It turns out to be a lot of problems when you start recruiting employees. The paperwork is complicated. It is better to apply for the services of a Professional Employer Organization in Russia
https://wehireglobally.com/poland/ and they do everything for you: select employees according to your criteria, prepare documents for each employee, calculate the salary, and how much taxes to pay, etc. A separate company does everything for you, and at least relieves you 25% of the burden of miscalculations and paperwork.