The site has since undergone another redesign since this post was written. You might note the uses page.
The new version of jshwlkr.info is finally live after almost a year
This website is built with 11ty, a wonderfully simpler and purely JavaScript-based static site generator. Specifically jshwlkr.info is using a modified version of Mike Riethmuller's Supermaya. 11ty allows for a long list of template languages, in this case mostly Markdown and Nunjucks (which is surprisingly powerful), but does not explicitly have any other form of content pipeline. However, Supermaya has a very nice SASS/SCSS/etc pipeline via Webpack which is something I sorely missed trying to work in vanilla 11ty. Sourcehut is currently playing host (and build mechanism) to this site's source. Editing is done in (the current hotness, the ubiquitous) Visual Studio Code.