Worked on the opensearch-project/sql repository to address a critical issue in JSON_EXTRACT null handling, ensuring that missing paths or explicit JSON nulls now return actual null values rather than the string 'null.' This change improved data accuracy and reduced ambiguity for downstream analytics. The approach involved enhancing backend logic in Java, expanding integration and unit test coverage, and implementing YAML-based REST tests to validate end-to-end behavior. Attention was given to multi-path extraction scenarios and code formatting for maintainability. The work demonstrated strong skills in JSON handling, backend development, and comprehensive testing, contributing to the reliability of the SQL layer.