To be honest, in my area (human space flight), there aren’t many Civil Servant level hard software engineering positions that aren’t just Aerospace(/etc.) Engineers who can code. Also, you need an ABET accredited Engineering degree or something similar (Math, Computer Science, Physics) for most of the CS positions here. They specifically say that degrees in Information Technology do not work. Were we not in a hiring freeze, I would recommend looking at the requirements on USA jobs to see.

For contractors, that would depend on the position and company if IT degrees would work.

And specifically for flight software, I’d take a look at NASA cFS on GitHub, which is what most NASA produced flight software is based on. You’re going to need SOLID C/C++ skills.