SEO inpage optimization for Magento ecommerce website

We have a ecommerce website for the indian Market, I am looking for an experienced SEO profession who can use latest tools and optimized the site for top SEO ranking. When we add other items all pages must be seo and w3c complaint. This should be a onetime exercise after which will be focusing on keywords, link building, blog , social etc. - if this activity is done well, i will be warding the offpage activity like link building, keyword, PR, social etc. that will run for a long term for years. Quality of work is very important. The bidder must have a rating of 4.5 and above. work should be completed in 10 days.