Blog/Jan Kossmann

Jan Kossmann

Staff Software Engineer

Jan Kossmann is a Staff Software Engineer at Snowflake.

APR 30, 2026Core Platform

Snowflake Optima Metadata: Smarter Pruning Through Workload Intelligence

Stefan Mandl +3

MAR 26, 2025Data Engineering

Pruning for Iceberg: 90% of an Iceberg Is Underwater

Jan Kossmann +2