QA shopify website

I am looking to hire a freelancer to quality assurance test my shopify website. I would like the freelancer to test it for functionality and usability in particular, as well as performance. I have a general idea of what I want the freelancer to test, though I don’t have an exhaustive list. However, I trust the freelancer's judgement in being thorough and accurate in their testing process. The timeframe for this QA testing is one to two weeks.