Hi,
I am carefully reading your project description. very good experience in Shopify.
I am a professional website designer/developer. I have (8)years of experience in this field and can provide you my past sample work.
I am expert in the following , HTML 5 , CSS 3 , Bootstrap , Responsive Web Design , Shopify etc.
my portfolio here: https://www.freelancer.com/u/abhiime
Thanks
Abhishek