Quality assurance engineer (auto) in data systems

We are looking for an experienced, hands-on QA Team Lead to lead the quality assurance of our complex data systems. This role combines technical leadership, team management, manual exploratory testing and advanced automation. You will take ownership of the overall QA strategy, guide a small team of QA Engineers and remain actively involved in testing complex backend systems, databases and data pipelines. If you are passionate about data integrity, enjoy breaking complex systems and know how to develop both people and testing processes, you’ll fit right in.

• Design and execute comprehensive manual and automated testing strategies for complex data pipelines, databases, APIs and backend systems.
• Lead, mentor and support a small team of QA Engineers while remaining actively involved in the team’s daily technical work.
• Build, maintain and scale robust automation frameworks using Python, Java or TypeScript, with a strong focus on data validation and system integration.
• Use SQL and other tools to validate data accuracy, consistency and completeness across relational and non-relational databases.
• Define testing priorities, distribute tasks, review test coverage and ensure the team delivers high-quality results.
• Investigate complex defects, perform root-cause analysis and work closely with developers and data engineers to resolve issues.
• Establish and improve QA methodologies, testing standards, documentation and automation practices.
• Partner closely with Data Engineers, Developers and Product Managers to identify risks, uncover edge cases and ensure seamless data flow.
• Evaluate testing results, communicate risks and provide clear recommendations regarding release quality.

• 5+ years of experience in QA engineering, including hands-on testing of complex data systems, ETL pipelines, APIs or large-scale backend architectures.
• Previous experience leading, mentoring or coordinating QA Engineers while continuing to work in a hands-on technical capacity.
• Strong experience building and maintaining automation frameworks and working with tools such as Selenium, Playwright, RestAssured or Postman.
• Strong SQL skills and proven experience validating data integrity across relational or non-relational databases.
• Strong experience in exploratory, integration, regression and end-to-end testing.
• The ability to investigate complex backend issues, understand system integrations and perform detailed root-cause analysis.
• A leader who works alongside the team, takes ownership of challenging testing tasks and remains actively involved in automation and quality assurance.
• Full professional fluency in English, both written and spoken.

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