Creative Image Editor App for Shopping Page

We are developing a social shopping website with our tech team. We want to develop an editor application for our website that will drag and drop items from our library onto a canvas. The white background from those items should be automatically removed during the process of dragging and dropping the items onto the canvas. Once the items are on the canvas, users should have the ability to increase/decrease/ rotate the items. Users should also be able to overlap the items on the canvas. Other elements required can be discussed. We do not want the editor built in flash. Ideally it should be built in html5 or similar that uses touch events so that it can also function on iPad. We will provide the design of the editor and implementation for the editor and require only the coding for the functionality. Although not the same as we require, a sample of the basic functionality of the required editor application can be found at [login to view URL] You must have experience in building this type of editor and provide us with examples of your work in that regard, and yes this work needs to be done in zend framework. The successful candidate for this job will work directly with a member of our tech team who will implement the required editor into our system. This is a serious offer from an an exciting new website.