This edition has endedNext: JCON EUROPE 2026May 19–22, 2026 · Cologne
DevOps

JCON EUROPE 2025

This edition has ended

JCON EUROPE 2025 ran May 13–16, 2025 at Cinedom multiplex cinema in Cologne, Germany. It is a DevOps conference. ConferenceGrid lists 37 speakers and 23 sponsors. The next edition, JCON EUROPE 2026, is May 19–22, 2026 in Cologne.

Last verified May 6, 2026

JCON EUROPE 2025 is the premier in-person Java community conference in Germany, organized by the Java User Group Oberpfalz with JAVAPRO Magazine. The event provides a unique immersive experience for Java developers, featuring live coding on giant movie screens, hands-on workshops, and sessions covering core Java technologies. The 10th edition shines a spotli…

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37Speakers
23Sponsors
0Sessions
46Companies · in total

Speakers

Programmed at JCON, in alphabetical order.

Alina Yurenko
Developer Advocate for GraalVM at Oracle Labs · Oracle Labs
Ana Maria Mihalceanu
Java Champion Alumni, Certified Architect
Andres Almiray
Seasoned Sourceror
Brian Demers
Developer Advocate at Gradle · Gradle
Brian Vermeer
Java Champion | Staff Developer Advocate @ Snyk · Snyk
Carola Lilienthal
Managing Director at Workplace Solutions · Workplace Solutions
Cay Horstmann
Author of Core Java, Scala for the Impatient, and many other books.
Emily Jiang
Lead development architect for MicroProfile and CDI at IBM · IBM
Florian Habermann
CTO & Co-Founder · MicroStream
Gerrit Grunwald
Senior Developer Advocate at Azul Systems · Azul Systems
Grace Jansen
Developer Advocate at IBM · IBM
Jonathan Vila
Developer Advocate at Sonar · Sonar
Karl Heinz Marbaise
Apache Maven PMC Chair
Kevin Wittek
Testcontainers Maintainer and OSS Engineering Manager at Docker · Docker
Kito Mann
Principal Consultant at Virtua, Inc. · Virtua, Inc.
Lize Raes
Software Engineer at LangChain4j · LangChain4j
Marc Philipp
JUnit team lead
Marcus Hellberg
VP of Developer Relations at Vaadin · Vaadin
Marit van Dijk
Software Developer | Java Champion | Developer Advocate at JetBrains · JetBrains
Mark Stoodley
Chief Architect for Java at IBM · IBM
Markus Kett
JAVAPRO Magazin Editor in Chief, CEO of MicroStream · JAVAPRO Magazin / MicroStream
Martin Lippert
Spring Tools Lead & Sustainability Ambassador · Broadcom

Sponsors

The companies behind the program. Tiers as disclosed.

adesso
Agile Unicorn
BayStartUP
Breuninger Digital
DEVK Versicherungen
GEBIT Solutions
GermanTechJobs
Glorium Technologies
HDI
Hyand Group
IBM
ITTECH Jobcast
JAVAPRO
Java User Group Oberpfalz
Karakun
MicroStream
Moderne
Oracle
Oracle Database
RapidClipse X
Sessionize
Vaadin
XDEV Software GmbH

Quick answers

When is JCON EUROPE 2025?
JCON EUROPE 2025 ran May 13–16, 2025 at Cinedom multiplex cinema in Cologne, Germany. The next edition, JCON EUROPE 2026, is May 19–22, 2026 in Cologne.
Where is JCON EUROPE 2025 held?
JCON EUROPE 2025 was held at Cinedom multiplex cinema in Cologne, Germany.
Who is speaking at JCON EUROPE 2025?
ConferenceGrid lists 37 speakers, including Alina Yurenko (Developer Advocate for GraalVM at Oracle Labs, Oracle Labs), Ana Maria Mihalceanu (Java Champion Alumni, Certified Architect) and Andres Almiray (Seasoned Sourceror).
Who sponsors JCON EUROPE 2025?
ConferenceGrid lists 23 sponsors, including adesso, Agile Unicorn, BayStartUP, Breuninger Digital and DEVK Versicherungen.
Company intelligence

What does it mean when 46 companies show up, and 5 bet on three roles at once?

46 companies. five are betting more than once.

The numbers below are derived from the speakers, sponsors, and exhibitors on this page, cross-referenced into one ledger. They are the only thing here that 10times.com cannot tell you.

Who's in the room
5All threespeak · spons · exh
18Sponsoringsponsor only
23Speakingspeaker only

In all three roles

IBM·MicroStream·Oracle·Vaadin·XDEV Software GmbH

Speakers by seniority

30% of the speakers carry senior titles: C-suite, Founder, VP, or Director-level.

  • C-suite411%
  • Founder / Owner13%
  • VP-level13%
  • Director / Head of514%
  • Manager / Lead822%
  • Engineer · IC1438%
  • Other roles411%

Of 37 speakers · classified by free-text title

Most-represented companies
#CompanyRolesSpeakers
1IBMSponsor3
2MicroStreamSponsor1
3OracleSponsor1
4VaadinSponsor1
5XDEV Software GmbHSponsor1
6adessoSponsor-
7Agile UnicornSponsor-
8BayStartUPSponsor-
9Breuninger DigitalSponsor-
10DEVK VersicherungenSponsor-
11GEBIT SolutionsSponsor-
12German Tech JobsSponsor-
13Glorium TechnologiesSponsor-
14HDISponsor-
Sponsors by tier
unspecified23
100% of 23
At peer events but not here

These companies sponsored two or more peer events recently, but aren't on this program. For an organizer, that's a list of warm prospects.

Related events · by shared sponsors
ConferenceDateCityShared sponsors
JCON EUROPE 2027April 26, 2027Cologne5
Open Source Monitoring Conference 2026November 17, 2026Nuremberg4
Celosphere 2026December 1, 2026Munich3
IT-Tage 2026December 7, 2026Frankfurt am Main3
The Enterprise AI Builders Conference San Francisco 2026November 5, 2026San Francisco2
Open Source SecurityCon 2026November 9, 2026Salt Lake City2

In the same series

Prior and forthcoming editions