I developed and maintain a complete solution for sellers on the Aukro marketplace to comply with the EET (Electronic Registration of Sales) legislation in Czechia. Every order is automatically submitted to the Financial Authority and a receipt is sent to the customer by email using the EET and Aukro APIs on the backend while the frontend enables users to easily configure their accounts and allows them to submit orders manually. The frontend was designed by Michal Puchmertl at Lumistudio.
As a fan of the recently released downhill biking game Descenders, I decided to build a website for sharing "seeds" (unique identifiers of the procedurally generated levels) with other players. Seeds are copied to the user's clipboard with a click of a button and can be pasted into the game. Users can sign in with their Steam account, which enables them to like seeds and share their own. Working on this project helped me gain experience with JWT and OpenID authentication, while doing something useful for the game's community. Most of the planned functionality has already been implemented, but there is still some work to be done (e.g. search).
I contribute to open source on GitLab and GitHub.
I maintain several AUR packages for Arch Linux.
I wrote a shell script to automatically set up my Arch Linux machines.
I sometimes take part in (and help mod the subreddit of) DevWars, a webdev game show.
I wrote and maintain a couple of Firefox and Chrome extensions.
I occasionally tinker with my Arduino, Raspberry Pi or ESP8266 boards.