Long-term E-commerce Web Design

I'm seeking an experienced web designer to create and manage an e-commerce site on a weekly basis. This is a long-term project.

The site must include:
- User accounts
- Payment gateways

Ideally, you should have:
- Strong experience in e-commerce platforms (Shopify, WooCommerce, Magento)
- Expertise in setting up user accounts and payment gateways
- A portfolio showcasing previous e-commerce projects
- Ability to commit to a long-term partnership and weekly collaboration

Please provide samples of your work and a brief outline of your approach to this project.