NEED sign design website interface commission based!

Need a long term relationship with the right site developer. The right person will enjoy a generous commission schedule based on completed online sales. Our company has been succesfully selling signage as well online as offline through our location. We are looking for a freelance designer who can push our online sales to the next level. We are looking for a designer who can develop a site with a user interface for the client to design their own signage online and keep the site running. Interface must give the customer the ability to upload, edit and preview their design online. The interface must give the customer the ability to start the design process, upload their logo/images , order and pay all online in easy steps. If you have the skills and are looking for a long term relationship please respond to this ad. The right person will receive a generous commission on every sale made online. Developer must be US based and contract will be provided upon agreed terms. Thanks