Google L3 to L4

Not usually but I'm sure some goofy fuck will swing by to say they did it in 3 months or whatever so I guess anything is possible. Expect them to draw it out as long as they can.

It should. Most of the time people joining need to ramp up on the Google tooling and codebase. However, I fully expect someone experienced to be able to level up to L4 within a year. 6 months is hard because you must have launched something.