Full-stack developer creates the user-facing or front end and the back end of web applications like a client. The front end, often known as a “client-side” software application, has to do with graphical user interfaces (GUIs) for what users see and interact with, primarily created in HTML and CSS via JavaScript. A back end, known as the “server-side” of a web application or server software, serves as the underlying logic of the web application, integrates with the database server, and processes the requested data so that it can serve the requested data to users from the server to the client. The back end manages the communication of user requests to and from the front end/server through server-side programming languages such as PHP, Ruby, Java, and Python. Therefore, a full-stack developer ensures that the visual representation (GUI) and the more complicated part behind the scenes (server-side programming) work together to form a complete system.