Looking for a Magento expert to fix some issues

I am looking for a Magento expert to fix a couple of issues on my site [login to view URL] 1) The site is running slow, especially when clicking "add to cart", need you to find a way to speed up the website, clean the database or any other issues that cause the site to run slow. 2) When checking out from the shopping cart page the site goes to https/SSL and gives an error that some elements on the page are not secure "(only secure content is displayed error" error on IE11) need to find out what element on the page is not secure (image, css, etc) and fix it. Prove to me that you can handle these fixed and I will give you more constant work on other Mageno and Wordpress websites that I have. Thank you.