Cloudflare uses its own platform to enhance its security and efficiency, operating as its own Customer Zero. The company faced the challenge of maintaining consistent security across hundreds of internal accounts while minimizing human errors. To tackle this, Cloudflare adopted "shift left" principles, moving security checks earlier in the software development lifecycle. This approach integrates testing and security audits into the continuous integration and continuous deployment (CI/CD) pipeline, allowing the team to catch issues before they escalate into significant problems. Key to this strategy is the use of Infrastructure as Code (IaC). All production accounts are now managed through code, ensuring every change is logged, reviewed, and tied to specific users and tickets. Cloudflare employs Terraform for its IaC, leveraging its robust open-source community and tools. With a custom CI/CD pipeline that processes around 30 merge requests daily, the company can efficiently manage configurations across numerous accounts. Security policies are defined in code using the Open Policy Agent (OPA) framework, establishing a baseline for compliance that is automatically enforced during the development process. Cloudflare maintains about 50 Rego policies that govern security requirements. These policies are checked during every merge request, with results displayed directly in GitLab comments. The system can issue warnings or outright block deployments based on policy compliance. Exceptions to these policies are documented rigorously through a formal process, ensuring that any deviations are carefully managed. This structured approach not only enhances security but also promotes accountability among teams by making them responsible for their configurations.