A full-stack developer is an engineer or developer who works on both the front end (client side) and the back end (server side) of a website or application. They may be in charge of projects including databases, APIs, or developing user-facing websites, as well as dealing with customers during the development process. A full-stack developer assures the application's efficiency, reliability, and other critical qualities in addition to designing the front-end and back-end. They can help at all phases of website or application development because of their adaptability and time management abilities. They are also knowledgeable in UX/UI design, web servers, and databases.