It’s Time To Kill Staging: The Case for Testing in Production

Request-level isolation enables testing directly in production environments by spinning up isolated sandboxes for individual service changes, eliminating the need for traditional staging environments. This approach routes test traffic through sandboxed services while production traffic flows normally, using isolation headers to separate test data from production databases. Companies like DoorDash and Uber have adopted this model to reduce infrastructure costs, eliminate deployment bottlenecks, and achieve higher testing fidelity by testing against real dependencies and data scales instead of production approximations.