Change a Shopify Domain Name and Keep Same Google rank and same content

I am looking for someone to help me change the domain name of my existing Shopify website while maintaining the same Google rank and content.

Requirements:
- Experience with Shopify and domain name changes
- Knowledge of SEO best practices to ensure the Google rank is not affected
- Ability to transfer all content from the old domain to the new domain seamlessly

Skills:
- Proficient in Shopify and its backend functionalities
- Familiarity with domain name management and DNS settings
- Understanding of SEO and website optimization

Responsibilities:
- Assist in transferring the website content from the old domain to the new domain
- Ensure that all URLs and internal links are properly redirected to the new domain
- Implement SEO strategies to maintain the current Google rank
- Test the website thoroughly to ensure all functionalities are working properly after the domain name change

Note: I already have access to the old domain and will purchase the new domain myself.