Well, a number of people use Eastern Europe location as a filter for 'cheap labor'. And SV startups tend to have crap wages to begin with, but offer equity to compensate. I could imagine a few startups seeking to crimp further.
> Meanwhile no developer in my country even responds to offers if the salary is not given ... before the interview
Posting salaries is rare in the US. It's becoming the law in California, but this is hardly universal. There's an expectation that you'll negotiate, but they're really hoping you won't. And plenty of US engineers assume if you don't post a salary, it's because the budget for the position is low.
Citation needed on that. I really hope you’re right and I’m ignorant here, but I think you may be confusing it with the recent state law that makes it illegal for prospective employers to ask about salary history and theoretically requires them to give a salary range to an applicant when asked. I say “theoretically,” because there’s no way for anyone outside the company to verify that the salary range they give is in any way related to the budgeted range.
It's particularly hilarious when you realise that some eastern Europe places outsource to the US Midwest because it's cheaper....
Thanks for the idea. As East European I'll use this opportunity to improve my English speaking skills (on the phone).