[Destiner]

> We use the excellent sqlx Rust package to handle migrations.

> The JSR API server is written in Rust, using the Hyper HTTP server. It communicates with the Postgres database via the sqlx Rust crate.

Looks like most of the backend is written in Rust. Must be a bummer working on a JS runtime, and not being able to test it out at such a scale.

[paxys]

The V8 engine is written in C++ not JavaScript. Building high-level languages/tooling in lower-level system languages is a very common (and sensible) practice.