Data Test Lead: Automation & Data Quality

Cognizant; Zürich; On-site; CHF 120,000 - 180,000; Full time

Job summary

Cognizant in Zurich, Switzerland, is seeking a Test Lead - Data Testing on a 12 months contract to design, build, and maintain automation for data-related testing onsite in Zürich. You will strengthen regression testing, improve coverage, and accelerate data platform releases.

The role requires leading end-to-end test management for data transformation programs, deep knowledge of data platforms, SQL validation, and experience linking tests with CI/CD pipelines.

Qualifications

• Proven experience leading end-to-end test management for large-scale data transformation, migration, or enterprise platform modernization programs.
• Strong understanding of data platforms and enterprise data concepts (data warehouses, data lakes, ETL/ELT, data models, governance).
• Experience with SQL and querying large datasets to validate data accuracy and integrity.

Responsibilities

• Define end-to-end test strategy, test plan, scope, approach, entry/exit criteria, and quality gates across teams.
• Lead test planning, estimation, scheduling, and coordination of SIT, E2E, Regression, and UAT activities across cross-functional teams.
• Design, build, and maintain an automation framework for regression testing of data platforms and pipelines.
• Develop automated test cases covering data ingestion, transformation, validation, and reconciliation scenarios.
• Execute and maintain automated test execution cycles, integrating with CI/CD pipelines.
• Identify gaps in existing test coverage and design automated checks to close them.
• Collaborate with data engineers, QA, and business teams to translate data flows into test scenarios.
• Troubleshoot test failures, differentiate data defects from test/environment issues.
• Document test frameworks, test cases, and results clearly.
• Continuously improve automation coverage, execution speed, and reliability.

Skills

Test leadership

End-to-end testing

Data platforms

SQL querying

CI/CD integration

Analytical thinking

Data quality focus

Tools

Selenium

Pytest

dbt tests

Great Expectations

Job description

Cognizant in Zurich, Switzerland, is seeking a Test Lead - Data Testing on a 12 months contract to design, build, and maintain automation for data-related testing onsite in Zürich. You will strengthen regression testing, improve coverage, and accelerate data platform releases.

The role requires leading end-to-end test management for data transformation programs, deep knowledge of data platforms, SQL validation, and experience linking tests with CI/CD pipelines.