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OpenX is an ad tech company that drives optimal value for advertisers through high-scale marketplaces across all screens
The Role
The role involves testing large-scale event processing systems, improving applications' efficiency, maintaining automation test suites, and collaborating with teams throughout development phases.
Summary Generated by Built In
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.
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
Applicants can review our Applicant Privacy Policy at any time by visiting the following link: https://www.openx.com/privacy-center/applicant-privacy-policy/.
Effective Date of the Privacy Policy: November 21, 2024
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
Cassie Nufable
Senior Manager, FP&A
Ben White
Sr Principal Software Engineer
Nathan Rideout-Cadieux
Director, Buyer Development
Cheryl Tan
Director, Account Mgmt Buyer Development
Alexa Ofsanko
Sr. Account Director
Qixuan Yu
Data Scientist II
OpenX Technologies Compensation & Benefits Highlights
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Healthcare Strength — Health coverage is described as comprehensive across medical, dental, and vision, with immediate eligibility and dedicated mental-health support such as employer-paid therapy and coaching. Feedback suggests multiple plan options and strong employer contributions enhance perceived value.
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Parental & Family Support — Policies include fully paid leave for birthing, non-birthing, and adoptive parents, along with family-formation and caregiving support. Family medical leave and region-appropriate programs further reinforce this pillar.
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Wellbeing & Lifestyle Benefits — A remote-first model pairs with home-office and wellness stipends, flexible scheduling, and company-wide recharge days. Additional lifestyle programs such as fitness support, volunteering, and workplace extras contribute to everyday experience.
OpenX Technologies Insights
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The Company
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.
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OpenX Technologies Offices
Hybrid Workspace
Employees engage in a combination of remote and on-site work.
Typical time on-site:
Not Specified
