Seems they are indeed using Wordpress (based on the page source). The real site is here: https://redditupvoted.wordpress.com/ https://redditupvoted.wordpress.co

Seems they are indeed using Wordpress (based on the page source). The real site is here: https://redditupvoted.wordpress.com/ https://redditupvoted.wordpress.com/ - I think you'll find they're using existing plugins for load-balancing and caching. I don't know specifics though, so a fair bit could be custom but it seems to me 90% of this site was probably design and 10% development.