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September 11, 2026

Senior Data engineer

Senior • On-site

Warsaw, Poland

Quick Facts

Senior Data Engineer role focused on modernizing and unifying a global data ecosystem by building a next-generation data platform leveraging Databricks on AWS, Medallion Architecture, and ClickHouse for low-latency analytics.

Description

You will play a key technical role within a dedicated squad, combining hands-on development with end-to-end delivery ownership. The work emphasizes production-grade data pipelines, driving data quality, establishing automated testing practices, and translating business requirements into scalable engineering solutions.

Responsibilities

  • Design and build production-grade data pipelines and data platform components using Databricks on AWS, PySpark, Python, and SQL.
  • Implement scalable data models based on the Medallion Architecture framework (Bronze, Silver, and Gold layers).
  • Architect and optimize low-latency, real-time analytics data paths using ClickHouse.
  • Drive engineering quality by building automated unit, integration, and data quality testing frameworks without relying on dedicated QA resources.
  • Collaborate directly with client stakeholders and team leadership to refine backlog items, clarify requirements, and run technical discussions.
  • Conduct design and code reviews to enforce system reliability, maintainability, and architectural standards.
  • Provide pragmatic support and maintenance for a legacy Hadoop/Kafka reporting platform (~10% effort split) while supporting the transition to the new platform.

Requirements

  • 5+ years of commercial data engineering experience building, scaling, and maintaining enterprise data platforms.
  • Strong hands-on experience with Databricks, Spark/PySpark, Python, and advanced SQL.
  • Proven track record of designing data models and architectures using the Medallion Architecture pattern.
  • Practical experience implementing high-volume, low-latency analytics solutions using ClickHouse.
  • Solid engineering background in automated testing methodologies (unit, integration, and data quality validation) within data pipelines.
  • Demonstrated capability to translate complex business needs into technical designs and clear backlog requirements.

Would be a plus

  • Practical experience within the AWS cloud ecosystem.
  • Familiarity with real-time streaming architectures and frameworks such as Apache Kafka.
  • Domain knowledge in payment processing, financial services, or merchant reporting systems.
  • Conceptual or hands-on exposure to MLOps frameworks or integrating AI/ML workflows into Databricks platforms.

Benefits

  • Opportunity to work on bleeding-edge projects
  • Work with a highly motivated and dedicated team
  • Competitive salary
  • Flexible schedule
  • Benefits package (medical insurance, sports)
  • Corporate social events
  • Professional development opportunities
  • Well-equipped office

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