Alex Vru worked on the ydb-platform/nbs repository, delivering a targeted reliability and consistency improvement to the DS proxy stack. He introduced uniform deadline handling across all DS proxy requests by refactoring the request processing logic, centralizing deadline management to ensure more predictable and reliable blob storage operations. Using C++ and leveraging his expertise in backend development and distributed systems, Alex encapsulated deadline logic to clarify the request lifecycle and reduce maintenance complexity. The work focused on feature delivery and code quality, resulting in a more maintainable system design without major bug fixes, demonstrating depth in backend engineering and system architecture.