Shopify E-commerce Site Development

I'm looking for an experienced Shopify developer to design a high-converting e-commerce website.

Key requirements:
- Custom Shopify theme design
- SEO optimization for better search rankings
- User-friendly navigation and modern aesthetics
- Mobile responsiveness
- Integration of payment gateways

Ideal Skills:
- Proven Shopify development experience
- Strong SEO knowledge
- Graphic design skills
- Attention to detail and creativity

Please provide a portfolio with similar projects.