Warsaw software developers' job market has gotten really interesting since Google opened an engineering center here some umpteen months ago. There is just no reason to stick to crappy jobs at this time.
What makes you think Google is better?
Google pays decently, but the work isn't interesting unless you have social access. Being in an Eastern European satellite office, you're not going to get the machine learning work. You're going to get the stuff that California, Seattle and New York don't want to do.
I'm sure there are Polish companies that offer real work; OP would do better at one of those than in some multinational's branch office. The problem is that most corporations are still pretty colonial and you don't get high-quality work unless you're in the main office.