- Architected Hive-to-Snowflake migration via Airflow DAGs and PySpark/HiveQL validation scripts, ensuring zero downstream disruption and 100% data accuracy during cutover. - Built production ETL pipelines processing 1M+ daily records at 99%+ reliability, utilizing Airflow orchestration and standardized dbt transformations on Snowflake. - Designed 50+ optimized tables/views (Medallion architecture) and stored procedures, including semantic views feeding Snowflake Cortex AI and analytics for 500+ users. - Engineered ABAC security policies via Immuta for 200+ Snowflake/Hadoop tables, integrating native workspaces and Active Directory access controls. - Automated HPII/PII governance by integrating Immuta with Collibra via REST APIs eliminating 6 months of manual effort while governing Tableau Server, Dataiku, and sandbox environment access. - Managed end-to-end CI/CD pipelines via Jenkins and TeamCity, achieving ~99% deployment success across production Snowflake and data pipeline releases with zero critical rollbacks.