 🏷️ namarr - FileBot alternative: renames movies, series and anime for Plex, Jellyfin, Emby and Kodi, with preview and undo
• 📥 haul - Headless JDownloader and pyLoad alternative for file hosters, written in Rust, with Click'n'Load
• 🔁 stellwerk - Central web UI for Syncthing: pair devices, share folders and set paths for every PC from one place, with a hub that keeps a full copy
• 🪁 windfenster - Wind forecast and live wind map for kitesurfing, windsurfing and wing foiling: measured wind, five weather models and which one was right at your spot. A self-hosted alternative to Windfinder and Windy
• 💾 spielstand - Game save sync and backup for Linux PCs and the Steam Deck: one server at home, a small agent per PC, every version kept and nothing overwritten. A Ludusavi alternative with a web UI

• 🏠 ccu-addon-mui - The complete WebUI for Homematic CCU3 and OpenCCU, rebuilt: control, pair, link and program devices, live over WebSocket, installable as an app
• 🧱 kachelwerk - Home Assistant cards that feel like an app: shutters you drag like a window, lamps that light up their tile, a thermostat dial, a Ferraris meter whose disc turns with your power. Installable via HACS
• ⚡ esphome-energy-dashboard - Live energy flow (solar, grid, battery, gas) on an ESP32-S3 touch display
• 🎛️ esphome-room-panel - Animated room control panel for Home Assistant on a 4" ESP32-S3 touch display: lights, shutters, Daikin AC and heating, one YAML line per device
• 🏡 esphome-house-panel - Your whole house as a living cross-section on a 7" ESP32-P4 display: temperature-coloured rooms, glowing windows, shutters, floor heating and animated energy flow. Tap a room to control it
• 🧵 esp32c6-thread-router - Turn a cheap ESP32-C6 into a Thread router to extend your mesh
• 📡 esp32c6-zigbee-router - Turn a cheap ESP32-C6 into a Zigbee router to extend your mesh
• 📶 funkloch - Signal monitor for Zigbee2MQTT and Thread/Matter devices: LQI and RSSI history, mesh map, heatmap and offline alerts. Self-hosted, no cloud

• 🍷 prefixr - Linux game launcher for Windows games: Wine and Proton prefixes, Proton-GE downloads, per-game tuning and Steam integration. Built with Tauri, Svelte and Rust
• 🖥️ fernsicht - Low-latency remote desktop and game streaming for Linux: about 10 ms glass-to-glass, AMD, Intel and NVIDIA, Wayland and X11, pair once with a PIN
• 🔑 keybund - SSH key manager for Linux and macOS: the right key per GitHub/GitLab account, client and server, the right Git e-mail per folder. Plain OpenSSH and Git config underneath
• 🎙️ pd200x-control - Linux app for the Maono PD200X and PD200XS microphone, a MAONO Link alternative: gain, EQ, compressor, limiter and the RGB ring, live level, test recording and a level finder for quiet dynamic mics. Built with Tauri, React and Rust

• 💨 reactive-volcano-app - Web Bluetooth app for Storz & Bickel vaporizers (Volcano Hybrid, Venty, Veazy, Crafty). No app store, no account
• 🌊 Flugwetterdaten - Wind, water temperature and water level for my wingfoil spot at Baden-Airpark (live)
• 📄 astro-cv - My CV as a website, built with Astro and MDX (live)
• 🌐 teufel-it-astro - Bilingual Teufel IT website with Astro, Tailwind and a WebGL starfield (live)

• 🧪 vscode-jest-runner - Run and debug tests for all major JS runtimes and frameworks from your editor
• 📦 vscode-distrobox-reveal - Reveal files in the host's file manager from inside Distrobox containers
• 🗣️ vscode-speech-language-switch - Switch the VS Code speech recognition language from the status bar

• 🎬 chrome.sendtokodi - Send the video you're watching to Kodi with one click (Chrome, Firefox, Edge)
• 🧹 oneclickhistorycleaner - Clear your browsing data with one click, the way you configured it once (Chrome, Firefox, Edge)

• 📺 plugin.video.sendtokodi - Play links from 1000+ sites on Kodi using yt-dlp, up to 4K
• 🏠 repository.sendtokodi - Kodi repository for SendToKodi

• ⚙️ workflows - Shared GitHub Actions for multi-arch Docker releases (amd64 + native arm64), used across my projects
• 📞 snom-xml - Sync Google Contacts to Snom IP phones via XML

When I'm not coding, you'll find me on the water 🌊