Data QA Tester / Data Warehouse Tester

Salary: 1000–1100 PLN/day on B2B

Work model: Hybrid from Gdynia, Gdańsk, Warszawa, or Łódź (2–3 days per week from the office)

Why choose this offer?

• Flexible work organization
• International work environment with daily English-language interaction
• Scandinavian organizational culture supporting work-life balance
• Time for additional training financed by Jit
• Regular community integration meetings

Project

We are looking for a highly skilled QA Tester with strong experience in Data Warehouse Testing to join an ongoing data-focused initiative. The project is based on modern cloud technologies, including Snowflake, AWS, and dbt, supporting complex ETL processes and large-scale data transformations.

You will collaborate closely with Data Engineers and Developers, ensuring data accuracy, validating business-critical data flows, and supporting continuous improvements of the data platform. The role requires someone who can quickly integrate into an existing environment and deliver value from day one.

Responsibilities

• Validate complex data pipelines and ETL processes
• Perform end-to-end testing of data warehouse solutions
• Verify data quality, consistency, completeness, and accuracy
• Create and execute SQL-based test scenarios
• Review and validate data transformations implemented in dbt
• Support automation of data validation processes
• Collaborate closely with developers, data engineers, and business stakeholders
• Identify, document, and track defects
• Contribute to continuous improvement of testing processes

Expected competences and knowledge

• Proven experience in Data Warehouse Testing
• Hands-on experience with Snowflake
• Strong knowledge of SQL and data validation techniques
• Experience testing ETL/Data Integration processes
• Experience working with AWS
• Knowledge of dbt (Data Build Tool) and testing data transformations
• Ability to analyze large datasets and identify data quality issues
• Experience working in Agile environments
• Familiarity with Jira and test management tools

Technologies you'll work with

• Snowflake
• SQL
• dbt
• AWS
• Jira
• qTest
• Python
• JavaScript
• TypeScript
• Playwright