Worked on the apache/pinot repository to address a critical issue in real-time multi-stream data ingestion pipelines. Focused on backend development using Java, the developer corrected the handling of stream partition IDs within the PartitionGroupConsumptionStatus component. This fix ensured that data from multiple streams was routed accurately, preventing partition mismatches and reducing discrepancies in live analytics results. The solution involved targeted validation to maintain correctness and reliability in the ingestion logic, directly improving data consistency for downstream consumers. By enhancing the stability of real-time data processing, the work contributed to more trustworthy analytics and robust streaming pipelines within the Pinot ecosystem.