E-commerce Website Development on Shopify

I'm seeking a skilled web developer to create an E-commerce site for me on the Shopify platform.

Key requirements:
- Extensive experience in Shopify website development
- Proficiency in e-commerce website design and functionality
- SEO and mobile optimization expertise
- Skills in integrating payment gateways and shopping carts

Please include examples of previous E-commerce websites you have created on Shopify in your proposal.