They could probably use your help - according to this article, Paraguay's university system was ranked 135th out of 137 countries studied:
Another article which is an overview of some of the problems with universities in Paraguay:
Do you speak Spanish, or GuaranÃ, or preferably both, and fluently? Without either of those, I'd say your chances of finding a job there are slim and none. With either or both, I think your chances would upgrade to "possible".
There is a chance you could find a job as a Professor of English - but not necessarily in a university setting: