6/7 years for staff (at a FAANG) is exceptional, I have personally never seen it. From what I have seen staff eng tend to be around 10 years of experience at the low end.
> have more offices in Europe
This has been hashed a million times:
1. Time zones 2. Lack of candidates building FAANG scale systems 3. Employment laws are hostile to employers
That being said, I have seen a lot of recruitment in Poland lately. It may not be glamorous though as people in Poland are expected to work with some amount of overlap with US time zones, so you are going to have to be working until 9pm most days.
Switzerland also has some high comp, and from FAANGs
European countries that reduce some exposure to the Eurozone and have values more similar to American ones, attract American companies