Digital Fashion E-commerce Store Setup

I'm looking for an experienced e-commerce developer to help create an online store selling digital clothing.

Key requirements:
- User-friendly interface
- Secure payment gateways
- Digital product delivery system
- SEO optimization
- Mobile responsiveness

Ideal skills and experience:
- Proven e-commerce development
- Familiarity with digital product sales
- Strong SEO and UX design knowledge
- Experience with secure payment integrations

Please provide a portfolio with relevant projects.