There are a number of British and American companies that have their offices outsourced in Kraków. Might want to ask around there or check out websites of companies along the lines of Sate Street, Alexander Mann, International Paper, IBM, etc. A lot of them have English as a required skill and they are happy if you can speak another language.
Related:Multinationals companies in Krakow area?
Does anyone know what international / multinational companies are located in the Krakow area and are hiring people from abroad?
Hi I know that Shell, IBM are in Krakow and I think Google either have or will have an office there.