A Front-End Programming Developer designs and builds the user interface of a website or application. This involves developing a functional and aesthetically pleasing design that provides a user-friendly experience. They utilize coding languages like HTML, CSS, and JavaScript to create visual elements, layout, and features that users interact with. They also ensure the interface is responsive for various devices and browsers. Additionally, they often work with back-end developers to integrate server-side code to create a fully functional system. They must also debug issues, optimize performance, and maintain the quality of the application by conducting regular tests.