Terraforming a better engineering experience with Atlantis

Expel details redesigning its core engineering platform to enable self-service cloud infrastructure provisioning by combining Terraform, Atlantis, opinionated internal Terraform modules, and GitHub-based workflows. The post covers requirements (consumable abstractions, IaC, automation, auditability), the chosen stack and workflow (module invocation, PR-based Atlantis plan/apply comments), benefits (SRE best-practices baked into modules, distributed locking, visibility, reduced attack surface), and how telemetry is used to measure platform adoption.