Ilya Barakaiev contributed to backend reliability and data integrity across two repositories, ash-project/ash and TanStack/db, over a two-month period. In ash-project/ash, he expanded update action flexibility by implementing Elixir-based tests that validated argument expressions without explicit accept lists, improving update operation reliability and traceability. For TanStack/db, he addressed critical syncing bugs in the Electric adapter and collection layer using TypeScript, resolving issues like DuplicateKeySyncError and orphan transactions during high-concurrency sync scenarios. His work focused on robust testing, transactional consistency, and regression safety, demonstrating depth in backend development and a disciplined approach to maintaining data integrity and operational stability.