just a side note: long before a small part of the programming world took over this acronym, it used to mean the sound engineer (and sometimes other staff) that were in the venue, embedded in the crowd, working on live sound while the talent was up on stage. "back of house" was behind the stage, "front of house" was the room/venue itself, and the people working in it.
I’m not sure the programming world took over the acronym, I think OP just confused them. In finance at least, the terms Front Office and Back Office are used. I’ve never heard anyone use the restaurant/entertainment variants used.
Also weirdly C++ devs aren't making that much more than the fullstack devs who build FOH tooling for traders.