Flutter-Based Grocery App Development

I'm looking for an experienced Flutter developer to create a grocery app that supports both iOS and Android platforms. The app should cater to three user roles - Customer, Admin, and Delivery Personnel.

Key Requirements:
- Development of a user-friendly product catalog for customers
- Implementation of a shopping cart feature
- Creation of a robust order tracking system
- Admin interface for managing inventory, orders, and users
- Delivery personnel interface for tracking and managing deliveries

Ideal Skills:
- Proficient in Flutter with a strong portfolio of cross-platform applications
- Experience in e-commerce app development
- Understanding of UI/UX principles for mobile applications
- Knowledge in implementing role-based access in apps
- Familiarity with order tracking systems

Please provide examples of similar projects you've completed in your proposal.