E-commerce Website Development

I need an experienced web developer to create a robust e-commerce website.

Key Requirements:
- Custom design tailored to my brand
- User-friendly navigation and checkout process
- Secure payment gateway integration
- Mobile-responsive design
- SEO optimization

Ideal Skills and Experience:
- Proven experience in developing e-commerce websites
- Expertise in Shopify, WooCommerce, or Magento
- Strong knowledge of web security protocols
- Familiarity with SEO best practices
- Excellent design skills

Please provide a portfolio of similar projects completed.