E-commerce Website with Integrated Mobile App

I'm launching a new company and need an e-commerce website integrated with physical product sales. The site should be linked with major platforms such as Amazon and Flipkart. I also need a mobile app for my partners, which will facilitate tracking of cashback, redeeming gifts, and receiving promotional notifications every time they purchase our products.

Key requirements:
- E-commerce website developed with integration for Amazon and Flipkart
- Mobile app development with specified features
- Understanding of physical product e-commerce

Ideal skills and experience:
- Proven experience in e-commerce website development
- Expertise in mobile app development
- Familiarity with Amazon and Flipkart integration
- Prior work in creating cashback and promotional tracking systems in apps