During April 2025, Andrey Borodin focused on backend stability for the wal-g/wal-g repository, addressing a critical race condition in the backup workflow. He analyzed the Backup Command Transmission path and refactored the HandleCatchupSend function, ensuring backup commands were reliably transmitted before the process terminated. This concurrency fix, implemented in Go and involving database management concepts, eliminated scenarios where backups could end prematurely, thereby improving reliability for users. Andrey updated related tests and documentation to reflect the new sequencing logic. His work demonstrated careful debugging and a deep understanding of safe operation ordering in concurrent Go-based backend systems.