Cloud Function

ELI5 — The Vibe Check

A cloud function is a piece of code you deploy to the cloud that runs when triggered — by an HTTP request, a file upload, a timer, or another event. You don't manage any server. Write the function, deploy it, forget about infrastructure. GCP Cloud Functions, AWS Lambda, and Azure Functions are all cloud functions.

Real Talk

Cloud functions are event-driven, serverless compute units deployed to managed runtimes. Each function handles a single trigger type and is independently deployable. Providers auto-scale from zero to thousands of concurrent executions. Suitable for webhooks, data transformation, background jobs, and API backends.

Show Me The Code

// GCP Cloud Function (gen 2)
import functions from '@google-cloud/functions-framework';

functions.http('myFunction', (req, res) => {
  const name = req.query.name || 'World';
  res.send(`Hello, ${name}!`);
});

When You'll Hear This

"Write a cloud function to send the welcome email on user signup." / "Cloud functions are billed per invocation — great for low-traffic features."