Earlier quoted context omitted.
I am curious to know about the infra / tech stack, if you're comfortable with sharing any information.
He's (possibly) overselling his accomplishment here a little bit. You can achieve what he's describing using a combination of Plex, Sonarr, Jackett, and a private torrent site. You also need a torrent client that can work with Sonarr (Synology's torrent client works great in "watch this directory" mode). It's a truly self-running system. Other than the upgrades, you're able to select whatever shows you want to follow…
Would take about 30 minutes to actually get everything up if you have most of an idea of what to do and a sloppily written guide.