Data Engineer for AdTech company - Warsaw/hybrid/B2B

EER Poland • Capon Bridge, WV

89d

About The Position

The company is a leading mobile marketing and audience platform that empowers the mobile app ecosystem. With direct integration into over 500,000 monthly active apps, this platform processes massive volumes of first-party data to drive intelligent, real-time decisions and fuel growth for our partners. We are looking for a Senior Data Engineer to join Data Platform team - someone who thrives on solving complex problems at scale, enjoys working across technologies, and is passionate about real-time data pipelines, distributed systems, and performance optimization.

Requirements

• 4+ years of experience in backend or data engineering.
• Strong proficiency in Golang and Java/Scala; experience with Python & SQL.
• Hands-on experience with streaming platforms (Flink, Spark, Kafka).
• Production experience with Kubernetes and containerized services.
• Solid knowledge of cloud infrastructure (AWS / GCP / OCI).
• Familiarity with CI/CD, observability tools (Prometheus/Grafana), and distributed systems.
• Versatile and able to switch contexts effectively across projects and technologies.
• Self-learner, responsible, independent, and a strong team player.
• Excellent communication skills.

Nice To Haves

• Building and maintaining high-volume, low-latency pipelines.
• Agile methodology experience.
• Initiative and creative problem-solving in complex, multi-task environments.

Responsibilities

• Develop and maintain real-time streaming and batch data pipelines processing billions of records per day.
• Own services and infrastructure for request enrichment, data exports, campaign analytics, fraud detection, and more, handling hundreds of thousands of requests per second with strict low-latency SLAs.
• Build end-to-end solutions from design through deployment and monitoring.
• Develop monitoring and alerting for critical Big Data pipelines.
• Work with technologies including Flink, Spark, Kafka, Protobuf, Kubernetes, Argo WF, Jenkins, GitHub, writing in Golang, Java/Scala, and Python.
• Use modern AI-assisted development tools (e.g., GitHub Copilot, Cursor) to enhance coding, testing, and debugging.
• Participate in a shared on-call rotation to support production systems and ensure high availability.
• Collaborate in an Agile environment, contributing ideas and taking initiative on projects.

Benefits

• Competitive salary
• 20 days of paid vacation (plus Polish public holidays).
• Gym membership.
• 1-week annual workation within the European Union.
• Opportunity to work with a small, skilled team on high-impact projects.

What This Job Offers

• Career Level: Senior