I have a Magento website that I need responsive theming done on. The work will only require CSS and Jquery - no PHP. It will definitely help if you know mangento, but since no PHP will be involved, it's not vital. I have setup a dev site, and there is an existing theme that has been tested in desktop browsers - this work will only require mobile and tablet theming. We do not have a separate mobile theme, so it will be the same theme, but using CSS media queries.