E-commerce Android App Development

I'm looking to develop an e-commerce Android app. I have a basic idea but need help with designing the app.

Essential features should include:
- Shopping cart
- Payment gateway
- Product search and filters

Ideal skills and experience:
- Proven experience in developing Android e-commerce apps
- Strong understanding of UX/UI design principles
- Expertise in integrating payment gateways
- Ability to implement robust search and filter functionalities

Looking forward to your bids!