Case study

Multi-Account Infrastructure as Code

One infrastructure codebase for 50+ AWS accounts — provisioning, networking, and governance shipped as reviewed, repeatable code.

Problem

Hand-managed infrastructure diverges: every account ends up configured slightly differently, changes carry risk, and migrations depend on whoever remembers how an environment was built. Past a handful of accounts and domains, that approach stops scaling.

Approach

• Reusable, versioned Terraform and Terragrunt modules serve as the building blocks for every account and environment, replacing manual configuration with modular infrastructure-as-code.
• 20+ domains were migrated onto the platform, standardizing multi-environment deployments along the way.
• Automated GitHub Actions and GitLab CI pipelines validate and apply changes, enforcing standardized governance and eliminating infrastructure drift.
• Networking and security ship inside the modules — optimized CIDR allocation, public/private subnet isolation, VPC peering, granular Security Groups and NACLs, and least-privilege IAM policies.

Outcome

• 50+ AWS accounts and 20+ migrated domains running on consistent, drift-free infrastructure code.
• Infrastructure changes became reviewed, repeatable code instead of manual operations.
• Reduced network exposure through cross-account least privilege by default.

Stack