E-commerce Backend Development

I'm looking for a skilled web designer with backend expertise to help develop a robust backend for my e-commerce Coupon site. The project involves:

- No user authentication features: The site will require login or admin authentication features.
- Credit/Debit Card Processing Integration: The main task will be to seamlessly integrate a Credit/Debit Card Processing payment gateway.

Ideal skills for this project include experience in e-commerce site development, backend programming, and payment gateway integration.