Work / The concept of an independent contractor in Poland [4]

I am in Warsaw now and was helped by someone who just graduated from college, a young man who appears to be pretty smooth when interacting with people both in english and in polish. I am also inclined to hire this guy to work as an independent contractor in Poland, however i am concerned about the actual control we may have over this guy considering the fact that we are all away from Poland.

The questions we have are: (i) does Polish law recognize "independent contractor," a concept widely accepted in the US? (ii) is contract a respected practice for business in Poland? and (iii) what kind of practical suggestions you all may have regarding the administrative control we may potentially exercise over him (to make sure he does not do things negative to our business interest nor does things under our company business name but really for his personal gain)?

Probably not easy questions, but i think they are common questions facing foreign business operations here...Thanks in advance for any input!