ETL Tester with automation experience

Cognizant; Zürich; Vor Ort; CHF 80.000 - 110.000; Vollzeit

Zusammenfassung

Cognizant is seeking an experienced ETL Tester with strong automation experience to support enterprise data platforms and pipelines in Zürich, Switzerland. This fixed-term role covers design, development, and execution of tests for data ingestion, transformation, validation, and reconciliation across ETL/ELT pipelines.

You will build and maintain automation frameworks, validate data quality with SQL, and integrate tests into CI/CD workflows while collaborating with Data Engineers, QA teams, and

Qualifikationen

• Design and execute test cases for data ingestion, transformation, validation, and reconciliation across ETL/ELT pipelines.
• Build and maintain automation frameworks for data testing and regression testing.
• Validate data quality using SQL and large-scale datasets.
• Integrate automated tests into CI/CD pipelines.
• Collaborate with Data Engineers, QA teams, and business stakeholders.
• Analyze and troubleshoot test failures and data quality issues.

Aufgaben

• Design and execute test cases for data ingestion, transformation, validation, and reconciliation across ETL/ELT pipelines.
• Build and maintain automation frameworks for data testing and regression testing.
• Validate data quality using SQL and large-scale datasets.
• Integrate automated tests into CI/CD pipelines.
• Collaborate with Data Engineers, QA teams, and business stakeholders.
• Analyze and troubleshoot test failures and data quality issues.

Kenntnisse

ETL testing

SQL

Python

Java

CI/CD

Test automation

Data Warehouses

Data Lakes

Data Modeling

Data validation

Tools

Snowflake

Databricks

Azure Synapse

BigQuery

Great Expectations

dbt Tests

PyTest

Selenium

Jobbeschreibung

ETL Tester - Data Testing

Zurich, Switzerland
Fixed term role for 6 months with potential extension

Cognizant is looking for an experienced ETL Tester with strong automation experience to support enterprise data platforms and pipelines.

Key Responsibilities

• Design and execute test cases for data ingestion, transformation, validation, and reconciliation across ETL/ELT pipelines.
• Build and maintain automation frameworks for data testing and regression testing.
• Validate data quality using SQL and large-scale datasets.
• Integrate automated tests into CI/CD pipelines.
• Collaborate with Data Engineers, QA teams, and business stakeholders.
• Analyze and troubleshoot test failures and data quality issues.

Required Skills

• Strong understanding of Data Warehouses, Data Lakes, ETL/ELT pipelines, and Data Models.
• Solid experience in ETL testing, including source-to-target validation and data reconciliation.
• Hands-on experience with test automation, ideally building frameworks from scratch.
• Strong SQL and data validation expertise.
• Programming skills in Python, Java, or similar.
• Experience with CI/CD tools and automated test execution.
• Excellent analytical and problem-solving skills.

Nice to Have

• Snowflake, Databricks, Azure Synapse, BigQuery, or similar cloud data platforms.
• Great Expectations, dbt Tests, PyTest, Selenium, or equivalent tools.
• Experience in Banking, Financial Services, or large enterprise data environments.

What We're Looking For

This role is ideal for someone who understands enterprise data platforms, not just traditional ETL testing. We need a detail‑oriented ETL Tester with strong automation skills who can build scalable testing solutions and is passionate about data quality.