OS-Commerce Expert Needed

I'm seeking an OS-Commerce expert to assist with various tasks. I have a budget, and I'm looking for skilled freelancers.

Key Requirements:
- Experience with OS-Commerce, especially in custom module development, theme customization, or plugin integration.
- Familiarity with SEO optimization, security enhancements, and payment gateway integration.

Ideal Skills:
- Strong background in e-commerce platforms.
- Proficiency in PHP, MySQL, and web development.
- Ability to deliver high-quality work within budget constraints.

Please provide examples of previous work and a detailed proposal.