[smaps]

If you've been working as a developer for 5 years no one will care about your grades in undergrad, and a Masters in Comp Sci is unlikely to be worth the opportunity cost.

I would suggest starting to look for developer jobs at smaller companies or startups. You're much more likely to be working on all kinds of things instead of being stuck in small areas of the code. Working at FAANG is likely to be the exact opposite where you'll be a bit more of a cog in the machine that works on some small feature.