On The Beach`, a leading UK travel company, leveraged WunderGraph Cosmo to modernize its GraphQL architecture and overcome scalability challenges. Initially, they built a custom GraphQL Federation but struggled with maintenance and complexity. Adopting Cosmo enabled streamlined schema management, reduced operational complexity, and improved developer experience with advanced request tracing. Event-Driven Federated Subscriptions revolutionized real-time data handling, while Advanced Request Tracing boosted performance and profitability. The Cosmo Schema Registry centralized schema management, simplifying API development and unlocking efficiency. By offloading outdated functionality and distributing responsibilities to domain-specific teams, On The Beach improved scalability and reduced maintenance burdens. Their collaboration with WunderGraph ensured a smooth transition, providing hands-on guidance and exceptional support. Looking ahead, On The Beach plans to deepen their use of Cosmo's features to continue enhancing real-time data capabilities and exploring ways to extend the hybrid architecture for scalability and cost efficiency.