Android E-commerce App Development

I need an experienced mobile app developer to create an e-commerce app for Android.

Key Requirements:
- User-friendly interface
- Secure payment gateway integration
- Product listing and search functionality
- User authentication and profile management
- Order tracking and notifications
- Review and rating system

Ideal Skills and Experience:
- Proven experience in Android app development
- Strong background in developing e-commerce applications
- Expertise in UI/UX design
- Knowledge of secure payment systems
- Familiarity with backend technologies and databases

Please provide your portfolio and relevant project experience.