Google Cloud Functions

Google Cloud Functions (GCF) is a fully managed, event-driven Function-as-a-Service (FaaS) platform: Execute single-purpose code without managing servers.

GCF, now built on Cloud Run, provides a serverless execution environment for your event-driven applications. You write code in supported runtimes (Node.js, Python, Go, Java, etc.); Google Cloud handles all infrastructure: provisioning, scaling, and maintenance. Functions are triggered by HTTP requests or events from 90+ Google Cloud sources (Cloud Storage, Pub/Sub, Firestore). The platform automatically scales from zero to planet-scale, and the pay-as-you-go model ensures you only pay for compute time, metered to the nearest 100 milliseconds.

https://cloud.google.com/run/functions