Hiring freelancers for an online business

To whom this may concern,

I am a Canadian citizen living in Al Ain city in the United Arab Emirates. I am currently thinking of starting an online business similar to "Talabat.com" if you know it except it will not be a food service. I have some people in mind that can work with me as freelancers but at the same time, I am wondering what are the rules to follow as an expat regarding this issue.

I don't know if I need to draft up contracts etc. I just want to be on the safe side. I'd love to hear back from you.

Regards,

M