I joined binwiederhier for a while in developing Syncany and he invited me for an internship at his current employer.
The experience I gained both in contributing to Syncany and said internship helped me indirectly land the role I'm currently in, and my open source experience in general helped me land a cool engagement where I got to do some innovative open source projects.
Ping me and we'll chat if you like. I'm working on a new open source project [1] that needs your help, hehe.
[1] https://ntfy.sh
However, ntfy is 100% open source so you can self-host it if you like, and I believe it does have a bunch of features that Pushover does not (email notifications, email publishing, scheduled delivery, tags/emojis, phone calls, icons, ... see for yourself: https://docs.ntfy.sh/publish/). I'm sure ntfy is missing things too that Pushover has. I'll let you be the judge of it.
Is your name a reference to that Grönemeyer song, btw? ;)
And yes, it's a reference to the song. Good catch. I was listening to it 20 years ago or something like that when I had to come up with a new username. And it stuck. ;-)