Open to opportunities

Varun KUMAR

@varunkumar12

I build AWS data pipelines and machine-learning solutions that improve financial decision-making and operational outcomes.

United States

Message

What I'm looking for

I'm looking to build scalable cloud data platforms and machine-learning solutions where I can improve data quality, operational decisions, and measurable business outcomes.

At CitiGroup, I build machine-learning and data solutions for credit risk, fraud detection, customer support, and investment inquiries. My work includes models that reduced loan defaults by 20%, improved fraud detection accuracy by 15%, and reduced ticket resolution time by 30%.

I also built an AWS S3 data lake with MongoDB metadata and Python ETL pipelines to automate large-scale data ingestion for model training, improving predictive accuracy by 20%.

Previously at Tredence and Fractal Analytic, I developed AWS data warehouses, scalable ETL pipelines, real-time Apache Flink and Kafka workflows, forecasting and recommendation models, and Power BI reporting. I focus on turning structured and unstructured data into reliable datasets, analytics, and machine-learning applications that improve efficiency, revenue, and data quality.

Experience

Work history, roles, and key accomplishments

Current

Data Engineer

Current

CitiGroup

Jan 2024 - Present (2 years 8 months)

Built and deployed machine learning models for credit risk assessment, anomaly detection, and document classification, achieving significant improvements in fraud detection and operational efficiency. Developed ETL pipelines and data lakes on AWS to support model training and analytics.