Hi, I have read your description carefully and I think that the developer you are looking for is me and it is suitable for this task.
I would apprise you that I have extensive expertise in shopify Store Development, Extension Development, 3rd Party Gateway/App/Plugin/Script Integration, PSD to shopify Conversion and Theme Development.
I have worked with shopify Enterprise, shopify Go and shopify Community edition(s).
I hope after a thorough review of my past works shared above, you can have trust in abilities to successfully deliver this project.
Looking forward to a cheerful response.
Warm Regards,