Multilingual WordPress Site Optimization

I'm seeking a skilled WordPress expert to optimize my multilingual, multivendor WordPress site.

Key areas of improvement include:
- Speed and Performance:
- Reduce page load time
- Improve server response time
- Optimize images

- SEO and Visibility:
- Enhance keyword optimization
- Refine meta tags and descriptions
- Build backlinks and improve outreach

Ideal Skills and Experience:
- Proven experience with WordPress, especially multilingual and multivendor setups
- Strong understanding of SEO best practices
- Expertise in performance optimization tools and techniques
- Familiarity with image optimization plugins and services

Please provide examples of previous work and a strategy outline.