Software Development Engineer IV – Test, TS/Python

🕒 June 3

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OpenX

WebsiteLinkedInAll Job Openings

201 - 500 employees

Founded 2008

💰 Secondary Market on 2015-05

Advertising

OpenX is an independent supply-side platform specializing in ad tech, enabling publishers and advertisers to achieve better ad buying and selling experiences with a focus on addressability, transparency, and sustainability. Established in 2008, OpenX provides omnichannel targeting capabilities across all channels, including CTV, and integrates seamlessly with various data sets and identity types. As the first Net-Zero verified adtech company, OpenX emphasizes responsible media practices, helping clients reduce their environmental impact while supporting social initiatives. They offer a platform that democratizes identity access for marketers, allowing for seamless audience targeting similar to walled gardens. OpenX has established itself as a leader in programmatic advertising, working with high-profile clients to integrate their technology efficiently and effortlessly.

📋 Description

• 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. • Be involved in all phases of product development, from requirements and solution design to validation, deployment, and 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 unit, integration, API, and end-to-end levels. • Improve the reliability, speed, and maintainability of test automation frameworks and CI/CD pipelines. • Investigate test failures, flaky tests, and production issues, and drive root cause analysis with actionable improvements. • Communicate quality risks, trade-offs, and recommendations clearly to engineering and product stakeholders.

🎯 Requirements

• 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 sources of UI test instability. • 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.

🏖️ Benefits

• Annual performance bonus • Tax-deductible system due to copyright protection: 75% • Private health care for you and your family (covered by OpenX) • Private life and travel insurance (Covid insurance included) • MultiKafeteria program • Training: access to the LinkedIn learning platform and Tech workshops • Holiday Allowance • Pension scheme (PPK from PZU) • Additional paid day off • Free parking lot • Access to peer to peer recognition platform • Monthly work-from-home allowance and one-time payment when you join us to help you set up your home office • We celebrate team members' important personal milestones (vouchers, gifts)