Scrivere alcuni Software - repost

I'm looking for a professional in order to develop and introduce a module inside a running prestashop website. At the moment, the page let users upload a file image, choose between 6 different printing supports, choose the size of the printing support (with fixed width and height pairs) and then add it to the cart or to the wishlist. We want to make some changes to that page, adding some features to the product (like the edge of the printing support, and color filters for the uploaded image), let the users selection width and height independently (no fixed pairs), change the rules that evaluate the prices (which are different for every material) and display a preview of the uploaded image. We have a demo of the service with the functions the module has to do, and we will provide it to the developer in order to understand what we exactly need. There is also a website that does these thing in a similar way, [login to view URL] Everyone able to do that can contact us and give us his/her fee for this project. We are also interested in a professional able to teach us how to do that during or after the job is done, and the additional price for the training. Thank you very much