The presentation was minimal, included some code snippets and was super easy to follow. Appears that it was put together all in Markdown, using a very popular open source tool (which I was not aware of): sli.dev. Highly recommend it for folks who make technical presentations.
p.s in the same space, someone also recommended https://revealjs.com/
Commenting to find these presentation app reccs in case I’m ever employed and need to present something again