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Salary: PLN 22,595 - 25,254 / monthly
OpenX is a digital advertising platform company focused on unleashing the economic potential of digital media companies through high-scale ad marketplaces and technologies. The company operates at massive scale: 370+ billion ad requests daily, 120,000+ CPU cores, 140+ TB RAM, and 50+ PB of data per week, with 1,200+ production deployments monthly on a 100% cloud-based GCP platform.
You will join the Audiences & Segments team as a Senior Software Engineer IV, designing and implementing scalable integrations that enhance platform performance. The team focuses on building audience and segment capabilities—discovering, enriching, filtering, evaluating, and activating segments at scale. Core work includes AI-powered segment discovery, international audience targeting, contextual intelligence, data marketplace features, household graph research, and scalable first-party segment pipelines to support a cookieless future.
Key responsibilities include:
- Design high-performance, distributed, low-latency systems
- Architect, create, and deliver new features and functionality
- Work with Product to drive requirements and own projects end-to-end
- Collaborate with Engineering and Product teams across multiple locations
- Analyze and improve efficiency, scalability, and stability of servers and processes
- Think long-term, avoid band-aid solutions, and identify and remove unnecessary complexity
The role offers flexible working hours and remote work options. You'll work with cutting-edge cloud technologies, solve problems at scale, and join a growing company with a strong engineering culture.
REQUIREMENTS:
- 5+ years experience building SaaS applications using Python
- Experience with database system design (RDBMs like MySQL/Postgres or NoSQL)
- Experience with Amazon Web Services or Google Cloud Platform
- Deep knowledge of cloud solutions and system architecture with cost considerations
- Experience with REST/GraphQL APIs
- Experience with Kubernetes, Docker, CI/CD, and SQL (BigQuery)
- Communicative Polish and English language skills
DESIRED:
- Experience with JavaScript/TypeScript and Java
- Experience with Airflow and Cloud Composer
- Experience creating, maintaining, and modifying DAGs for data pipeline orchestration
- Background in digital media, marketing technology, or advertising technology
