Google Ads / Shopify SEO

I am looking for a freelancer who can help me with my business' Google Ads and Shopify SEO needs. I want to focus on both equally, as I feel this is the best way to achieve maximum success. My target audience is international, so the freelancer should have experience working in this arena. For this project, I am looking to hire someone on a monthly retainer basis. The budget will depend on the proposal offered.