Fultter Mobile App for eCommerce store

hi,

i am looking for the individual or small team who can develop mobile application for android/iOS using Flutter technologies.

i have basic requirement for mobile application for our existing shopify store.

Basic Mobile App Features Version 1:

1. List or Show Products - Filter Products - Main Screen
2. Add to Cart - Maintain Cart Products
3. Login / Signup - to place order
4. Place Order - Manage Old Order
5. Design and Implementation
6. Create API's to integrate with existing website if needed - normally shopify provides.
7. Payment Integration - Android - or we can redirect to website and return back etc
8. Payment Integration - iOS - in App Purchase - or we can redirect to website and return back etc
9. Android app deployment / publishing
10. IOS app deployment / publishing

i am expecting best pricing and time estimate.
budget $1000-$1200
timeline 4 weeks

anyone who is interested share his past work with ecommerce app and estimate.

note: submit your proposal with word "flutter-google" otherwise it will be rejected directly.

thanks