Build a Blockchain based web portal and android app with payment integration ( To verify payment Bills )

Hi , I hope you are doing well. I want to you to create website and android app. The theme of the website is customer will upload bills and store in his profile and further customer can also post advertisement in the website in Post an AD section of customer profile and customer can also view other second hand products which published by other consumers like Facebook Marketplace. ( Each and every product which uploaded on website has to be blockchain tagged ). Thankyou.