Welcome!

This is the home page of David Kolossa, in the Internet commonly known as yayachiken.

I live in the old imperial city of Aachen, Germany, close to the “tri-border region” of Germany, The Netherlands and Belgium. I am also the father of two beautiful children, a son (7) and a daughter (2).

In 2016, I graduated from RWTH Aachen University with a Bachelor’s degree in Computer Science, and I currently work as a Software Engineer. My current work at a local mining supplier revolves around development of so-called DevOps processes. We perform agile delivery of software solutions while still maintaining the quality that the conservative and safety-minded mining industry requires.

Since 2016, I am a proud owner of a HAM radio license (call DL6IN). Unfortunately, I am not QRV for lack of equipment.

Other (not only radio-based) interests include working on Freifunk mesh networks, most notably in the community of Aachen, high-frequency radio tech, working with electronics and system programming. As for non-technical subjects, since recently I’m learning the basics of finance, the economy, and bookkeeping.