Data Engineer - Spark/Scala Backend & ETL (Hybrid Warsaw)

Sii Poland is seeking a Data Engineer in Warsaw to modernize an investment bank's backend data processing platform. You will build scalable pipelines with Scala/Spark and Java, optimize Spark workloads, and collaborate with cross-functional teams in a hybrid work setting with 2–3 days in the office each week.

The role emphasizes data-driven development, ETL/ELT design, and delivering data solutions for banking systems while maintaining high code quality and CI practices.