Hello,
Although I don't have any experience working with clients through freelancer.com, I've been doing work in web, print, and marketing for nearly three years now. You can check out my website for all that at www.georgemokhiber.com. Squarespace was one of the first CMS platforms I became familiar with, so I really know my way around it. Squarespace requires minimal HTML and CSS, but I'm experienced with HTML, CSS, and Java should any of that be necessary for what you need. I'm also happy to revise and discuss things with you all (whether over email, phone, or Skype) until you get a final product you love.
I'm really excited to do some good work, and would be thrilled to be your freelancer for this project. If you have any questions, don't hesitate to ask!
Thanks,
George Mokhiber