Oleksandr Rudyy focused on improving CI reliability and test traceability for the DataDog/dd-trace-java repository during June 2025. He addressed a critical issue in the CI workflow by updating the junit_upload process to use the correct GitHub repository URL tag, ensuring that test results are accurately attributed and enabling repository-scoped test optimization features. Working primarily with Shell scripting and leveraging CI/CD and DevOps practices, Oleksandr’s targeted fix reduced ambiguity in test provenance and enhanced the reproducibility of test results. This work contributed to more reliable analytics and diagnosis, supporting faster feedback cycles and improved test optimization workflows for the project.