E-commerce Platform and Mobile App Development

I'm looking for an experienced developer to build an e-commerce platform, with a strong focus on product sales, service bookings, and digital downloads. The platform should be accessible through both Android and iOS, hence requiring the development of a responsive website and associated mobile applications.

Key requirements:
- Development of a user-friendly e-commerce platform that supports product sales, service bookings and digital downloads. with mobile and desktop compatibility.
- Creation of mobile applications compatible with both Android and iOS platforms.
- Integration of a secure payment gateway, specifically for credit and debit card processing.
- Logistics requirements such as live order tracking
- Easy API integration
- 3-tier platform with super admin user (for approvals and analytics), merchant user (for upload and analytics) and end-user (for full profile, favorites and full cycle of online shopping with online confirmation and invoice generation) sides
- Categories and product uploads
- Dynamic marketing of products/merchants/services that can be updated by admin and promo code generation
- Inventory and stock management with accurate and real-time updates
- Unlimited merchants and products - high storage needed or in phases
- Loyalty or wallet program

Ideal candidates should have:
- Proven experience in developing e-commerce platforms and mobile applications.
- Proficiency in working with Android and iOS platforms.
- Deep understanding of payment gateway integration, particularly with credit and debit card processing.
- A keen eye for UX/UI design to ensure a smooth shopping experience across web and mobile platforms.
- Time efficient and delivers as promised

If you're confident in your ability to deliver a high-quality e-commerce platform that meets the above requirements, I'd love to hear from you.