Serverless does not automatically mean cheap. It means the billing model follows usage closely, which is powerful when the workload is understood and dangerous when it is not.
Cost visibility from day one
Every production resource needs ownership, environment and product tags. Budgets and anomaly alerts are part of the launch checklist, not a finance cleanup task later.
Right-size the expensive edges
The biggest costs often hide around logs, data transfer, storage growth and over-eager retries. We review those paths before optimizing the compute itself.
Keep feedback fast
Engineers should see cost impact close to the change that caused it. Monthly reports are too late; dashboards and alerts keep the loop tight.