Y. Tanaka focused on backend reliability improvements for the apache/answer repository, addressing a critical OAuth login issue. By expanding the avatar URL field in the database schema from 1024 to 2048 characters, Tanaka ensured that long URLs from external OAuth providers no longer caused login failures. This work involved updating the Go-based backend and managing a safe database migration, including versioning and documentation to align with deployment and rollback processes. Leveraging skills in Go programming, backend development, and database management, Tanaka’s targeted fix enhanced user onboarding, reduced support incidents, and strengthened data integrity, demonstrating careful attention to migration safety.