I have a cousin who has a small SaaS business out of Belarus, and he says the top end of what he pays his devs there is $500, which is quite a bit lower than the numbers you're quoting here.
This is relevant to Ukraine in what way? I have unbelievably huge doubt that a Senior Java Developer with fluent English is making 500 in Belarus. Wargaming is Belarus company and they pay 50K in Kiev for Senior Python Developers and have a large office there. First random article on the subject http://goaleurope.com/2016/09/26/15960-software-developers-s...
EPAM generally quotes lower salaries vs what they actually pay as they think it helps set expectations in the market.