Zapier snaps each customer Zap into its own AWS Lambda, cradled inside lean Firecracker microVMs. It wrangles 100k+ functions under an EKS control plane and inventory DB. When runtimes retire, Zapier swings into action: a set of Terraform modules paired with a custom Lambda canary tool. Traffic trickles in. Rollback fires the moment things falter. Cleanup purges the old. Boom—95% fewer deprecated runtimes.
Infra shift: Canary-fueled upgrades and IaC morph serverless into a self-healing machine.
