Developer
A musician who builds instruments for musicians. Self-taught - like everything here - from websites years ago to production software with mobile apps today, shipped end to end: design, code, audio, deployment.
The through-line from the other two lives is direct: the ear that judges a take now designs training drills, and the technical fluency that keeps a studio running now ships software. The workflow is modern and AI-assisted - mastered in depth, not leaned on. Client work is rare and deliberate; the products below are the portfolio.
This site is one of them - Next.js and Payload CMS, self-hosted.
Apps & projects
Earonman
founder & developer
Ear training built by a working musician - with a growing community of serious listeners around it. Intervals, chords, scales and Jazz Voicings practice are free; Pro unlocks six more modules and unlimited training. Live on web, iOS and Android.
On the web since October 2025, iOS since April 2026, Android since June 2026 - in active development, with new training content coming from the same place as the lessons and transcriptions. Built with Next.js, TypeScript and Supabase; the mobile apps in React Native (Expo); audio via Howler.js and Web MIDI. Earonman® is a registered trademark.
Baracca Creative Hub
founder & developer
Studio software built for Baracca - sessions, clients, and Proposals: the tool that turns a project brief into a professional quote. When a production client gets a price from Tomáš, this is what made it.
Live and in daily use at the studio. The same stack as Earonman - Next.js, TypeScript, Supabase - shipped and run end to end.
Netor.cz
creator & author
A Czech guide to AI and the internet, written and built end to end by Tomáš. Verified how-tos, learning paths and cheat sheets that run from LLMs, prompts and RAG to n8n automation, self-hosting and coding with AI - laid out in three tracks: beginners, freelancers and marketers, and developers.
Live and publishing regularly, with its own weekly newsletter, Netor weekly. The name is a play on words: the one who guides you through the net.
Infografiky.cz
creator & developer
An AI tool that turns a topic, a paragraph, or a link into a finished infographic - correct Czech diacritics and typography included - which you then fine-tune by text and color. Built for Czech and Slovak.
In closed beta, opening for early access. Built solo, front to back.
TwoFiveOne.net
creator & developer
A free reference of jazz piano ii-V-I voicings, where his pianist and developer sides meet. Shells, rootless, block, quartal and the So What voicing, in all twelve keys - each with notation, audio and MIDI - plus one voicing a day.
The newest of his tools, live and free to browse. Built solo, front to back.
JazzBooksReviews.com
creator & reviewer
Jazz education books reviewed by someone who actually practiced them. Instead of another five-star Amazon rating, each review answers the real questions - what the book teaches, who it is for, and how to practice from it - across twelve categories from theory and improvisation to ear training and Brazilian jazz.
A working pianist's honest read on the method books he has studied. Built solo, front to back.