Need a redesign of my existing iOS app built with Ruby and Objective-C

Hi. I have an existing iOS social media app built with Objective-C and Ruby. We are "pivoting" and looking to change the app into an ecommerce marketplace. We need someone to: - Create the frontend and backend for the ecommerce portal in our application and website. On the backend you will just be integrating Braintree's API into our application, but on the front end we would need a cart and a way for vendors to create buy pages. - Add the ability for users to sign-up as a vendor and sell items, similar to Tictail. - Our application is a picture based app. We are looking to do something similar to what Houzz does with their price tags - vendors are able to put "stickers" on their images which serve as touchpoints that users can click on and takes them to a buy page in the app. - Add the ability for users to send messages to vendors. Currently there is a direct message ability in the app but it is just to share pictures and you can only interact if users follow each other. We'd need a text based way for customers to communicate with vendors ideally in app. - There is currently no score or point system with the app. Users need to be given "points" for images they "like." 1 like = 1 point. Users will then be able to redeem points for a discount on products purchased in app. - Add additional e-mail and push notifications for in-app messages and purchases, and - Build a website with the Ruby code similar to our existing wordpress website. We'd like the website to display user content similar to Twitter and other apps (i.e., if username "Shop123" creates an account in the app, we would like "[login to view URL]" to automatically populate with the user's content). We're looking for someone experience with ecommerce projects, Ruby, and Objective-C to assist with this immediately.