Senior Data Engineer

@ EER Poland

About the Company

EER Poland is a leading mobile marketing and audience platform empowering the mobile app ecosystem. They directly integrate with over 500,000 monthly active apps and process massive volumes of first-party data to drive intelligent, real-time decisions and fuel growth for partners.

About the Role

The Senior Data Engineer role at EER Poland involves solving complex problems at scale, working with real-time data pipelines, distributed systems, and performance optimization in a hybrid work environment (2 days on-site: Mondays & Wednesdays in Warsaw).

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, and fraud detection 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 a range of technologies including Flink, Spark, Kafka, Protobuf, Kubernetes, Argo WF, Jenkins, GitHub, using Golang, Java/Scala, and Python.
• Utilize modern AI-assisted development tools to enhance coding, testing, and debugging.
• Participate in an on-call rotation to support production systems ensuring high availability.
• Collaborate in an Agile environment, contributing ideas and taking initiative on projects.

Requirements

• 4+ years of backend or data engineering experience.
• 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 and observability tools (Prometheus/Grafana) and distributed systems.
• Ability to switch contexts effectively across projects and technologies.
• Self-learner, responsible, independent, strong team player.
• Excellent communication skills.

Preferred Experience

• Building and maintaining high-volume, low-latency pipelines.
• Experience with Agile methodologies.
• Creative problem-solving in complex, multi-task environments.

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.

Key skills/competency

• Data Pipelines
• Real-time Streaming
• Batch Processing
• Distributed Systems
• Performance Optimization
• Golang
• Java/Scala
• Python
• Kubernetes
• Cloud Infrastructure