Yeh it's a rough but rewarding life; I spend most of my hours on problems that aren't on Google, or any LLM, so I'm kinda used to it now. (Stockholm)
Would love to know of more spaces which require this level of programming - usually I feel kinda underworked at most shops.
Though, true enlightenment is combining the urge to NIH with some, light, sensible borrowing from those smarter than us :) very much a key skill unto itself.