Shopify E-commerce Site Development

I'm seeking an experienced Shopify developer to create a product-based e-commerce website for selling physical products.

Key Requirements:
- Build a user-friendly, responsive Shopify store
- Integrate secure payment gateways
- Set up product categories and listings
- Implement SEO best practices
- Ensure mobile optimization

Ideal Skills:
- Proven Shopify development experience
- Strong design and UX/UI skills
- Knowledge of SEO and e-commerce best practices
- Experience with setting up payment gateways

Please provide a portfolio with relevant work.