[KMnO4]

> but nowadays my work has boiled down to writing unit/integration tests or just fixing bugs. The last major feature that I implemented was 5 months ago.

In that case, stay far away from any Fortune 500 (FANG or otherwise). It takes a LOT of work to move a boulder, and smaller companies are much more agile.

In my personal experience, I find 20-100 person companies to be ideal for giving you freedom to work on the cool things.