Hello.
I have a good knowledge with Django and system administration (unix-like) I am graduated in BS computer science and I meet all your requeriments. I am used to git (also with others SCM like mercurial and svn), memcached (used for plenty projects already), Django (working with this excellent framework for over than 2 years) and South (I am not 100% expert on this, but already used a few times).
Unfortunately I am quite new in Freelancer, but I am willing to make a trial with you.
Thank you for your time, I hope we can make a deal.