Vasu Mariappan
@vasumariappan
Data engineer building BigQuery ETL pipelines and financial reporting systems for PayPal.
IndiaWhat I'm looking for
I build and maintain BigQuery SQL scripts for large-scale financial data processing for PayPal, translating reporting needs into star schema and fact-dimension designs.
I run end-to-end ETL workflows that migrate data from on-prem relational databases and flat-file sources into Google BigQuery, using SCD Type 1 and Type 2 patterns to preserve dimensional history.
I also automate validation frameworks and monthly reporting by reconciling row counts, checking nulls, and exporting structured Excel/CSV outputs—cutting manual reporting effort by 50%.
Experience
Work history, roles, and key accomplishments
Developed and maintained BigQuery SQL scripts for large-scale financial data processing, supporting PayPal's transaction reporting pipelines. Executed end-to-end ETL workflows migrating data into Google BigQuery.
Education
Degrees, certifications, and relevant coursework
Chennai Institute of Technology
Bachelor of Engineering, Computer Science
2016 - 2020
Grade: 8.0 / 10.0
Bachelor of Engineering in Computer Science from Chennai Institute of Technology from 2016 to 2020 with a grade of 8.0/10.0.
Tech stack
Software and tools used professionally
Availability
Location
IndiaAuthorized to work in
Job categories
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