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Sajahan BiswasSB
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Sajahan Biswas

@sajahanbiswas

I improve enterprise data quality, reporting, and analytics across large datasets.

India
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At EXL, I analyze and validate large enterprise datasets using Python, PySpark, Spark SQL, SQL, and Excel. I lead Parquet-to-Delta migration analysis, validate business and composite keys, and identify anomalies that affect data accuracy and performance.

Previously at TCS and TransUnion CIBIL, I improved data quality across ingestion and target datasets, built reports, KPI scorecards, and dashboards, and translated technical findings into business-friendly insights. I used SQL, Hadoop, Python, Tableau, Excel, and Power BI to detect anomalies, resolve data issues, and support finance, leadership, and data teams.

I bring 7+ years of experience in analytics, reporting, ETL, data processing, governance, and visualization, including team leadership and mentoring.

Experience

Work history, roles, and key accomplishments

Education

Degrees, certifications, and relevant coursework

IB

International Institute of Technology Bangalore

Executive Post Graduate Program, Data Science

Executive PG Program in Data Science from International Institute of Technology Bangalore.

Anna University logoAU

Anna University

Master of Computer Applications, Computer Applications

Master of Computer Applications from Anna University, Chennai.

University of North Bengal logoUB

University of North Bengal

Bachelor of Science, Information Technology

Bachelor of Science in Information Technology from University of North Bengal, Siliguri.

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