Do not quit your day job.
You might hear anectodes from successful people chasing their dreams, quitting their jobs and this working out. You do not hear from the thousands more people where this did not work out quite that well.
Also, you ask this on Itch. The developers and hobby enthusiasts are self employed. They are not "in the industry". They are indie. A very few have releases on the bigger platforms like Steam and you will even find some very small game studios here. Talking a few people. Nothing like whatever you work for by working on a back end.
You might want to ask at a place where actual employed non indie game developers hang. Although some of them might still visit Itch. But it does not sound like you want to become an indie game developer, but an employed one. Look here to get a glimpse of the general professional level on Itch. https://itch.io/board/10020/help-wanted-or-offered Maybe join a game jam for fun. https://itch.io/board/533649/game-jams
Sounds like you can code. Many people look for coders in those collabs / jam collabs. But this will be "indie" experience. Not professional game development experience.