Currently, we’re looking for a Software Developer in Test IV. Temporary backfill until August 31, 2027.
Our exchange handles billions of ad requests daily, connecting thousands of publishers with demand partners across the global advertising ecosystem.
You will be part of a product engineering team focused on business-critical workflows that support how advertising transactions are configured, processed, and validated across OpenX. As an SDET IV, you will take ownership of quality for business logic, backend APIs, data flows, and cross-system integrations. You will design and improve automated test coverage, identify risks early, support CI/CD and release readiness, and help the team ensure that platform behavior remains consistent with business requirements and financial processes.
Team setup
You will join a cross-functional product engineering team with a dedicated Product Manager, Scrum Master, Engineering Manager, QA engineers, frontend and backend engineers, and support from data analysts and UX designers when needed. This setup gives you direct access to product context and a real opportunity to influence business requirements, solution design, test strategy, and release quality.
If you’re:
Analytical - able to connect business requirements, system behavior, and product risk.
Open-minded - happy to give and receive feedback, not afraid to fail, and move on.
Proactive - always looking for practical solutions and ways to move forward.
Self-organized and self-motivated.
We want to talk to you.
What we offer:
- Employment contract (22 595 - 25 254 PLN gross/monthly) OR B2B (181 zł - 202 zł PLN net/hourly)
- Working with the newest technologies such as Cloud Computing (GCP)
- Challenges at work that are difficult to find anywhere else!
- Solving important problems in a scale
- Joining a company that is growing and scaling
- Flexible working hours & remote work option
Key Responsibilities
Validate backend business logic in large-scale event processing systems running in the cloud, ensuring it behaves consistently with business requirements and financial processes.
Test backend APIs, data flows, and cross-system integrations that support business-critical workflows.
Build domain understanding and analyze requirements, business rules, and technical designs to identify meaningful test scenarios, edge cases, and risks.
Read, analyze, debug, and reason about application and test code to investigate issues and understand system behavior.
Create, maintain, and improve automated test suites and test frameworks.
Monitor and maintain QA CI pipelines and support continuous delivery.
Conduct root cause analysis of issues and provide solutions for better coverage and maintainability.
Collaborate closely with engineers, Product, QA, and other stakeholders throughout the full development lifecycle.
Required Qualifications
5+ years of experience in test automation and software testing.
Strong Python skills for test automation, debugging, and framework maintenance.
Experience testing backend APIs and business logic.
Experience creating, maintaining, and improving automated test suites or test frameworks.
Experience with CI/CD tools such as Jenkins, Spinnaker, or Cloud Build.
Ability to read, analyze, debug, and reason about application or test code.
Excellent troubleshooting skills to triage complex issues.
Strong communication skills, including the ability to raise risks, ask clarifying questions, challenge assumptions, and explain findings clearly.
Experience working in an agile, cross-functional engineering environment.
Ability to communicate effectively in Polish and English.
Desired Characteristics
Familiarity with Java or experience working with Java-based systems.
Experience with Google Cloud Platform, Kubernetes, and Docker.
Experience with advertising technology, marketplace platforms, financial workflows, or revenue-related systems.
Our benefits (on employment contract):
- 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)
Skills Required
- 5+ years of test automation experience
- Proficiency in Java OR Python and ability to improve, debug, modify and maintain an automation framework codebase
- Experience using CI/CD tools like Jenkins, Spinnaker, or Cloud Build
- Excellent troubleshooting skills to triage complex issues
- Experience operating in an agile environment
- Communicative Polish and English languages
- Bachelor's degree in Computer Science or equivalent degree
What the Team is Saying
OpenX Technologies Compensation & Benefits Highlights
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Healthcare Strength — Company materials describe competitive medical, dental and vision coverage, employer‑paid therapy and life coaching, and wellness stipends. Mental‑health programs are emphasized alongside core healthcare as part of a holistic package.
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Parental & Family Support — Company communications highlight fully paid parental leave for birthing, non‑birthing, and adoptive parents, plus family‑formation and caregiving support. Day‑one eligibility and fertility options in public listings reinforce a family‑friendly design.
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Leave & Time Off Breadth — Public listings describe unlimited or flexible PTO, extended holidays, company‑wide recharge days, and birthday time off. Remote‑friendly scheduling is positioned to make time‑off policies practical in day‑to‑day use.
OpenX Technologies Insights
What We Do
OpenX is The Intelligent SSP™ (supply-side platform), simplifying advertising for marketers, advertisers, and publishers worldwide. As one of the largest SSPs globally, OpenX combines the industry’s only fully cloud-based infrastructure with leading AI capabilities to make digital advertising easier and more effective across every format, including CTV. Built to responsibly deliver quality, performance, and adaptability, OpenX makes digital advertising safer, smarter, and built for what’s next. Learn more at www.openx.com.
Why Work With Us
At OpenX, we value curiosity, innovation, and diversity. We are passionate about pushing the boundaries of ad tech and finding new ways to deliver value to our partners and we know our best chance of delivering is by creating diverse and inclusive teams where employees can do their best work being their authentic selves.
Gallery
OpenX Technologies Offices
Hybrid Workspace
Employees engage in a combination of remote and on-site work.
