Mobile App for grocery store

I am looking for a mobile app developer to create an order tracking app for my grocery store. This app will be used to allow customers to place orders within the store for pickup or delivery. It will need to have a barcode scanner for product scanning and a payment system for order processing. The app will need to work on both iOS and Android devices. The developer should have experience with creating mobile apps that have similar functionality. The developer should be able to work quickly and efficiently, and have excellent communication skills. The deliverable should be a mobile app that is intuitive, user-friendly and ready for use.