WordPress E-commerce Site Design

I'm looking for an experienced WordPress developer to design an e-commerce website for selling physical products. The site should be integrated with PayPal for payment processing.

Key requirements:
- WordPress expertise and maintenance
- E-commerce functionality
- PayPal integration
- User-friendly design
- Mobile responsiveness

Ideal skills and experience:
- Proven WordPress e-commerce projects
- Strong design portfolio
- Familiarity with PayPal integration
- Mobile-first design approach

Please provide examples of similar work done and an estimated timeline.