A JavaScript Developer is a Software Developer who specialises in the design, testing and implementation of software using the JavaScript programming language. JavaScript should not to be confused with Java - despite sharing similar names, the two are distinctly different programming languages.

JavaScript developers can target more platforms than any other high level language, as JavaScript is the most popular programming language with the richest OSS module ecosystem available. It is used to create interactive webpages, user experience, and responsive front-end design. Anything a user clicks, inputs, edits, or pulls up on a website is possible.