Good day Sir,
Expert PHP/MySQL/HTML5 developer at your service. I can create a PHP backend based on a solid, well-known framework that will allow us to run this kind of operations. I can create it as a RESTful API or just a simple web app. My major concern here is regarding the front-end, do you have any existing UI/UX? Do you have some mock-ups? Does it need to be branded?. Although we are expert front-end developers, we do not design. Let's discuss further details.
Thank you so much for your time and attention.
Regards,
Raú