I'm an Australian working in CA at a tech startup. Lmk if you have any q's about the E3. Tldr of it is that it's really easy to get if you have an offer of employment. So easy you shouldn't need a lawyer, which my company found weird because they're used to the complexities of the H1b.

A lot do and as you probably know - at least pre-pandemic - the E-3 visa is relatively easy and fast to get. Unfortunately, I can't provide the specific names of clients.

Yes E3 is one of the easiest, along with Canada/Mexico. Should not be an issue for any company in the Bay Area.