Senior Test Automation Engineer IV

At OpenX Poland, we are looking for a talented, communicative, and curious Software Development Engineer IV in Test to join our team in Cracow, Poland. You will join the Platform Team at OpenX, specifically focusing on the Marketplace, which is responsible for the maintenance and development of the UI and API components of our platform. Our exchange handles billions of ad requests every day, connecting thousands of publishers with demand partners across the global advertising ecosystem. The platform runs in the cloud across multiple regions and operates at a scale where performance, reliability, correctness, and every millisecond matter. You will be part of a cross-functional platform engineering team focused on the Marketplace workflows that support how our core exchange operates. The components and tools help internal and external users manage marketplace settings, configure integrations for publishers and demand partners, review transaction setups, and ensure that platform behavior