Hi HN,
This is a project I've been working on for a while now. It's a hobby horse to try new technologies, but I've really enjoyed working on it.
I'm a fan of the GamesDoneQuick (gamesdonequick.com) speedrun marathon that pops up to the top of Twitch twice a year. Inspired by previous sites that have done visualizations like this, I decided to take a crack at realtime stats last year.
This is the current iteration of GDQStatus, which is powered by React + Recharts and AWS Lambda.
The site itself is static - which is hosted in Github pages, and data is fetched from S3 (as a caching layer) with hot data served by a Lambda.
Let me know if you have any questions!