Not OP, but looks like it's built on Jekyll. If you're not familiar, it's a Static Site Generator. It generates static html files from your content (generally markdown files).

There are other SSGs, I use Hugo myself (http://gohugo.io, sample of my blog: http://arianv.com/). I like Hugo cause it's probably the fastest SSG (every time you create a post/change content, you're remaking your entire site from scratch. If you have lots of posts - this adds up!) but Jekyll is the most popular and has great tooling.

Hope that helps!