Cheshta Sharma

About Cheshta Sharma

Motivated and detail-oriented Data Analyst with a deep understanding of fraud metrics and…

Experience

1. Fraud Analyst

   Citi India

   Jun 2023 — Present · Bengaluru, IN

   1.) Developed data-driven fraud detection strategies for the Mexico credit card business, leveraging exploratory data analysis and machine learning models (Decision Trees) to enhance real-time fraud detection across both 3D secure and non-3D secure transactions.2.) Conducted trend analysis on historical data to identify emerging fraud patterns, engineering 300+ new quantifiable features across 10+ variable families, resulting in 2X efficiency gains.3.) Optimised fraud coverage across all transaction segments, refining score values to better capture high-dollar frauds while reducing impact rates and increasing fraud savings.4.) Assisted in developing an interactive Excel dashboard to track rule performance, integrating 8 key performance metrics to improve decision-making for fraud rule optimization.5.) Maintained Monthly Credit Dashboard Reports with all KPIs, shared with SLT every month for business review.