CMS - Drupal - SEO Functions - Multiple Sites

As an online retailer we are looking for a CMS systems able to run multiple ecommerce sites, upto 30 individual sites. Looking for someone immediately, and to hopefully have the project completed within 10 -12 days! This is a fixed rate project - Skills, ability to meet deadlines, current experience are taken into consideration. An exceptional CMS is our number 1 objective. We encourage highly skilled applicants to apply. We have the layouts of site/s, that need the CMS coding, the system should be scaleable. 1. Drupal CMS Experience - Multiple Sites 2. Understanding of DC using DCMI Metadata Terms 3. Varnish knowledge 4. Ensuring fast sites – GZIP, Minimize HTTP request, Content Delivery Network 5. XHTML pulling content into CMS 6. "alternate" Titles + Descriptions 7. "generator" Keywords and Locations, up to 20 locations 8. Multiple web pages, including sub domaining 9. Must be able to be used for social media sites/blogs 10. E-Commerce Previous experience in delivering such projects is an advantage - we are happy to pay on stage progress payments.