Alex Eldeib focused on backend stability and correctness across two major repositories, red-hat-data-services/kueue and NVIDIA/TransformerEngine. In kueue, Alex addressed issues in workload patching by refactoring status update logic and fixing SSA patch generation, ensuring accurate resource reservations and reliable request propagation using Go and Kubernetes. Integration tests were added to prevent regression and maintain alignment with upstream changes. In TransformerEngine, Alex improved the JAX backend by correcting narrowing conversions in shape calculations, explicitly casting types in C++ and JAX to prevent data loss and runtime errors. The work demonstrated careful attention to reliability and long-term maintainability.