E-commerce Wordpress Site Development

I'm looking for an experienced Wordpress developer to build an e-commerce website. The site is designed to facilitate online sales and needs to be user-friendly and secure.

Key requirements include:
- Shopping cart and checkout functionality
- Integration with PayPal as the payment gateway

Ideal skills and experience:
- Proficiency in Wordpress
- Experience with e-commerce site development
- Familiarity with PayPal integration
- Strong understanding of user experience design

Please provide samples of previous work and estimated timelines.