Worked on the tuva-health/tuva repository to enhance data quality in patient eligibility workflows by addressing a critical issue in eligibility validation. Focused on improving the reliability of the death_flag field, the developer implemented a robust SQL-based fix that safely casts the death_flag to a string before comparison, effectively handling data type inconsistencies that previously led to validation failures. This targeted bug fix reduced the risk of downstream misclassifications and improved the accuracy of eligibility decisions. Leveraging skills in SQL development and data quality assurance, the work contributed to more trustworthy data-driven outcomes within the eligibility validation process.