Over a two-month period, this developer focused on infrastructure reliability and error handling across Bazel and EngFlow/example repositories. In Bazel, they enhanced JNI error diagnostics in C++ by embedding filename and line number macros, and corrected exception handling in unix_jni.cc to ensure accurate reporting. Their work improved debugging context and error traceability. Shifting to EngFlow/example, they stabilized the CI/CD pipeline by updating CI job configurations and aligning macOS runners with a new CI fleet, using YAML and DevOps practices. These efforts reduced build failures and maintained fast feedback cycles, demonstrating a methodical approach to backend tooling and infrastructure maintenance.