Company at a Glance
OpenX is focused on unleashing the full economic potential of digital media companies. We do this by making digital advertising markets and technologies that are designed to deliver optimal value to publishers and advertisers on every ad served across all screens.
At OpenX, we have built a team that is uniquely experienced in designing and operating high-scale ad marketplaces, and we are constantly on the lookout for thoughtful, creative executors who are as fascinated as we are about finding new ways to apply a blend of market design, technical innovation, operational excellence, and empathetic partner service to the frontiers of digital advertising.
At OpenX Poland, we’re looking for talented, communicative, and curious engineers to join our team in Cracow, Poland.
Currently, we’re looking for a Software Developer in Test.
You will be part of the development team focused on exchange features for connected devices (CTV). Our exchange handles billions of ad requests daily connecting thousands of publishers with demand partners. Each request produces data events that have to be processed to extract business value from them.
Temporary backfill until August 31, 2027.
If you’re:
Open-minded - happy to give & receive feedback, not afraid to fail, and move on
Proactive - always want to find a satisfying solution
Self-organized and self-motivated
We want to talk to you.
Project:
The Upsiders team develops the auction and revenue mechanics that determine how transactions are priced, processed, and monetized across OpenX. Our work focuses on bid economics across both deals and the open exchange, including pricing, floors, fees, rebates, auction behavior, revenue calculation, and real-time reconciliation. We build systems that help ensure real-time platform calculations reflect actual financial processes and commercial agreements, enabling OpenX to support flexible business models, optimize monetization, and deliver accurate revenue outcomes for buyers, publishers, and internal teams.
The team is using the following technologies:
Frontend: JS/TS, React, Material UI
API: Python, Java
Backend: Java, Go, Erlang, Elixir
CICD: Cloud build, Spinnaker
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:
Test large-scale event processing systems and back-end applications
Involved in all phases of product development, starting from requirements to validation and deployment
Analyze and improve efficiency, scalability, and stability of applications
Work in a focused and nimble team that collaborates on common problems across products and across focus areas
Own components, processes, and workflows that demand professionalism, excellent communication, teamwork, and documentation skills
Create, maintain, and improve automation test suites/frameworks
Monitor and maintain QA CI pipelines, collaborate on CD enablement
Conduct root cause analysis of issues and provide solutions for better coverage and maintainability
Effectively communicate and being a crucial member of both the project teams and QA organization
Be exposed to a broader set of problems, which allows for fast career growth and proximity to abundant technical problems
Required Qualifications:
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
Desired Characteristics:
Experience in using Google Cloud Platform, k8s, and docker
Experience with UI testing
Familiarity with advertising technologies and the advertising ecosystem
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)
OpenX VALUES
Our five company values form a solid bedrock serving to define us as a group and guide the company. Our values remind us that how we do things often matters as much as what we do.
WE ARE ONE
We are one team. There are no exceptions. We are a group of strong and diverse individuals unified by a shared mission. We embrace challenges and win together as a team. We respect and care about our colleagues and cultivate an inclusive culture
WE ARE CUSTOMER CENTRIC
We innovate on behalf of our customers. We understand, respect, and listen carefully to our customers. We build great products to solve our customers’ problems. We manage our customers’ expectations clearly and honestly. We are a trusted partner to all of our customers - we act with integrity at all times. We care.
OPENX IS OURS
We are all owners of OpenX
We all have a voice to improve OpenX
We stake our personal and professional reputations on the excellence of our work
We are not interested in just "doing our jobs"; we take ownership to drive results
WE ARE AN OPEN BOOK
We understand and respect what each of us does. We are eager to teach and share what we know with others, both internally and externally. We are eager to learn from others and we ask questions internally and externally.
WE EVOLVE FAST
We take responsible risks and own and learn from our mistakes. We recognize and repeat success. We actively seek out and provide constructive feedback. We adapt quickly and embrace change. We tackle growth and learning with real urgency. We are endlessly curious.
OpenX TRAITS
Our three traits capture what makes a great team member at OpenX.
HUMBLE
Ideal team players are humble and demonstrate integrity. They put the team's success above their own, share credit generously, and value collective achievements. They are self-assured, open to coaching, and committed to continuous learning.
DRIVEN
Ideal team players are results-driven and motivated. They are curious, always seeking more to do, learn, and take on. As proactive problem-solvers, they take initiative without needing external motivation. They continuously think about the next steps and opportunities for improvement.
SMART
Ideal team players are smart and possess the intellectual acumen to understand the complexities of our organization and industry. They are interpersonally intelligent, good communicators, and exemplify sound judgment in their interactions across the company to foster a collaborative environment.
OpenX is committed to equal employment opportunities.
It is a fundamental principle at OpenX not to discriminate against employees or applicants for employment on any legally-recognized basis including, but not limited to: age, race, creed, color, religion, national origin, sexual orientation, sex, disability, predisposing genetic characteristics, genetic information, military or veteran status, marital status, gender identity/transgender status, pregnancy, childbirth or related medical condition, and other protected characteristic as established by law.
OpenX Applicant Privacy Policy
Effective Date of the Privacy Policy: November 21, 2024
