I heard the average tenure for an SDE at amazon is something like 9 months. The culture is so repulsive that if you're good you leave soon and convert that big name on your CV to something better. I know a few really good ex AWS engineers and the thing in common is they hate Amazon and will rant about how dumb the culture is.
I use conductor with git worktrees and will literally have 10 or 20 running at a time getting pinged as they finish stuff for me to review, mostly getting rid of small ticket and doing random POCs while I focus on bigger stuff, the bottleneck has literally become the company doesn't have enough stuff to give me. It only really works however because I have a lot of context and understanding of the codebase. It's already here.