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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
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.
We are seeking a driven and pragmatic Senior Data Scientist to join our Data Science Research team on a 1.5-year temporary contract as a parental leave replacement. This hybrid role combines team leadership with hands-on technical contributions. You will lead a group of skilled engineers and data scientists, collaborate with cross-functional stakeholders, and ensure the successful delivery of impactful, high-quality solutions.
If you’re:
Proactive - always seeking a satisfying solution to unexplored questions
Open-minded - happy to give & receive feedback, not afraid to fail and move on
Persistent - exhibit the skills and attitude to lead a project to success as well as how to extract yourself from common pitfalls
Creative - researching and developing a solution to challenging problems with large datasets
We want to talk to you.
1.5-Year Contract (Maternity Leave Coverage)
What we offer
- Employment contract (24 437 - 27 300 PLN gross/monthly) OR B2B (190 - 213 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 Responsiebilities
- Lead a team of data scientists and engineers in delivering high-quality insights, products and services with measurable business impact.
- Own the methodology that powers OpenX’s experimentation framework, and the analysis of experimental results
- Act as a proactive driver keeping projects moving forward, focusing on solutions over obstacles, and maintaining momentum even in uncertain situations.
- Prioritize team workload effectively, make thoughtful trade-offs, and balance excellence with practicality recognizing when "good enough" is sufficient.
- Mentor, coach, and guide data scientists by helping them set career goals and chart actionable development plans.
- Onboard new team members and cultivate a collaborative, inclusive, and high-performing team culture.
- Work closely with stakeholders across the business to align on priorities, share progress transparently, and ensure ongoing communication.
- Partner with business teams to align technical priorities with strategic goals and ensure measurable outcomes.
Required Qualifications
- 5+ years of experience in data science, with a strong technical foundation.
- 1+ year of experience leading data science teams or technical projects.
- Demonstrated ability to prioritize effectively, delegate tasks, and manage competing demands.
- Excellent communication, leadership, presentation, and collaboration skills.
- Proficient in Python and SQL
- Hands on experience on experiment design (A/B and Switchback) and causal inference techniques
- Deep understanding of probability and statistics, with experience applying methods at scale.
- Bachelor’s degree in Statistics, Mathematics or equivalent practical experience
- Working proficiency in both Polish and English.
Desired Characteristics
- Experience mentoring and guiding junior team members.
- Strong decision-making skills with a pragmatic mindset and ability to avoid over-engineering.
- Hands-on experience with cloud platforms, especially Google Cloud Platform (GCP)
- Background in digital media, marketing technology, or advertising technology industries.
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
What the Team is Saying
Cassie Nufable
Senior Manager, FP&A
Ben White
Sr Principal Software Engineer
Qixuan Yu
Data Scientist II
Nathan Rideout-Cadieux
Director, Buyer Development
Cheryl Tan
Director, Account Mgmt Buyer Development
Alexa Ofsanko
Sr. Account Director
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The Company
What We Do
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. We’re an independent omni-channel supply-side platform (SSP) and a global leader in supply-side targeting, transparency, and sustainability. Through our 100% cloud-based tech stack, we power advertising across CTV, app, mobile web, and desktop, enabling publishers to deliver marketers with improved performance and dynamic future-proofed solutions. With a 17-year track record of programmatic innovation, we're a direct and trusted partner of the world’s largest publishers, working with more than 130,000 premium publisher domains and over 100,000 advertisers.
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
