I am looking for an experienced WordPress website designer to create a modern, fully responsive, and mobile-friendly website for my business. The website should be optimized for both desktop and mobile devices, ensuring seamless user experience across all screen sizes. Key requirements include:

• Custom Design: A clean, modern design that aligns with my brand identity, including custom themes and graphics.
• Responsive Layout: A mobile-first approach, ensuring the site adapts perfectly to all devices (smartphones, tablets, desktops).
• SEO Optimization: On-page SEO to improve search engine visibility and ranking.
• Fast Loading Speed: Optimization for quick load times to enhance user experience and SEO performance.
• E-commerce Integration (if applicable): Setup for secure online transactions with an easy-to-use shopping cart and checkout process.
• Content Management: Easy-to-use CMS for effortless content updates and blog management.
• Security Features: Integration of necessary security measures (SSL, firewalls, etc.).
• Performance Testing: Comprehensive testing for responsiveness, functionality, and cross-browser compatibility.

Please include examples of previous WordPress projects with responsive design. I'm looking for someone who can deliver a visually appealing, high-performing website that is also easy to maintain in the long term.