K Health adopted GraphQL Federation with Cosmo to scale securely while maintaining API stability. They used schema checks to catch breaking changes early and hosted the router internally to ensure security and control. This has led to improved query resolution, reduced unnecessary round trips, and enhanced collaboration across teams. With Cosmo's schema checks, K Health can now identify issues such as null pointer exceptions, missing fields, and corrupted data more efficiently, reducing runtime errors. The company also benefits from enhanced security through Config Validation and Signing, which ensures only validated configurations are applied. Additionally, the unified API surface has improved communication among teams, and tracking upgrades and breaking changes is easier due to the pipeline failures that occur immediately when an update breaks something. K Health continues to expand its infrastructure with GraphQL Federation as a crucial component of their architecture, and they're now hiring for Golang developers, DevOps engineers, and solution architects who want to help shape the future of microservices, distributed systems, and APIs.