Shopify API Dev

I need a shopify dev who knows shopify api very well. When I say very well I mean you work with shopify api almost everyday . If you have zero feedback on shopify please don't bother posting your bid as I am not going to look onto it. I am creating a shopify app so you need to do some work using shopify api includes 1) Current Visitor Details Feed 2) 6 Graphs which shows on analytics, I want them showed from my app ( My app collects data as well ) 3) Some changes on data pulling so it shows sale , products viewed etc. The work will amount to roughly 7 days as per my assumption.