Site Optimization (Performance + SEO)

I need to optimize my site for both performance and SEO. For performance, developer must achieve grade A in Yahoo Yslow test and 95-100% in Google Page Speed test. For SEO, developer must achieve top 5 Google ranking, following Google best practice guidelines. This is a MUST. Domain and further info will be provided by PM to qualified bidders. Payment: Full milestone payment will be made upon project award, paid as follows: - 50% paid upon achieving grade A and 95-100% in performance. - 50% upon achieving top 5 ranking. PLEASE READ THIS CAREFULLY. If you require any advanced payment, do not bid. I'm paying for a service, and service is only paid when it is done.