A person who prepares and (also, generally) serves espresso-based coffee drinks. The term barista is also often applied to coffee shop employees who prepare both espresso and coffee drinks. Beyond making espresso, baristas also generally foam, froth and steam milk to make a wide range of espresso-based drinks and prepare coffee drinks, such as French press coffee and drip coffee.
Many baristas are very proud of their abilities and spend years sharpening special techniques to create the perfect drink. This obsessive tendency to improve one's craft leads locally and internationally. So, with the same passion, as an art worker, we must also be like that.