Senior Data Engineer / Spark Developer joining a Data Platform team to design and build data reconciliation, quality, and Data Lakehouse (Raw/Bronze/Silver/Gold) solutions using Apache Spark (PySpark/Spark SQL), MongoDB, and Apache Iceberg. Also handles CI/CD (Jenkins), Docker/Kubernetes deployments, and Prometheus/Grafana monitoring; hybrid with 1–2 office days per week in Wrocław.
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