A full stack is the front and back end of an application. It is comprised of a computer system, a programming language, database software, and a computer server. As an entry-level full stack developer, your responsibilities consist of developing something on behalf of a client. In an entry-level full stack developer role, you may help build an SQL database, a JavaScript application, or a PHP database on a server. Your qualifications should include a general knowledge of every level of software development as well as one or more common programming languages such as HTML, CSS, Python, and SQL.