Worked on backend stability for the zitadel/zitadel repository, focusing on improving the data mirroring pipeline’s reliability. Addressed a critical bug where mirroring queries failed on tables lacking an instance_id column by implementing logic to conditionally exclude the instance_id clause. This change eliminated runtime errors and ensured consistent data replication across all tables, regardless of schema differences. The solution was developed using Go and leveraged strong backend development and database management skills. By resolving this compatibility issue, the work enhanced the robustness of the mirroring process, supporting seamless operation and reducing maintenance overhead for future database schema variations.