[mak4athp]

Talk to your supervisor (or theirs) first!

They've spent the time to hire and ramp you up one their processes and code. Unless you're terrible at your job, they don't want you to walk away. So tell them that you're feeling burnt out because X, Y, Z and that you want to see if there's a way to make things more satisfying for you.

It's really sad when a good engineer leaves a team without having shared their concerns ahead of time. One of the most important and satisfying roles of a manager is to help in situations like this, but they can't do that if you don't give them a chance!