Amazing how many people have been recommending against California!
I'm from New Zealand, but I've worked in Seattle and Chicago as well as Silicon Valley. When I was job hunting a couple of years ago (after being back in NZ for a few years) I was getting good nibbles from California companies and both Amazon and Google were at the point of flying me from NZ to USA for on-site interviews when Samsung R&D Russia offered me a six month remote work contract based just on a skype interview, so I took that. That went well and they offered me a permanent job in Moscow with a visa that's essentially identical to the US H1-B (i.e. fixed to one company, 3 years with one 3 year renewal, after that either get residency/Green card or else leave the county for a year minimum).
It seemed interesting, so I went with that, and I haven't regretted it!
The salary is internationally competitive, but taxes are only 13%. Apartments and restaurants are very similar to NZ prices (far less than California) and everything else is much cheaper: Uber (or Gett, Yandex .. all have apps), buses&subway, internet, mobile. Cheap 2-3 hour flights to anything from Turkey to Italy to Switzerland to Paris/London to Norway. Spain a bit further. I'm the only foreigner in the company, but everyone speaks English and all the work is in English. If you go into a random shop or cafe in central Moscow it's about 50/50 whether they'll speak English -- more than one person there and the odds only go up. And if not ... there's google translate.
No one has *ever* been upset or rude that I don't speak Russian, or used a translator. Unless I tell them I'm from NZ I suppose most people assume I'm American or possibly English. I've never seen any anti-foreigner things at all. On the contrary, everyone has friends or relatives who live in the USA, they maybe visited them, everyone who can afford it goes on vacations in Europe. People in Moscow and St Petersburg, at least, feel they should be part of Europe and it's only their stupid government that prevents them.
When I moved here it took me two days to find a 580 sq ft (54 m^2) nice modern apartment two minutes walk from work for US$960 a month (NZ$315/wk). Sadly, the owner recently decided to sell it. Now I'm in a nicer 830 sq ft (77 m^2) apartment in the same building for US$1140 (NZ$375/wk). Water and electricity add about $25 a month (winter heating is included in the rent, so electricity is only cooking, lights, computer...), and internet is US$11/month for 100/100 Mbps unlimited. I have 3 GB/month on the iPhone for US$6. If you go to town in a good (but not top) restaurant you can spend $35 - $40 (NZ$50 - 60) including salad, main, dessert, beer/cider, coffee. Or you can spend half that. Uber is 90c pickup, 15c/km plus 15c/min ($1.75 minimum trip). A single metro/bus/tram ride is 60c, a 2nd bus/tram ride (not metro) within 90 minutes is 30c, extra bus/tram within that 90 min are free.
Coming from NZ it sucks that there aren't mountains or beaches near. You can fly to the Europe ones easily enough. The winter is also a bit rough, though no worse than midwest USA or Canada. All the apartments and offices and shopping centers are heated like crazy in winter -- 24 - 25 C is the norm. Too much.
Don't mean to be propaganda here ... just agreeing with the "I've worked in California and a lot of things about it suck" general sentiment. There are other places.