Big Data Engineer
PLN 23,500 – PLN 26,000 / mth base salary
Posted 3 Jul 2026
Advertised as “Big Data Engineer IV”
BranchFactor Summary
The original posting with the fluff stripped out
- Level
- IV
- Expected experience
- 8+ yrs
- Management level
- Individual contributor
- Employment
- Hybrid
- Contract
- Full-time
| Base salary | PLN 23,500 – PLN 26,000 / mth |
|---|
Field of studyComputer Science, Physics (or related)
Study levelBachelor's or higher
Company at a GlanceOpenX 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.
You will work in all aspects of agile application development, including our enterprise platform that interfaces with a multitude of services that are dependent on to deliver billions of requests per day. Your opinions will be important in all phases of product development, starting from requirements to validation and deployment.
Working on the enterprise platform, you will be working with multiple distributed teams to architect, create, and deliver new features and functionality in order to deliver the best possible advertising experience in the market. Scalability, performance, and rock-solid reliability are all factors to consider with every line you code.
The Team and Project:
You will be part of the core data platform team. 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. Daily our applications produce more than 1PB of data.
Key responsibilities:
- Design large-scale data processing systems.
- Work with Product to drive the requirements, and own the project end-to-end.
- Analyze and improve the efficiency, scalability, and stability of applications.
- Think long-term and be unsatisfied with band-aids.
- Identify unnecessary complexity and remove it.
Required Qualifications:
- 8+ years experience in Java or Scala development (Python is a plus)
- 3+ years of experience in Big Data systems development
- Experience building complex data pipelines, including SQL-based transformations with tools such as dbt or Dataform, and large-scale data processing with distributed frameworks such as Apache Spark.
- Expertise using BigQuery or other data warehouses including performance tuning and monitoring.
- Understands data orchestration tools like Airflow to extend it with new data pipelines and troubleshoots its operational issues.