Open to opportunities

Abhay Lohia

@abhaylohia

Message

I build production ML models that drive measurable retail and fintech growth.

India

Message

At Citibank, I built and containerised an XGBoost engagement model for 6M customers, driving USD 84M in incremental sales, and developed a temporally stable SAS logistic regression model sustaining USD 9M in quarterly revenue. I translate model drivers into decisions through SHAP explainability and Tableau dashboards.

Previously at Paisabazaar.com and Cashkaro.com, I delivered a 240% collections increase, 37% monthly credit-risk reduction, 2.3× loan disbursal growth, 50% marketing-cost reduction, and a 16% revenue uplift through propensity modelling, risk modelling, experimentation, and analytics.

Experience

Work history, roles, and key accomplishments

Current

Data Scientist

Current

Citibank

Sep 2024 - Present (1 year 11 months)

Developed and containerised a multi-label XGBoost classifier for batch scoring, predicting customer engagement across spend categories for a 6M-customer base, driving USD 84M in incremental sales. Ran champion/challenger testing and built a SAS logistic regression model at gradient-boosting parity with stronger temporal stability.

XGBoost Docker SAS Logistic Regression SHAP Tableau Model Validation Feature Engineering Hypothesis Testing

Data Scientist

Paisabazaar.com

Sep 2023 - Sep 2024 (1 year)

Architected a collections propensity model (XGBoost) predicting debt repayment probability, scaling recovered collections 240% organisation-wide. Devised a Probability of Default credit risk model using CatBoost with Bayesian optimization, achieving a 37% monthly credit risk reduction.

XGBoost CatBoost Bayesian Optimization PySpark AWS RedShift Hive Random Forest Hypothesis Testing Feature Engineering Model Validation

Data Analyst

Cashkaro.com

Jan 2023 - Jun 2023 (5 months)

Designed and analyzed A/B tests on landing pages and user journeys, resulting in 16% revenue uplift. Developed Power BI dashboards surfacing real-time KPIs, cutting reporting turnaround 60%.

A B Testing Power BI Data Visualization KPI Design Segmentation Multivariate Testing

Business Analyst Intern

Cashkaro.com

Jun 2022 - Sep 2022 (3 months)

Developed custom Python scripts to automate ETL processes and analysis, reducing manual efforts and errors while ensuring timely delivery of accurate reports.

Python ETL Automation Data Analysis

Machine Learning Intern

Microsoft

Dec 2019 - Jan 2020 (1 month)

Applied Scikit-learn, Pandas, and Matplotlib to build and visualise ML models, contributing to exploratory data analysis pipelines under senior mentorship.

scikit learn Pandas Matplotlib EDA Machine Learning