Optimize & Secure WordPress Site with Divi

I need a skilled WordPress developer to enhance my website's performance and security. The site is built with the Divi theme.

Key Tasks:
- Improve Page Load Speed
- Reduce Server Response Time
- Optimize Images and Media

Preferred Tool: W3 Total Cache
But this can be another plugin too as long as it gets the job done

Security Measures:
- Implement a Firewall
- Set Up Regular Backups
- Conduct Malware Scanning
- Install SSL certificate

CDN necessary or not?

Ideal Skills and Experience:
- Proven experience with WordPress, Divi theme, and W3 Total Cache
- Strong background in website optimization and security
- Familiarity with firewall setups and backup solutions

Please provide your portfolio and relevant experience. Thank you!