Oleg Chulanovskyi completed pluralization refactors across the hackolade/DeltaLake and hackolade/SQLServer repositories, focusing on standardizing the handling of pluralized strings and item collections. Using Java and SQL, Oleg updated variable names and usage patterns to consistently reflect plural forms, which improved code readability and reduced the risk of runtime errors when processing multiple items. The refactoring work enhanced maintainability and prepared both codebases for future internationalization, all while ensuring no changes to user-facing behavior. Oleg’s approach demonstrated a strong grasp of database management and code refactoring, delivering targeted improvements with minimal risk and clear long-term benefits.