Hello, I've read your project description and I understand that you're looking for someone to speed up Magento website. For this project, I'd start with optimizing static assets, HTML structure, then the server configurations.
My name is Duc Nguyen, and I'm a Web Developer with more than 5 years experience working with PHP, MySQL, Twitter Bootstrap, etc. Also, I'm a fulltime freelancer so I can start the job right away, and right now I'm having 100% completion rate because I'm committed 100% to a single project at a time.
Hope to hear from you soon.
Best regards.