Software engineer in Vienna.
- pruefstand: macOS menu bar queue of the GitHub PRs waiting for your review, built on the gh CLI
- zu-tun: macOS todo app with a menu bar popover and a widget, backed by a plain todo.md that agents can edit
- dotfiles: one set of agent instructions, synced to Claude Code and Codex, with drift checks
- batchday: local AI meal planner for Austrian supermarkets, with macros and one shopping list
- ocean-drive: dark Garmin Forerunner 970 watch face with health stats and your next meeting
- CV: jonaslaux.github.io/cv.pdf
- Questions or ideas: open an issue on any repo





