Alex Casy worked on backend development and database migration for the novuhq/novu repository, focusing on improving data integrity during subscriber migrations. During this period, Alex addressed a bug that caused duplicated subscribers by ensuring the removeDuplicatedSubscribers function was directly invoked at the end of the migration process. This targeted fix, implemented in TypeScript, reduced the risk of data inconsistency and improved the reliability of subscriber data for downstream campaigns. The change was minimal and well-scoped, with a clear rollback path, reflecting a careful approach to production stability. Alex’s work demonstrated depth in backend problem-solving and migration script reliability.