Mobile E-commerce App Development -- 2

I'm looking for an experienced mobile app developer to create a robust e-commerce application. The app should be user-friendly, secure, and scalable.

Key features required include:
- User authentication (signup/login)
- Product listing with search and filter options
- Shopping cart and checkout process
- Payment gateway integration
- Order tracking
- User reviews and ratings
- Admin dashboard for inventory management

Ideal skills and experience:
- Proven experience in mobile app development, especially for e-commerce
- Strong knowledge of payment gateway integration
- Familiarity with user authentication and data security protocols
- Experience in creating admin dashboards
- Excellent UI/UX design skills

Please include examples of previous work and a timeline for project completion.