S Thejaswi

Data Analyst

Tata Consultancy Services

Jul 2024 - Aug 2026

Analyzed large datasets using SQL to extract, validate, and transform business data into meaningful insights for reporting and decision-making. Processed and transformed large-scale datasets using PySpark on Hadoop (Hive), supporting data pipelines and data models that fed downstream reporting and dashboards. Developed and optimized complex SQL queries, stored procedures, views, and CTEs to improve reporting performance and ensure accurate data retrieval. Built interactive Tableau and Power BI dashboards and KPI reports, enabling stakeholders to track KPI performance, monitor business outcomes, and identify trends. Performed root cause analysis (RCA) on data gaps and quality issues, applying data cleaning, reconciliation, and validation to keep dashboards accurate and consistent across multiple data sources. Collaborated with business analysts and cross-functional teams to gather reporting requirements, translate business needs into analytical solutions, and present insights on KPI performance to diverse stakeholders. Identified opportunities for query optimization and process automation, reducing report generation time and improving operational efficiency.