e-commerce app developer

we're looking for a long-term app developer on Fluter to make a simple app on both platforms IOS and Android and add two main shopping API apps those that do not provide shipping to our country as we want a simple e-commerce app to make it easy for our people to purchase online goods from Aliexpress and Trendyol by using API or other to add all product inside those two apps to our app with adding some changes of price and shipping service.