What word or phrase does your mother always say?
a person who works at the counter of a coffee shop; a coffee bar server
He plans to become a barista at Starbucks.
"bartender in a coffee shop," as a purely English word in use by 1992, from Italian, where it is said to derive ultimately from the English bar (n.2), as borrowed into Italian. The word is of generic gender and may be applied with equal accuracy to women and men (it is said that the typical barista in Italy is a man).