Lachlan Hunt worked as a front-end web developer, primarily developing with HTML, CSS and JavaScript, for 4 years until joining Opera Software in late 2007.

As a developer and advocate of web standards, he has participated in the WHATWG and various W3C working groups, including Web Applications and HTML Working Groups. In these groups, he actively contributes to the work on HTML 5 and is the editor of Selectors API and The Web Developer's Guide to HTML 5.