George Papanikolaou focused on backend reliability in the panther_analysis_tool repository, addressing a critical bug that affected schema resolution. He implemented a case-insensitive schema name lookup in Python by applying the casefold() method within the Uploader.get_schema_by_name function, ensuring that schema retrievals no longer failed due to input casing discrepancies. To validate this change, George expanded unit testing coverage, adding regression tests to confirm consistent behavior across ingestion paths. Although he did not introduce new user-facing features during this period, his work improved data integrity and maintainability, demonstrating depth in backend development and a strong emphasis on robust unit testing practices.