On what technological platform is the Node.js runtime environment developed?

Node.js is built on the V8 technology platform — a high-performance JavaScript engine developed by Google for the Chrome browser. V8 compiles JavaScript into machine code, ensuring fast application performance.

Node.js uses V8 to execute JavaScript outside the browser and also adds its own modules for working with the file system, network, and other system resources, enabling the creation of server-side applications in JavaScript.