OS kernel programming. Modern Linux is too complicated for me, so I pick something smaller that can be easily understood by reading docs for a few hours: https

OS kernel programming. Modern Linux is too complicated for me, so I pick something smaller that can be easily understood by reading docs for a few hours: https://pdos.csail.mit.edu/6.828/2012/xv6.html https://pdos.csail.mit.edu/6.828/2012/xv6.html You'll see various folks publish their xv6 modifications on Github. BTW, my daily work is mobile app dev (mostly Kotlin, sometimes Flutter). Totally unrelated, eh?