ETL Tester
Posted Updated
Summary
An onsite ETL Tester role in Schiller Park, IL, focused on validating large data migrations: the tester owns test strategy, proves rebuilt pipelines match legacy output via reconciliation/equivalence testing, and writes expert-level SQL plus Python automation with Databricks/PySpark for validation at scale.
Job Description · Experience in data / ETL testing, including strategy ownership on at least one large migration or re-platforming programme \n · Proven reconciliation and equivalence testing — demonstrating that a rebuilt pipeline produces output equivalent to a legacy one, and defending that conclusion to stakeholders \n · Expert SQL — complex analytical validation queries written independently against unfamiliar schemas Databricks / PySpark for validation at data volume Python for test autom…