Skip to content
You must be logged in to sponsor julienledem

Become a sponsor to Julien Le Dem

I am a software architect, open source leader and entrepreneur who loves collaborating with others in Open Source projects. I started the Parquet project in collaboration with the Impala team at Cloudera back when I was at Twitter. I chaired the project for many years at the Apache foundation and Parquet is now the de-facto standard for data lakes. I later contributed to the creation of the Arrow project as a founding engineer at Dremio. Before that I received my initiation contributing to OpenSource in the Apache Pig project at Yahoo where I evolved from contributor to committer to PMC member and eventually chaired the project in 2013. More recently I started the OpenLineage project while being the CTO and co-founder of Datakin which was later acquired by Astronomer. OpenLineage came out of Marquez, the project we co-created at Wework on the data platform team.

I currently lead the OpenLineage project, facilitating discussions, ensuring all voices are heard and empowered and growing its ecosystem.

Featured work

  1. OpenLineage/OpenLineage

    An Open Standard for lineage metadata collection

    Java 1,593
  2. MarquezProject/marquez

    Collect, aggregate, and visualize a data ecosystem's metadata

    Java 1,628
  3. julienledem/brennus

    Builder pattern to generate java classes

    Java 17
  4. julienledem/Jaqen

    A type-safe heterogenous Map or a Named field Tuple depending how you looks at it.

    Scala 1

Select a tier

$ a month

Choose a custom amount.