Behind the scenes of Vercel's infrastructure: Achieving optimal scalability and performance

This post details Vercel's infrastructure for building and deploying serverless applications, focusing on the "build" and "request" phases. It explains the process of uploading project files, creating deployments via the CLI or Git integration, and the role of builders in transforming code into Vercel deployments. It highlights the provisioning of Vercel Functions, Edge Functions, and optimized images. The request phase is described as utilizing anycast routing to the nearest edge location, which then routes requests through a Kubernetes cluster and reverse proxy to determine the correct deployment and resource to serve, including handling static resources, Vercel Functions, and Edge Functions.