Led the data migration from legacy systems to a Teradata-based data warehouse for Citi Bank's retail banking operations across EMEA, achieving 99% data integrity. Also designed and implemented BTEQ scripts for multinational clients, improving data processing efficiency by 20%.

Big Data Engineer at Tata Consultancy Services

January 1, 2024 - January 1, 2024

Led the design and implementation of Hadoop-based big data processing, enabling scalable analytics of large data sets and improving data retrieval efficiency by 25%. Integrated Azure-based data sources with enterprise BI tools, enabling centralized dashboards and pipelines using Azure Data Factory, and built Power BI and Tableau dashboards; generated SAP BO reports to track KPIs, contributing to a 10% increase in operational efficiency.

Data Analytics & BI Engineer at Tata Consultancy Services

November 1, 2019 - November 1, 2019

Established incident tracking frameworks and reduced issue resolution time by 25% through proactive root cause analysis. Collaborated with cross-functional teams to define system requirements, delivering 10+ projects on time and within budget, improving system reliability by 20%. Automated job scheduling using AutoSys, improving operational efficiency for data processing tasks by 15%. Developed SQL queries for data extraction and validation across Teradata and Oracle environments.