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ETL Tester
Cosmic-I LLC DBA Northern BasePlano, TX🇺🇸United StatesPosted 10 Aug 2026
Quick Overview
Work Type
Hybrid
Level
Mid Senior
Job Description
Summary
We are looking for a Data ETL Testing Engineer with hands-on experience in ETL testing, Python, AWS, and SQL.
Responsibilities
- Perform ETL, data warehouse, and source-to-target validation testing.
- Write complex SQL queries for data validation and reconciliation.
- Automate data testing and validation scripts using Python.
- Validate AWS-based data pipelines, storage, and transformation workflows.
- Identify, log, and track defects with development and data engineering teams.
- Ensure data accuracy, completeness, consistency, and integrity.
Required Skills
- Strong experience in ETL/Data Testing.
- Proficiency in SQL and Python.
- Working knowledge of AWS data services such as S3, Glue, Athena, Redshift, or Lambda.
- Good understanding of data quality checks and transformation logic.
- Strong analytical and problem-solving skills.
Skills
SQL
AWS
ETL
Python
Reconciliation
Redshift
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