Crear una aplicación para Android

I need someone who can create an application to manage purchases and secure sales between customers and suppliers, this application being the intermediary who is responsible for receiving the money from the customer through deposits of credit or debit cards and transfer it to the supplier at the time of the Customer confirm the arrival of the goods. - with a section to show profiles of providers as well as their contact number and reputation. -other section for customer profiles. - section for the registration of suppliers and clients with option of confirmation of profile through their bank card (address). -The app will take a percent has a paid for each deal. -section of sample of articles available with price, showing by category, for example; Clothing, toys, electronics..etc. -Each article would have its edition area, such as sizes, prices, place of origin, the manufacturer's mark and if there is any guarantee. The navigation would be something like this; -At the moment a member accesses the application show a welcome message and an introduction with the option to close the window, and not show it again to people who are logged in, then show the option to log in or give a view without registration, but This second one with the disadvantage of not being able to see contact numbers and the buy button not available (green button unassisted). - At some end of the window show a green button (register or login) for unloged in people. -And of course an area for the control of the application and completed transfers.. -Language in Spanish. Please if you have another price to make this app just let me know and we figure out.