Disqus is! <a href="http://grnh.se/vj71bo" >
Small problems become very interesting problems when you have the kind of scale we do. (details on scale: <a href="http://blog.disqus.com/post/62187806135/scaling-django-to-8-billion-page-views" >)
Django/Python, Js, iOS, Designers. We are hiring them all!
Ask HN: Who is hiring? (June 2014)