Undisclosed Technology Company

An undisclosed technology company was managing a complex cloud estate using AWS CloudFormation. As the team and infrastructure grew, CloudFormation's limitations in modularity and state management created friction — slowing deployments and making large-scale refactoring risky. Critical PostgreSQL databases also needed major version upgrades, but the business could not afford any downtime.

We led an enterprise-wide migration from CloudFormation to Terraform, re-expressing the entire infrastructure estate as composable, version-controlled Terraform modules. This gave the engineering team a consistent, auditable, and repeatable provisioning workflow. In parallel, we designed and executed zero-downtime PostgreSQL major version migrations using blue/green deployment strategies and replication-based cutover, ensuring no service interruption during upgrades.

• Full enterprise estate migrated from CloudFormation to Terraform with no service disruption
• Zero-downtime PostgreSQL major version migrations executed across production databases
• Improved developer velocity through reusable, modular Terraform infrastructure
• Reduced provisioning errors and improved auditability with state-managed IaC
• Platform positioned for scalable, repeatable growth