Senior Software Engineer in Test IV (TS/Python)

OpenX is focused on unleashing the full economic potential of digital media companies by creating digital advertising markets and technologies that deliver optimal value to publishers and advertisers across all screens. The company has a team experienced in designing and operating high-scale ad marketplaces and applies a blend of market design, technical innovation, operational excellence, and empathetic partner service to digital advertising.

• 5+ years of professional experience in test automation or software engineering in test.
• Strong hands-on experience with TypeScript and modern frontend test automation frameworks such as Playwright or Cypress.
• Ability to design, debug, extend, and maintain test automation frameworks and shared testing utilities.
• Strong understanding of modern frontend applications, user workflows, API integration, asynchronous behavior, and common UI test instability sources.
• Experience with API testing and practical experience with Python, preferably with pytest, or strong willingness to work with Python-based API test automation.
• Practical knowledge of test design techniques and risk-based testing.
• Experience working with CI/CD tools and improving automated test execution in CI environments.
• Excellent troubleshooting skills and ability to triage complex issues across application, test, and infrastructure layers.
• Experience working in an agile engineering environment.
• Strong communication skills and ability to work effectively with SDETs, software engineers, Product, and UX.
• Communicative Polish and English.

Nice to have:

• Experience with Python test automation.
• Experience testing React-based applications.
• Experience with Google Cloud Platform, Kubernetes, Docker, Spinnaker, or similar cloud and deployment technologies.
• Experience with API contract testing, integration testing, or service-level testing.
• Familiarity with advertising technology, digital media, or the advertising ecosystem.
• Analytical, open-minded, proactive, self-organized, self-motivated, and a clear communicator who helps raise engineering quality.

• Design and maintain reliable automated tests across TypeScript-based UI and Python API layers.
• Own and evolve test automation for complex frontend user workflows.
• Build, maintain, and improve automated UI test suites using Playwright and TypeScript.
• Contribute to API integration and end-to-end testing strategy, automation, and coverage using Python and pytest.
• Participate in all phases of product development from requirements to release readiness.
• Partner with software engineers, product managers, and UX designers to identify quality risks early and improve testability.
• Apply risk-based testing practices and make pragmatic decisions about test coverage at multiple levels.
• Improve reliability, speed, and maintainability of test automation frameworks and CI/CD pipelines.
• Investigate test failures, flaky tests, and production issues, driving root cause analysis and improvements.
• Communicate quality risks, trade-offs, and recommendations clearly to stakeholders.

OpenX is committed to equal employment opportunities and does not discriminate on any legally-recognized basis including age, race, creed, color, religion, national origin, sexual orientation, sex, disability, genetic information, military or veteran status, marital status, gender identity, pregnancy, childbirth or related medical condition, and other protected characteristics as established by law.