This type of software development involves all the parts of a website that a user can see and interact with. In designing a site, the goal of front-end developers is to make sure that the format is easy to read and navigate.
Back-end development focuses on servers, applications and databases. Developers build and maintain the technology that powers those three components using a multitude of programming languages, libraries and other existing software. For complex websites that require features outside of front-end capabilities, back-end development is a necessity.