Comment by cercatrova

Upwork is great, I found a lot of good Eastern European developers. I set the rates to at least 75 USD/hour however (which is a lot by Eastern European standards, and so it's very worth it to them), and I ask questions through the project proposal and the chat as to whether they know exactly how to solve my problem or not. This process weeds out most of the unqualified candidates. Perhaps you are not vetting thoroughly enough or not paying enough to be worth their time.