At MAPUP, I build and own production Dagster assets that match GPS telemetry to toll transactions, processing 5M+ transactions in 2026 and supporting billing disputes and transponder fraud detection. I also classified $1.5M in billing exceptions and built an AWS Lambda service that filed 1,500+ refund claims.
I cut monthly pipeline processing time by 92% with async Python and Athena queries over Apache Iceberg, and reduced Athena spend by tracking costs and redesigning heavy scans. Previously, at WORKEXC I built Python ingestion pipelines for 200,000+ pharmaceutical records, and at TATA CONSULTANCY SERVICES (TCS) I improved data validation that reduced client complaints by 80%.
