ETL Testing

9 hours ago

Chennai, Tamil Nadu, India Cognizant Technology Solutions Full time

AIA – Face to Face Interview – Chennai

Skill: ETL Testing

Experience - 4 to 9 Years

Location: Chennai

Drive: 06 Dec 2025

Key responsibilities

  • Design and execution: Develop and execute test plans, test cases, and scripts to validate the entire ETL process, from data extraction to transformation to loading.
  • Data validation: Verify the accuracy, completeness, and integrity of data by comparing source and target data, often using SQL queries and ETL tools.
  • Defect management: Identify, document, and report defects and issues found during testing, and work with development teams to resolve them.
  • Collaboration: Work closely with ETL developers, data analysts, and business stakeholders to understand requirements and ensure the final data meets business needs.
  • Documentation: Maintain test cases, test scripts, and detailed documentation for testing procedures and results.
  • Automation: Develop and maintain automated test suites to improve efficiency, especially for regression testing.
  • Performance testing: Validate the performance and reliability of ETL operations to ensure they can handle the required data volumes.

Required skills and qualifications

  • Technical skills: Strong proficiency in SQL is essential for data validation. Knowledge of data warehousing concepts (like dimensional modeling) and various ETL tools (such as Informatica, Talend, or SSIS) is also required.
  • Analytical skills: Ability to analyze complex data sets and identify inconsistencies or discrepancies.
  • Communication skills: Effectively communicate test findings and potential solutions to both technical and non-technical audiences.
  • Problem-solving: Ability to troubleshoot and find the root cause of data quality issues.

Education: A bachelor's degree in computer science, information technology, or a related field is often preferred

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