Not the author (Ruud), but I've been in touch with him.

The source code for his website is free software [0], so feel free to have a look or adopt it for yourself.

Ruud uses a small static site generator he's written in Haskell, and in his own words it “includes a tiny templating engine, an html and css minifier, and an aggressive font subsetter.”

[0]: https://github.com/ruuda/blog

That's exactly what I thought! One of best designed blogs I've ever seen. It has exactly what you need and nothing more. Looking at the HTML code its also incredibly simple and elegant! What a pleasure to read

Came here to say exactly this. It's rare for me to be so motivated by design to comment on it - I wanted to read more posts just because it was so beautiful to look at!

Arguably missing a link the homepage/post overview at the top, perhaps I just expect this too much from convention.

Thank you!