Espresso servers, also known as baristas, are professionals who prepare and serve espresso-based drinks. They are knowledgeable in the art of coffee making and have a deep understanding of the different types of espresso and how to make them. Baristas are responsible for grinding the beans, tamping the grounds, and pulling the shots. They must also be able to steam milk and create latte art. Baristas must be able to work quickly and efficiently while providing excellent customer service.