E-commerce App Needed for iOS & Android with Backend Portal

Hello, i am looking to develop my e-commerce application. It is a basic app with features such as cart, wishlist, products, categories and payment gateway integration. I have the app designed with all assets and screens ready on zeplin to be provided to the developers. The frontend of the portal will also be provided along with the developer accounts and hosting server. Primarily i need developers to build the app at a reasonable price.