Custom E-commerce Site Development

I'm seeking a skilled web developer to create a customized e-commerce website for selling physical products. The site needs to be user-friendly, visually appealing, and secure.

Key Requirements:
- Secure payment gateway integration
- Intuitive navigation and search functionality
- Mobile-responsive design
- SEO optimization
- Customer account creation and management

Ideal Skills and Experience:
- Proven experience in building e-commerce websites
- Strong knowledge of payment gateways
- Expertise in SEO and UX/UI design
- Familiarity with mobile-responsive frameworks

Please provide a portfolio of similar projects and an estimated timeline.