Worked on the ray-project/deltacat repository to address a critical bug in block group generation, focusing on edge-case handling for min_key and max_key during data retrieval. Using Python and leveraging backend development and data storage expertise, refined the index calculations to ensure accurate block group retrieval when the minimum key matched the global minimum key. Added targeted tests to validate this scenario, reinforcing the reliability of data processing pipelines. This work improved the robustness of deltacat’s block grouping logic, reducing the risk of downstream errors and enhancing the trustworthiness of analytics workflows that depend on precise data partitioning and retrieval.