SEO and Speed Optimization Specialist Needed

I'm seeking an expert to resolve performance issues affecting my sales and revenue.

Key Areas to Address:
- Advanced SEO: Primarily keyword optimization.
- Speed Challenges: Improve site loading times for a better user experience.
- Mobile Responsiveness: Need to identify and fix any issues.

Ideal Skills and Experience:
- Proven track record in SEO, especially keyword optimization.
- Expertise in site speed optimization.
- Experience with responsive design across various devices.
- Strong analytical skills to identify and resolve issues.

Please provide examples of previous work and relevant qualifications.