Shopify - App developer

Dear Freelancer,

I'm looking for a developer who can create me a Shopify app with similar functionality as excelify.
This is excelify

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You can download a free trial of Shopify and free trial of Excelify to check out the application.
Here is a video instruction:

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Please send me why you are a fit for this position and how much you would request to develop this app with similar functionality as excelify.

Thank you,

Kind Regards,?
Guilherme Toledo
HR Manager