Shopify Expert Needed

Hi, We are running more than 10 eCommerce website for [login to view URL] promote our products and webpage we need continues update of our site by various plugin,banner,ad,product,promotion etc. we have few store in shopify platform that need an expert programmer to manage everything for keep them up to date. We need one to be able to work in Shopify, we got some customization job for [login to view URL] example like adding a logo to specific spot without ruining the whole site, as stuff will get pushed down. So they need to be done to absolute perfection as the websites are live and has 10-50 guests at any second. Long term project,more details will be given at interview time. Thanks ATS Team