Node.js
FreeJavaScript runtime for the server. Run apps, CLIs, and build tools outside the browser.
Try itPros of Node.js
Same language as front-end JavaScript
Huge package ecosystem via npm
Fits APIs, scripts, and full-stack frameworks
Cons of Node.js
CPU-heavy work needs care or workers
Version and native-module friction across machines
Not a fit if you want a different server language