JavaScript and TypeScript

This hub collects our engineering team’s notes on running JavaScript and TypeScript in production, from framework selection to the Node.js internals that decide whether an application stays fast under load. The focus is practical: the kind of detail you need when a service is slow, a build is flaky, or a hiring manager needs to know what a strong Node candidate actually looks like. We cover where JavaScript fits across the stack, including a look at what JavaScript is used for beyond the browser and a rundown of the large-scale products built on it.

Several articles go deep on the runtime itself. If you are debugging a production issue, our guide to tracking down Node.js bugs walks through the tools and techniques that actually save time, and it pairs well with our piece on managing switching Node versions safely across environments. Alongside these, we write about asynchronous patterns, WebSocket implementations, caching with Redis, and the npm packages worth knowing before you reach for a dependency blindly.

Where a project needs more hands than an internal team can spare, we work as an outside JavaScript development company, embedding engineers directly into existing codebases rather than starting from scratch. Teams also come to us for JavaScript development services when a Node.js backend needs performance work or a migration handled without disrupting a release schedule. If your stack sits outside JavaScript, the Backend Languages and Python hubs cover adjacent territory, and our Language Comparisons and Trends section is useful when you are deciding what to use next. For JVM-based systems, see Java and JVM.