Professional experience developing in Go and/or Python. Strong experience with the modern data stack, including tools and concepts like: Batch and Stream processing (Spark, Flink), Data Transformation (dbt), Data Warehousing, Data Lakes, and Open Table formats (Iceberg, Delta Lake), Data Cataloging and Governance (AWS Glue, LakeFormation). Hands-on experience with cloud and data technologies like Google Cloud (BigQuery, Pub/Sub) or AWS equivalents. Typically 5+ years of professional software engineering experience.