On his , Marks said he had left but did not give details of his next job, except to say he would continue to work on open web standards -- something he spent a lot of time working on at Google, through projects such as OpenID, which allows users to have a single log-in to a variety of web services.
Marks is a software engineer who joined Google in 2007 to work on its social networking site Orkut.
He then moved on to Google Profiles before working on the development of OpenSocial, a standardised platform for building social networking applications.
He explained in his blog: "Realising that Google had thousands of engineers, but very few comfortable speaking in public, I became a developer advocate, working to bridge external and internal developers, explaining the Social web to Google and OpenSocial and more to the wider web community."
Before joining Google, Marks worked at companies including Technorati, Apple and the BBC.
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