HTML5 canvas graphical browser 2D Product configurator

We are looking for someone to build a 2D Product configurator to configurate pen and key tags. The configurator should be coded in JavaScript and display graphics using the HTML-canvas. You will be required to create composite images using different components and artwork specified by the users. It should be possible to upload your own pictures, crop them online and they should be displayed on the pen or key tag. Some of the pictures should be able to be moved inside the pen and be displayed by an animation. I have attached an example of the design for the configurator (The example is with a poster instead of a pen - but it is the same principle). You will be given the code of this configurator if it helps you. In regards to the data, the application will get a JSON-object from the server which the configurator should be based on. For development purposes you will get a premade JSON object, but the configurator should obviously work for other data, as this will be created dynamically for production. As output the configurator should make another JSON-object which will be processed by the server. Specifications for this will be provided. Please check following. [login to view URL]