Flutter App for Magento 2 Marketplace

*****KNOWLEDGE OF FLUTTER AND MAGENTO 2 IS A MUST****** I would like to expand the functionality of my Magento 2 Flutter app to include the marketplace multi vendor. I also have the Marketplace API to integrate into the Magento 2 app. On my customer flutter app I want to expand, I would like to add 1) Seller Screen (Create New Screen) On Seller screen, I would like - Seller Profile Screen (With follow seller function) - Seller All Products Tab - Seller Categories Tab - Seller Rating - Seller Info Tab, Shipping Policy, Return Policy 2) Product Category Screen (Expand Screen) On Product Category screen with product grid, I would like to include - Seller name (Sold by xxxx) and rating (*4.9) - Also available from this sellers 3) Product Screen On Product List screen, I would like to include (Expand Screen) - "Make Offer" Button next to "Add to Cart" Button on Product Screen. see website for details - Integrate Auction function. - Seller details section (Seller Name, Number of products, Number of followers, Seller rating) - Seller price comparison (Assign products) (Also available from this sellers) - Other functions as available on the site. 4) Also available Sellers Screen (Create Screen) On Available sellers screen (Linked from Product List Screen or Product Category Screen) - List of other sellers (seller name, rating, product availability info, Price, Buy Button) 5) Cart & Checkout Screen (Screen Update) - Seller name on product in cart - Product Order breakdown by Seller 6) Integrate Payment Gateways 7) Seller orders app for seller management Knowledge of Magento 2 and Magento 2 API is a must. Knowledge and Experience in Flutter and Dart programming is a must