I read your job description and understand your requirements that you want to increase shopify site speed,so i am holding 5 year experience as shopify developer and designer.
Stay tuned, I'm still working on this proposal.
We are an it Company, We do this Every day and it will be done in 2 Hour's.
Relevant Skills and Experience
Shopify,
Proposed Milestones
$25 AUD - Speed up