NodeJS

JavaScript runtime built on the V8 engine that lets you run JavaScript outside the browser. It enables server-side development with an event-driven, non-blocking I/O model suited for scalable network applications, from HTTP APIs and real-time services to command-line tools and automation scripts. Node.js brings the same language and ecosystem to both frontend and backend, reducing context switching for full-stack teams.

Node.js powers applications at Netflix, LinkedIn, PayPal, and many Fortune 500 companies. Supported by the OpenJS Foundation with contributors from Microsoft, IBM, and Red Hat. It stands out from Python or PHP runtimes by using a single-threaded event loop with worker threads for CPU-heavy tasks, plus a massive npm registry with hundreds of thousands of packages. Cross-platform support spans Windows, macOS, and Linux with LTS releases for production stability.

Key capabilities:

• Built-in HTTP server and networking APIs for TCP, UDP, and TLS
• Streams and buffers for efficient file I/O and data piping
• Worker threads and child processes for parallelism and offloading
• Native ES modules and CommonJS for flexible module loading
• npm integration with the largest open-source package registry

Use cases include REST and GraphQL APIs, real-time dashboards and WebSocket servers, microservices and serverless functions. Developers rely on Node.js for build tools, dev servers, and CLI applications such as ESLint, Vite, and Prisma. Full-stack teams reuse TypeScript, testing frameworks, and deployment pipelines across frontend and backend.