SEO Specialist Needed for E-commerce Site (Consultant)

I am in need of an SEO professional who can help improve my e-commerce website's search engine rankings, specifically on Google.

The ideal freelancer will have experience with:
- On-page SEO: Enhancing content and keywords to boost visibility and relevance.
- Technical SEO: Improving site speed and mobile-friendliness to enhance user experience and meet Google’s criteria.
- Off-page SEO: Generating quality backlinks and leveraging social media to increase site authority and reach.

My main objective is to enhance my website's position in search engine results, which in turn should lead to increased website traffic and ultimately, higher online sales.

Please provide examples of your previous work and the results achieved.