Shopify E-commerce Sitebenar

I need a Shopify e-commerce site developed.

Essential requirements:
- User-friendly interface
- Secure payment gateway integration
- Mobile responsiveness
- SEO optimization
- Product categorization and search functionality

Ideal skills and experience:
- Proven Shopify development experience
- Strong design skills
- Knowledge of e-commerce SEO
- Familiarity with payment gateways

Please provide examples of previous work.