Full stack web development is the practice of working on both the front-end and back-end of a program. Full Stack is a layer of software or web development consisting of the front-end and the back-end portions of an application. Front-end is what the users will see or interact with on your application. Back-end part is what users do not see, such as application’s logic, database, server, etc. A full-stack web developer is comfortable working with both back-end and front-end technologies which make a website or application function properly.