Tests Analyzer is a free, open-source IntelliJ IDEA plugin for visualizing test execution as a Gantt chart. It was inspired by a conversation at Spring I/O 2026 in Barcelona and built as a hands-on introduction to IntelliJ plugin development. The plugin supports both Gradle and Maven build systems, making it compatible with the majority of Java and Kotlin projects. It works with popular test frameworks including JUnit 5, Kotest, Spock 2.x, and TestNG. Test results are collected in real time using IntelliJ's `SMTestRunnerEventsListener` extension point. A timeline chart shows which tests ran in parallel and which were sequential bottlenecks, making it easy to identify performance issues. A sortable and filterable…
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MIDI-controlled LED lighting system
I had a solo act planned at Schron in Poznan as part of Poznańskie Spotkania Syntetyczne — a local synthesizer and electronic music community meetup. Beyond the musical setup, I wanted to create a visual layer: lighting synchronized with the music in real time. I built a custom MIDI-controlled LED system using a Teensy 4.0 microcontroller, which connects over USB and presents itself as a native MIDI device. Two one-meter WS2812B LED strips serve as the visual output, controlled by firmware written in C++ using the Arduino framework and FastLED library. The enclosure and LED column stands were 3D printed, and the end result is a dynamic light show where…
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Campfire Songbook
nteractive songbook application for campfire events. t allows creating multiple sessions as a host or join existing ones. The host can choose and select a song which will be updated immediately on a joined user's screen. App solves most common issues: What are the chords for the song? What is the lyrics of the song? Which song is playing now? What songs are available in the songbook?
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Bike Escape [mobile app]
The first serious project made for the purpose of learning programming. Written in about a year after hours. It was a difficult time, full of new things, but it made me to understand and learn many aspects of programming. The project was almost finished, but in the end I've never release the app. Although the application was never published in GooglePlay or AppStore stores, it was well tested on both type devices and worked fine.
It works on my machine ¯\_(ツ)_/¯
