I would pick Poland out of these because of human capital, property rights, rule of law(*), etc.

{*} Yes, I understand the EU is accusing Poland of not respecting rule of law because Poland asserts that Polish laws take priority over EU laws when there is a conflict. That's a pis*ing competition about globalism versus nationalism and not about rule of law per se.

Everything you said was true

We have quite a few folks in Poland (and not in the others). I think you're soft-peddling the potential future issues with rising Polish nationalist politics rather a bit, but so far it's worked well for us for the reasons you state.

How can you talk about Belarus and ignore the elephant in the room?

Also, there's a strong trend of Belarusian IT moving to Poland because of said elephant.

Many moved to Ukraine too.

Sorry, I didn't read your 20-pages presentation.

I deal from time to time with people from Poland: some do really want to be helpful + are extremely competent + take over ownership/responsibility, others are the opposite => up to your HR department & you to identify the right people. In general they love to talk and are likeable people, many have a drive to really deliver stuff :)

No idea about Romania & Belarus - I would be careful as as much as I know they aren't hosting competence centers for any major company (but I might be wrong).

Personally I would especially take into consideration as well the Czech Republic, but that's just my personal opinion.

Why only those options? I know if two growing startups doing Czech. I'm not a big fan of more than 40 hours a week, but if you want people who want to do that, Czech is your place.