E-Commerce Website Development

I'm looking for a professional web developer with extensive experience in E-commerce website development. The primary purpose of this site will be for e-commerce, so a focus on usability and a smooth shopping experience is paramount.

Key Requirements:
- Implement a user-friendly shopping cart and checkout process
- Design engaging and detailed product listings
- Ensure seamless navigation throughout the site

Additionally, I need expert assistance in setting up a secure and reliable payment gateway.

Ideal Skills:
- E-commerce website development
- Payment gateway integration
- User experience (UX) design
- Search engine optimization (SEO)

Please share examples of previous E-commerce sites you've developed.