During their work on the Shopify/grpc repository, Abau focused on improving Bazel build reliability for Windows environments. They addressed a dependency selection issue by introducing a windows_os config_setting, ensuring that Windows-specific dependencies are correctly chosen when the os:windows constraint is set. Their changes also updated the default_event_engine_factory to use the appropriate windows_event_engine dependency, aligning build behavior with OS requirements. By resolving misbundling of OS and CPU in older configurations, Abau enhanced build determinism and cross-platform reproducibility. Their work, using Bazel and BUILD language, contributed to more stable Windows CI pipelines and faster, more reliable feedback cycles.