Work / Job opportunities in Poland for a foreigner? (other than a teacher) [175]

Hello. I'am a greek native speaker boy 23 years old and the last months i live in poznan with my girlfriend.
I'am looking for any job in poznan.I don't speak polish but i speak well english language.
I'am graduated in a nursing university in greece and i have good computer knowledge too.
What job opportunities can i have?..There is any job in poland where they need a greek speaker?

Thanks, Giorgos