AI Product Builder from Kraków. I build AI agents, apps and hardware that get past the demo. Mostly in music and sport.
Not taking new projects. Open for consultations on AI strategy, architecture and code review, or an MVP and launch plan. Email me one clear question at mariusz@mtl.dev and I reply within two working days.
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- Vimo Swim: a programmable swim metronome that sits under the swim cap, plus apps for swimmers and coaches. Firmware in Rust on nRF52840, apps in Flutter, a Garmin Connect IQ app in Monkey C. In a testing program with Total Immersion coaches in Poland and Spain.
- Vimek: a Claude agent in Slack for the Vimo Swim team. It reads company data through our own MCP server, and every change it proposes waits for a teammate to click Approve.
| Repo | What it does |
|---|---|
| trello-mcp | Trello boards, lists and cards from Claude Code |
| mcp-codemagic | Trigger and check Codemagic CI builds from Claude Code |
| signnow-mcp | Send documents for e-signature with SignNow |
| mailchimp-mcp | Draft Mailchimp campaigns and send test emails |
| mcp-olx | Manage your own OLX adverts from Claude |
| wfirma-python-sdk | Small Python SDK for the wFirma.pl invoicing API |
| arduino-midi-ableton | Arduino MIDI controller with two buttons for Ableton Live |
| gcloud-pubsub-example | Event-driven audio analysis on Google Cloud Run |
More demos and experiments are in my repositories.
Claude Code and the Claude API, Python and Django, Nuxt, Flutter, Rust (Embassy), Monkey C, Google Cloud and Firebase.
Make Things Live.