Cross-Platform Course Selling App Development

I'm looking for an experienced app developer to create a mobile app for selling courses. The app needs to be developed for both iOS and Android platforms.

Key Requirements:
- Intuitive UI/UX for easy navigation
- Secure payment gateway integration
- User profiles and course tracking
- Admin panel for course management
- Search and filter functionalities

Ideal Skills and Experience:
- Proficiency in React Native or Flutter
- Strong background in mobile app development
- Experience with secure payment integrations
- UI/UX design expertise
- Previous work on e-commerce or course selling apps

Please provide a portfolio with relevant projects. Looking forward to your bids!