harivendan vijayakumar

I’m a highly skilled and detail-oriented ETL Tester with around 5 years of experience in ETL, Data Warehouse, and BI Report Testing, primarily in the Banking and Investment Banking domains. I specialize in validating complex data flows, ensuring data accuracy, consistency, and integrity across multiple systems.

Proficient in SQL, PL/SQL, Python (Pandas), Informatica PowerCenter, SSIS, Snowflake, Power BI, Oracle, SQL Server, and Unix, I have strong experience in data validation, transformation testing, and BI report verification. I also focus on automation using Python to improve testing efficiency and accuracy.

I have hands-on expertise in working with Agile and Waterfall methodologies, preparing test plans, executing test cases, and collaborating with cross-functional teams to ensure timely and quality project delivery.

Currently, I’m looking for a challenging opportunity where I can leverage my ETL testing expertise, contribute to end-to-end data quality assurance, and grow further in cloud data platforms and data engineering domains.

 Around 5 years of professional experience in ETL Testing, Data Warehouse Testing, and BI Report Validation across Banking and Investment Banking domains.
 Strong expertise in data validation, transformation testing, reconciliation, and automation to ensure data accuracy and consistency across heterogeneous systems.
 Hands-on experience with SQL, PL/SQL, Python (Pandas), Informatica PowerCenter, SSIS, Snowflake, Power BI, Oracle, SQL Server, and Unix.
 Proficient in preparing test plans, test cases, and defect tracking using JIRA, following both Agile and Waterfall methodologies.
 Validated Power BI dashboards and reports, ensuring functionality for RLS, drill-down, drill-through, filters, and bookmarks.
 Experienced in automating regression test cases using Python and PL/SQL procedures, improving testing efficiency and reducing manual effort.
 Skilled in analyzing source-to-target mappings, performing end-to-end data quality checks, and documenting test results for transparency and accuracy.
 Proven ability to collaborate with cross-functional teams — including developers, business analysts, and stakeholders — to deliver reliable, business-ready data solutions.
 Currently enhancing expertise in cloud data ecosystems and data engineering to contribute more effectively to modern data-driven projects

Bachelor of Science (B.Sc.) in Mathematics — Sri Vidya Mandir College, Periyar University, Salem, Tamil Nadu (2014)

Strong analytical and logical foundation developed through mathematics, supporting data validation and problem-solving in ETL testing.

Continuously enhancing technical expertise through self-learning in SQL, Python, Snowflake, and Data Engineering concepts to stay aligned with modern data technologies