Nutricionist Responsive System

I need someone to develop a system that should be 100% responsive and works great with the BA platform for building mobile apps. The system is web based but fully responsive. In the front end the patient will have to options, log in with username and password or buy a nutritional plan. If they choose the log in option they will see the PDF file with their diet and shopping list, they can donwload the file or send it to their email. If they choose to buy a nutritional plan, the next step is a page where they need to answer some questions and we will suggest the best diet for them, after they should continue and go to PayPal to pay for the plan, after we will redirect and show them the PDF and also send them a copy via email. This should create a username and password so they can login again and retrieve their diet. In the backend the nutritionist should be able to create usernames and password for actual clients and assign the their diet from a database that the nutritionist will also upload. On the other hand the nutritionist should be able to upload the pdf diets and characteristics to assign based on the answer the clients give in the buy option. If you need more information just let me know. If you speask spanish is PLUS If you have experience with the BA platform is a BIG PLUS.