Work / info. work in Poland with and temporary card residence? [5]

Hi
Iam from north africa and i am non eu citizen.
a close family friend who is a polish citizen has a well established buisness within my experties in poland, and i've been asked to join him as he has a bigger vision of expanding and taking his buisness to another level if we would be working together, so i would like to move to poland.

I currently have a french tourist visa that will expire in couple months.
please advice as what steps need to be taking and possible obsticles to face when applying for a temporary resident card in poland.
Thank you for reading.