Roshmita Dey

Data Science Analyst @ Citi

About

https://medium.com/@roshmitadey As a Data Science Analyst at Citi, I leverage my expertise in Python, PySpark, and Tableau to develop and deploy anomaly detection models that monitor alert volumes and enable early detection of functionality issues. I also design statistical anomaly detection frameworks for trader activity analysis and integrate insights via Tableau. Additionally, I lead the end-to-end development of interactive Tableau dashboards, reducing manual effort by 80% and improving user insights. Previously, I worked as an Analyst at Deloitte India, where I worked on several Skill Benchmarking projects within Workforce Transformation for US multinational companies using Tableau and SQL. I also worked extensively in MS Excel and ProVal for Valuation Accounting and Audits (US GAAP/IFRS) to create comprehensive reports for US Retirement Plans. I hold a Master's degree in Statistics from Lady Shri Ram College For Women and a Bachelor's degree in Statistics from University of Calcutta. I am passionate about applying data science techniques to solve real-world problems and drive business value.

Country

India

City

Pune District

Industry

Financial Services

Skill

XGBoost, Random Forest, Natural Language Processing (NLP), Big Data, Hypothesis Testing, Data Visualization, Logistic Regression, Programming Languages, Deep Learning, Agile Methodologies, Hadoop, Capital Markets, Business Statistics, PySpark, Machine Learning, Data Science, Statistical Data Analysis, Big Data Analytics, Actuarial Science, Financial Accounting

Experience

Data Science Analyst

Citi

2023-2 - Present · 3 yrs 8 mos

Pune, Maharashtra, India

Built and deployed scalable ML models for trade surveillance across global markets. Developed anomaly detection systems that automated 80% of manual alert reviews across 65+ systems in 10 countries. Implemented AutoEncoders with SHAP explainability to improve precision by 25%, and led model drift monitoring using KS & PSI. Built Random Forest and LightGBM models for alert auto closure, and applied K-Means clustering to detect collusion patterns. Partner with product, compliance, and engineering teams to deliver production-grade AI solutions.

Analyst

Deloitte

2020-9 - 2023-1 · 2 yrs 5 mos

Pune, Maharashtra, India

Delivered data analytics and actuarial solutions for U.S. clients across workforce transformation and retirement consulting. Built Tableau dashboards for hiring trend analysis, developed Python-based reward optimization models, and delivered 75+ actuarial valuations and audit reports under US GAAP and IFRS. Built a strong foundation in client-facing analytics, compliance, and business storytelling.