Convert Website to White Label SaaS Solution

Hi, We have an existing website that holds Quiz/Practice Exams for users. We are looking for a developer who has prior experience creating a white labeled solution. In other words our functionality on website www.xyz.com can be used on another website www.abc.com. The abc.com domain will not host any code or data. Our servers will host all the data and code. Only reply back if you understand if you have prior experience in creating white labeled SaaS solutions. Example is user stores on Shopify, or educational LMS system like Kajabi, Teachable etc.