During November 2024, Alex Bau focused on improving build reliability for the Shopify/grpc repository by addressing a Bazel dependency selection issue specific to Windows environments. Alex introduced a windows_os config_setting in BUILD files, ensuring that Bazel correctly identifies and applies Windows-specific dependencies. By aligning the default_event_engine_factory with the Windows event engine and resolving legacy misbundling of OS and CPU constraints, Alex enhanced build determinism and cross-platform reproducibility. Leveraging expertise in Bazel and build systems, Alex’s targeted bug fix reduced Windows CI instability, resulting in more reliable production readiness and faster feedback cycles for the team’s development workflow.