Alex Eldeib focused on backend stability and correctness across two major repositories, red-hat-data-services/kueue and NVIDIA/TransformerEngine. In kueue, Alex refactored workload patching logic in Go and Kubernetes, resolving issues with SSA patch generation and status propagation that previously led to unreliable resource reservations. Integration tests were added to ensure ongoing reliability and alignment with upstream changes. In TransformerEngine, Alex addressed data loss risks in the JAX backend by fixing narrowing conversions in C++ and CUDA shape calculations, improving the accuracy of activation and normalization paths. The work demonstrated careful attention to subtle bugs and robust validation of backend systems.