A full-stack developer is a type of programmer that has a functional knowledge of all techniques, languages, and systems engineering concepts required in software development. The term “full-stack” refers to the technologies and skills needed to complete a project, with each component being a stack. Stacks can be mobile, Web, or software specific.Typically, a software engineer will focus on one part of development, either the front end or the back end. The front end includes all components associated with the visible parts of an application or website, while the back end encompasses the underlying databases and infrastructure. The full-stack is a hybrid of both.