Data Conference Databasea Query.Farm index
Speakers

Julien Le Dem

Employers on the program

  1. 2026Apache Software Foundation1 talk
  2. 2022–2026Datadog15 talks
  3. 2022–2023Astronomer3 talks
  4. 2020–2021Datakin3 talks

Bluesky: @julien.ledem.net

Events21
Conferences12
Talks234 keynotes
Years active2020–2026
Talk freshness747 different talks in 12 · 2 circuits, 24 monthsMiles between events26,82817 in-person events · 4 countries

The year around now

Talks in the past 12 months and announced talks ahead, one row per conference, January to December. Hover a mark for the talk.

JanFebMarAprMayJunJulAugSepOctNovDecIceberg SummitIceberg SummitData Engineering Open ForumData Engineering Open ForumOpenXDataOpenXDataData CouncilData CouncilThe DiveThe DiveAI By the BayAI By the Bay
Held in the past 12 months Next 12 months Today, Nov 10, 2026

Appearances by year

201920202021202220232024202520262027
  • Data Council
  • Airflow Summit
  • AI By the Bay
  • Iceberg Summit
  • Subsurface
  • Berlin Buzzwords
  • Budapest Data+AI Forum
  • Chill Data Summit
  • 4 other conferences

Talks

DateEventConferenceRoleTitleLinks
Jun 1, 2026The Dive 2026The DivekeynoteColumn Storage for the AI Era
as Datadog
Examines the proliferation of new columnar formats (Lance, Fastlanes, Nimble, Vortex, AnyBlox, F3) and how to evolve Parquet/Arrow/Iceberg for AI-era demands…Show less

Examines the proliferation of new columnar formats (Lance, Fastlanes, Nimble, Vortex, AnyBlox, F3) and how to evolve Parquet/Arrow/Iceberg for AI-era demands without fragmenting.

Jun 1, 2026The Dive 2026The DivepanelistPanel: The Future of Open Table Formats
as Datadog
May 12, 2026AI Council 2026Data CounciltalkThe deconstructed database at Datadog Database internals
as Datadog
Apr 29, 2026OpenXData 2026 (April)OpenXDataspeakerColumn Storage for the AI era
as Datadog

The past few years have brought a Cambrian explosion of new columnar formats challenging Parquet. Each promising optimizations for modern workloads.

Video
Apr 16, 2026Data Engineering Open Forum 2026Data Engineering Open ForumspeakerColumn storage for the AI era
as Datadog
Video
Apr 8, 2026Iceberg Summit 2026Iceberg SummitkeynoteColumn Storage for the AI Era
as Apache Parquet (PMC)
The past few years have brought a Cambrian explosion of new columnar formats challenging Parquet, Arrow, and Iceberg: Lance, Fastlanes, Nimble, Vortex, AnyBlox,…Show less

The past few years have brought a Cambrian explosion of new columnar formats challenging Parquet, Arrow, and Iceberg: Lance, Fastlanes, Nimble, Vortex, AnyBlox, F3. Each promises optimizations for modern workloads, but proliferation risks fragmenting the industry.

Video
Nov 17, 2025AI By the Bay 2025AI By the BayspeakerThe advent of the open data lake
as Datadog
Video
Oct 7, 2025Airflow Summit 2025Airflow SummittalkSimplifying Data Lineage: How OpenLineage Empowers Airflow and Beyond
as Datadog

OpenLineage has simplified collecting lineage metadata across the data ecosystem by standardizing its representation in an extensible model.

SlidesVideo
Oct 7, 2025Airflow Summit 2025Airflow SummittalkWhy Datadog Chose Airflow 3: Multi-Tenancy, Observability, and the Future of Event-Driven Workflows
as Datadog
Datadog is a world-class data platform ingesting more than a 100 trillion events a day, providing real-time insights. Before Airflow’s prominence, we built…Show less

Datadog is a world-class data platform ingesting more than a 100 trillion events a day, providing real-time insights. Before Airflow’s prominence, we built batch processing on Luigi, Spotify’s open-source orchestrator.

Video
Sep 11, 2025Community Over Code North America 2025Community Over Code (formerly ApacheCon)speakerThe Deconstructed Database and the Advent of the Open Data Lake
as Datadog
Over the past decade, the big data ecosystem has matured and evolved from a melting pot of competing projects into a composable ecosystem organized around a few…Show less

Over the past decade, the big data ecosystem has matured and evolved from a melting pot of competing projects into a composable ecosystem organized around a few open source standards. The components of databases have been commoditized as individual parts that anyone can compose into use-case specific engines.

Apr 22, 2025Data Council 2025Data CounciltalkThe Deconstructed Database and the Advent of the Open Data Lake Warehouse & lakehouse
as Datadog
Apr 8, 2025Iceberg Summit 2025Iceberg SummitspeakerThe Advent of the Open Data Lake
as Datadog
Video
Aug 15, 2024Chill Data Summit On Tour: Bay Area 2024Chill Data SummitkeynoteIceberg and the Deconstructed Database
as Datadog
Mar 26, 2024Data Council Austin 2024Data CounciltalkTen Years of Building Open Source Standards Community & projects
as Datadog
Nov 13, 2023Scale By the Bay 2023AI By the BayspeakerTen years of building open source standards.Video
Sep 19, 2023Airflow Summit 2023Airflow SummittalkNurturing an Open Source Community is Like Tending a Garden
as Astronomer
Nurturing a healthy open source community is hard work and requires discipline. There’s a lot of inherent friction in a distributed community that makes it…Show less

Nurturing a healthy open source community is hard work and requires discipline. There’s a lot of inherent friction in a distributed community that makes it difficult for the many participants to collaborate.

SlidesVideo
Mar 28, 2023Data Council Austin '23Data CounciltalkTen years of building open source standards: From Parquet to Arrow to OpenLineage Community & projects
as Datadog
Mar 1, 2023Subsurface LIVE 2023Subsurface—Untitled
as Astronomer
Jun 12, 2022Berlin Buzzwords 2022Berlin BuzzwordstalkCross-Platform Data Lineage with OpenLineage
as Astronomer

There are more data tools available than ever before, and it's easier to build a pipeline than it's ever been.

Video
Mar 23, 2022Data Council Austin 2022Data CounciltalkData Lineage with Apache Airflow using OpenLineage Data quality & observability
as Datadog
Jul 8, 2021Airflow Summit 2021Airflow SummittalkData Lineage with Apache Airflow using OpenLineage
as Datakin

If you manage a lot of data, and you're attending this summit, you likely rely on Apache Airflow to do a lot of the heavy lifting.

SlidesVideo
Sep 21, 2020Budapest Data Forum 2020Budapest Data+AI ForumspeakerData lineage and observability with Marquez
as Datakin
Jul 29, 2020Subsurface LIVE Summer 2020SubsurfacekeynoteUntitled
as Datakin

Frequent co-speakers

SpeakerShared eventsShared talksLast together
Maxime Beauchemin6—2026
Matt Topol512026
Ryan Blue5—2026
Harel Shein412026
Alex Merced4—2026
Brenna Buuck4—2026
Chang She4—2026
Vikram Koka4—2026
Yufei Gu4—2026
Jarek Potiuk4—2025
Benn Stancil3—2026
Caitlin Colgrove3—2026
Charles Frye3—2026
Danica Fine3—2026
Dipankar Mazumdar3—2026

Speakers with the same name are merged into one entry, so this page may combine more than one person. Affiliations are shown as each conference listed them.