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Start.io Logo Start.io · IT - Software Development

Automation QA Engineer

Poland, Warsaw · Job Posted January 20, 2026
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Job Description

Start.io is a sell-side omnichannel advertising platform powered by real-time mobile audiences. We deliver hundreds of millions of ads per day across thousands of global leading apps and websites. Our platform uses AI to deliver more efficient, effective and precise digital advertising campaigns. Our direct integration with thousands of mobile publishers gives us access to more than 50 billion first-party data signals per day across the globe. Marketers use these anonymized signals to understand and predict consumer behavior, identify new opportunities and fuel business growth.

Job Responsibility

  • Develop and maintain automated API tests using existing framework
  • Configure and maintain CI/CD pipelines (GitHub Actions, Jenkins)
  • Analyze test failures, debug issues, and raise defects
  • Design and document test cases based on business and technical requirements for further test automation
  • Participate in test planning and review processes
  • Collaborate with developers and QA team to identify test coverage gaps

Requirements

  • 3-5 years of working experience as an Automation QA engineer
  • Strong knowledge of JavaScript/TypeScript
  • Hands-on experience with automation frameworks (Playwright, Cypress, Selenium)
  • Proficiency in API testing (REST/OpenRTB)
  • Experience working with relational and non-relational databases (SQL-based systems, MongoDB, Aerospike, etc)
  • Familiarity with CI/CD pipelines (Github Actions, Jenkins)
  • Solid understanding of software testing methodologies and best practices
  • Excellent analytical and problem-solving skills

Nice to have

  • Knowledge in the programmatic advertising landscape – DSPs, SSPs, exchanges – significant advantage
  • Understanding of microservices architecture
  • Experience with SDK testing
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