Selena Chen refactored replication validation logic in the linkedin/openhouse repository, introducing a dedicated ReplicationConfigValidator to handle replication interval and destination checks. By moving these responsibilities out of the existing Policies validator, she reduced code coupling and simplified Spring dependency injection for replication features on the LI side. This modular approach in Java established a clearer separation of concerns, improving maintainability and testability of replication configuration handling. Selena’s work laid the foundation for future validation enhancements, with changes tracked in Git for transparency and review. The refactor focused on backend development, leveraging Java, Spring DI, and modular validator design principles.