(Senior) Data Engineer - Freelance

5+ years working experience as a Data Engineer Experience in regulated financial services Commercial facing experience Designing and developing robust Data Pipelines using Apache Spark, Hadoop ecosystem Deep understanding of data processing Strong background in cloud infrastructure (AWS) Hands-on experience of data lakes and modern data warehouses Familiarity with orchestration, security, and network Programming experience with Scala and Python Knowledge of DBT (models, tests, documentation) General understanding of Tableau or similar BI tools Experience with relational databases, data warehouses and advanced SQL queries Experience with CI/CD & bash scripting Experience with Docker and working knowledge of Kubernetes Excellent command of written and spoken English (C1+) Excellent command of written and spoken Polish (C1+) (nice-to-have)

Manage and scale BI data infrastructure Develop and maintain data pipelines Conduct data analysis experiments Model data using data lake/warehouse concepts Optimize data performance Implement security and governance policies Collaborate with analysts and stakeholders Ensure data cleansing and coding consistency