E-commerce Website Development

I'm looking to build an e-commerce website for selling physical products. The primary feature I need is payment gateway integration.

Key Requirements:
- Design and develop an intuitive e-commerce platform
- Integrate secure and reliable payment gateways
- Ensure mobile responsiveness and user-friendly navigation

Ideal Skills and Experience:
- Proven experience in building e-commerce websites
- Strong understanding of payment gateway integration
- Familiarity with SEO best practices and mobile optimization
- Good design sense for a modern, clean look

Please provide examples of previous work and a timeline for completion.