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We need an EXPERT to Fully Optimize our Server CentOS 6.4 + Magento Store to reach a top grade on the Server performance test shown in the following website: http://www.webpagetest.org/ and also http://developers.google.com/speed/pagespeed/insights/
Tasks include but are not limited to:
Varnish + Tupertine
Leverage Browser Caching
Reduce Server Response time (actually 1.4)