Worked on the apache/hudi repository to enhance the reliability of commit timeline calculations in Java-based backend systems. Addressed a bug by refactoring the API to ensure that only completed instants are considered in timeline computations, thereby preventing inaccuracies from INFLIGHT or incomplete data. This involved introducing a filter to exclude unfinished instants and expanding test coverage to validate the new logic, including scenarios with INFLIGHT data. The changes improved the stability and trustworthiness of commit histories, supporting more accurate reporting and analytics for downstream stakeholders. Demonstrated skills in Java development, backend engineering, and API refactoring throughout the process.