Series A companies, having secured substantial funding, face the challenge of scaling their engineering operations while maintaining the agility that spurred their initial growth. As these companies expand their engineering teams and product capabilities, they must develop sophisticated software delivery practices that balance speed with reliability and repeatability. Key challenges include managing growing teams, increasing system complexity, maintaining quality, and scaling infrastructure. Effective continuous integration and delivery practices, supported by robust delivery metrics, are crucial for sustaining velocity and ensuring quality. Metrics such as team velocity, build and test coverage, deployment frequency, infrastructure efficiency, and developer experience are vital to identify and address scaling challenges before they hinder progress. CircleCI offers advanced CI/CD tools to help Series A companies maintain their momentum, providing analytics, automation, and integration capabilities that facilitate scalable and efficient software delivery.