Julien Le Dem

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Co-creator of Apache Parquet, Chief Architect

Julien Le Dem is the Chief Architect of Astronomer and Co-Founder of Datakin. He co-created Apache Parquet and is involved in several open source projects including OpenLineage, Marquez (LFAI&Data), Apache Arrow, Apache Iceberg, and others. Previously, he was a senior principal at WeWork, a principal architect at Dremio, a tech lead for Twitter’s data processing tools, where he obtained a two-character Twitter handle (@J_), and a principal engineer and tech lead working on content platforms at Yahoo, where he received his Hadoop initiation. His French accent makes his talks particularly attractive.

Julien Le Dem's Articles and Resources

Subsurface Session

Ten years of Building Open Source Standards: From Parquet to Arrow to OpenLineage

Over the last decade, Julien Le Dem has been lucky enough to contribute to a few successful open source projects in the data ecosystem. In this talk, Julien will share the story of how these projects came to be and…

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