It was a normal developer position (with PhD bonus possibly) at a private enterprise that only worked on public projects. No Befristung, no other surprises I go

It was a normal developer position (with PhD bonus possibly) at a private enterprise that only worked on public projects. No Befristung, no other surprises I got aware of. I was also a bit surprised that this existed, because with private-public constructs like Fraunhofer there usually are the limitations you mentioned (and the low salary). Here the limitations probably didn't exist as the company was 100% private.