Worked on reliability and testing workflow enhancements for the goldmansachs/legend-engine and finos/legend-studio repositories, focusing on backend and UI improvements using Java, TypeScript, and React. Addressed data integrity in the Relational Store by implementing robust handling of duplicate column mappings and strengthening duplicate-definition checks with comprehensive tests. Enhanced the testing workflow in Legend Studio by introducing diff view tables for non-JSON objects and an 'Accept Changes' button, streamlining the process of updating expected test results. Improved the EqualToAssertFailViewer to preserve native types for accepted values, reducing false warnings and accelerating test maintenance for more accurate validation.