According to UAE law no one can work on a visit...

If your inquiry is about entering the UAE on a visit visa and work, find the following information:
According to the UAE residence laws, it is not possible to violate the purpose of entering the country. So, if you get a visiting visa, it does not allow you to work, even if you are under probation period.
Therefore, if you wish to work, the visit visa must be converted into a work visa