E-commerce App and Website Development

I need an experienced developer to create an Android e-commerce app and a complementary online store website.

The Android app must include:
- Product catalog
- Shopping cart
- Payment gateway integration

The website will serve as an online store with app integration.

Ideal skills and experience:
- Proven experience in developing e-commerce Android apps
- Strong knowledge of payment gateway integration
- Experience in creating online store websites
- Ability to ensure seamless integration between the app and website
- Strong UI/UX design skills to create an attractive and user-friendly interface