E-commerce Site Development

I need an experienced web developer to create an e-commerce website for selling physical goods. The site must include payment gateway integration.

Essential requirements:
- User-friendly interface
- Secure payment processing
- Mobile responsiveness
- SEO optimization

Ideal skills and experience:
- Proven e-commerce website development
- Familiarity with payment gateways
- Strong background in UI/UX design
- Knowledge of SEO best practices

Please provide samples of previous work and a detailed project plan.