Modern E-commerce Site Design & Optimization

I'm looking for a skilled professional to design and optimize a modern and sleek e-commerce website. The site should be user-friendly and visually appealing, with seamless integration of payment gateways, social media, and shipping providers.

Key Requirements:
- Modern and sleek design
- E-commerce functionality
- Integration with payment gateways, social media, and shipping providers
- Mobile responsiveness
- SEO optimization

Ideal Skills & Experience:
- Proven experience in e-commerce site design
- Strong knowledge of payment gateways and shipping integrations
- Expertise in modern web design
- SEO knowledge
- Familiarity with social media integration

Please provide a portfolio showcasing similar projects.