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 and refactored the HandleCatchupSend function, reordering operations to ensure all backup commands were transmitted before the process stopped. This Go-based solution improved backup reliability by eliminating scenarios where backups could terminate prematurely, directly benefiting database management workflows. Andrey demonstrated strong concurrency debugging skills, updating both tests and documentation to reflect the safer sequencing. His work reflects a deep understanding of backend development and concurrency control, contributing to more robust and reliable backup operations for users.