Julien Le Dem is the OpenLineage project lead at the LFAI&Data. He co-created the Parquet file format and is involved in several open source projects including OpenLineage, Marquez, Arrow, Iceberg and a few others. He was the Chief Architect of Astronomer and Co-Founded Datakin. Previously he held technical leadership positions at Wework, Dremio on the founding team, Twitter, where he also obtained a two-character Twitter handle (@J_); and Yahoo!, where he received his Hadoop initiation. His French accent makes his talks particularly attractive.