hired hand
One who is hired specifically to work on or help with something. Although often associated with farm work, the phrase can be used more broadly. With a few more hired hands, I think we could get this job done by the end of the week. I need a hired hand to help with the cows.
hired hand
Also, hired man or girl . A person engaged to assist with farm or domestic chores, as in We need extra hired hands during the harvest, or She was looking for a hired girl to do the laundry. This use of hired dates from the 1200s and referred to someone employed for wages as opposed to a slave or serf. The use of girl now may be offensive.