Worked on enhancing metadata reliability and observability in the apache/gravitino and OpenLineage/OpenLineage repositories. Addressed partition syncing issues between Paimon and Hive Metastore by implementing native catalog cache invalidation, ensuring accurate partition visibility after DDL operations. Introduced catalog enrichment and cache invalidation hooks to maintain cache coherence and establish Gravitino as the authoritative metadata source. In OpenLineage, added abort event emission for canceled Flink jobs, improving job lineage tracking and observability. Utilized Java, Flink, and backend development skills, with a focus on database management and unit testing, to deliver solutions that improved metadata consistency and reduced troubleshooting time.