I guess it depends on the type of contract. I checked the job offers on https://germantechjobs.de/en and it seems 80k/year is in the middle for many for these (I ignored job offers where they start with 45k for a senior position, this is just ridiculous).

And it seems I was wrong, because according to this page https://salaryaftertax.com/de/salary-calculator 80k actually gives you only 4k/month, not 5k, because of almost 40% tax. Sorry for that (on the other hand, I learned something new...).