Ask HN: How would you implement Clubhouse in 2021?

Dear fellow engineers, with all abundance of software and tech stacks these days — how would you design an app like Clubhouse?

Which existing libraries, software, open or proprietary would you use for encoding/mixing/streaming?

Which parts you would write from scratch and why?

How would you design backend architecture in MVP stage and how would you change it with scalability in mind?

Related topic: https://news.ycombinator.com/item?id=26131123