PHP Developer for E-commerce Site

I'm seeking an experienced PHP developer to create an e-commerce website.

Requirements:
- Develop a user-friendly, secure e-commerce platform.
- shopping cart functionalities.
- Design responsive layouts for mobile and desktop.
- Ensure SEO optimization for better visibility.
- Set up user account management systems.

Ideal Skills and Experience:
- Proficiency in PHP, MySQL, HTML, CSS, JavaScript.
- Strong understanding of web security protocols.
- Familiarity with SEO best practices.
- Prior portfolio showcasing similar projects.

Please provide relevant work samples and a brief project timeline.