Worked on the sodadata/soda-core repository to deliver three features and a bug fix over three months, focusing on data quality and extensibility. Developed null-aware validation metrics by enhancing SQL generation logic in Python and SQL, allowing accurate inclusion of NULL values in data quality dashboards. Improved Jinja templating by enabling flexible variable substitution, supporting special characters in SQL queries. Extended the SodaCL parser using ANTLR to allow numeric-prefixed identifiers, updating grammar and interpreter configurations. Addressed a Dask integration issue by correcting row count query generation with duplicate checks, reinforcing metric argument handling and adding targeted tests to ensure reliability.