Any field where the bug could be catastrophic. The only reason the shuttle group was sustainable the way it operated was because a bug in the software they work

Any field where the bug could be catastrophic. The only reason the shuttle group was sustainable the way it operated was because a bug in the software they worked upon was in that category. Off hand, commercial space, deep space science, aviation, medical, nuclear, & military systems (not all) are that way. Be warned that it's very slow moving, and your skills in relatively new hardware/software stacks will basically go out of date. Your skills will be in being a specialist in whatever the environment is of the system you're working upon - much more so than being a general software engineer. It's not bad, but it's very different than the typical HN environments.