"California law prohibits noncompete clauses, contributing to the inveterate poaching with which the state’s technology industry was founded. It can be brutal for employers, but it helps raise wages and has created a situation where any company looking to hire a bunch of engineers in a hurry, be it an established giant or a start-up, feels it should locate there."
https://www.geekwire.com/2017/scaled-back-bill-aimed-providi...
Apparently Google and labor unions supported the original bill, but the article says that's not the case for Amazon and Microsoft
The scaled back bill removed those points:
> Make noncompetition agreements void if the employee is a temporary or seasonal employee, or is terminated without just cause or laid off.
> Create a rebuttable presumption that agreements restricting competition for more than one year after termination of employment or for employees who are not executives are unreasonable.
> Make noncompetition agreements with independent contractors void