Keshav Tiwari

I'm currently validating real-time e-commerce pricing and inventory pipelines at Datasembly, processing 5+ billion product records daily for 200+ Fortune 500 retail clients. I caught pricing data corruption across 50,000 SKUs before production, preventing $2M+ in revenue leakage.

I build Python validation frameworks with Pandas, Great Expectations, and custom libraries, and use PySpark on Databricks to validate distributed billion-record datasets. My automation reduced manual QA effort by 50%, while Tableau observability dashboards and Airflow quality gates improved reliability and reduced incident resolution time.

At LTIMindtree, I led QA for a $500M+ insurance warehouse migration from Oracle and Teradata to Snowflake, validating 2.5B+ records with zero data loss. I created 300+ SQL validation queries, reduced regression testing from five days to two, and identified premium-tax issues that helped prevent $3M+ in regulatory penalties.

Earlier at T-Systems, I validated telecom billing and rating pipelines handling 200M+ daily transactions for 50M+ subscribers. I was recognized as a Star Performer for quality delivery and maintaining 100% uptime during a critical EPC migration.