During the week I work as a barista at Portuguese restaurant.
Ahhh, the Barista. That is Italian for bartender. But, as you know, it is now used for coffee shop workers.
It is often used for coffee shop workers. I think barista has evolved into many things these days in the hospitality industry. It is the title that I use at my place of employment.
Yes. In Italian female barmaids were called baristes.
Well now the term is genderless. It can apply to both females and males, at least it does where I work. 
We aim for gender neutrality these days, so we used gender less language to avoid referring specifically to males or females.
I think that is a good thing. I personally prefer to call myself a server though. I think the word barista is a little old school.
eliminate gender distinctions, such as gender-neutral bathrooms, with public restrooms being available without distinguishing the gender of the person using them. It has been observed that gender neutrality in the law has changed the nature of custody disputes, making it more likely that men will be awarded custody of their children in the event of a divorce.
The legal definition of gender has been a controversial topic particularly to transgender people; in some countries in order to be legally defined as a new sex people must first undergo sterilization.
button operation to an involved manual process. Espresso is a notoriously finicky beverage, and good manual espresso making is considered a skilled task. Further, preparation of other beverages, particularly milk-based drinks such as cappuccinos and lattes, but also non-espresso coffee such as drip or press pot, requires additional work and skill for effective frothing, pouring and most often latte art.
The barista usually has been trained to operate the machine and to prepare the coffee based on the guidelines of the roaster or shop owner,