I have got a Degree in Chemical Engineering
Can't tell much in details about this field. But generally Warsaw is more a financial/media centre, not much industry over there... Besides, generally without speaking Polish, there are some opportunities but mostly related to IT/finance. You can go to pracuj.pl select Warszawa and look for offers in English, should be 15-20% of total, in many cases they still require fluent Polish but not always.
Some from the top pages:
Except senior positions, relevant edu/experience is not the must. For 9 out of 10 of CVs sent out, you won't hear a word from them, but that's a norm here. Besides, in Warsaw there are thousands of job openings all the time.