Would be cool to write Rust firmware for drone defense systems or something like that.
Same goes for the SAAB Kockums submarines. Not to mention the radar systems.
But you would need to be a citizen to get security clearance.
I guess I've put them at the bottom of my list previously due to moral reasons, although the problems are often interesting.
TBH I'm always puzzled why EU never managed to push out its own social media software. Maybe just because I don't know?