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LEGEND
Gray - past event or not going
more events:https://confs.tech/?online=hybrid&topics=java
https://www.javaspecialists.eu/slack/
https://junconf.org/
https://javaconferences.org
/
https://foojay.io/calendar/
https://dev.events/java
https://www.worldconferencealerts.com/
https://java.de/roller/blog/page/Konferenzen
Spanish tech conf: https://github.com/francjp/spanish-events/wiki
Slack Thread H1: Slack Thread H2:
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Green -Adoptium member is attending
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Blue - members and Ef is attending
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Orange - EF is attending
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Yellow - pending to update dates, and CFP
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EventEvent WebsiteEvent Description, attendees, audience, etc.Published at https://adoptium.net/news/Involvement
SP = sponsor
PR = presenting
AT = attending
Who shared it?CFP Submission (Y/N)CFP acceptance(Y/N)Attending / Speaking from AdoptiumAdoptium members sponsoring or BoothDatesLocationCFPCFP DeadlineNotesCommentsDocuments
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JChampions Conference
https://jchampionsconf.com/
The JChampions Conference will run for four days in January 2025 on Thursday, January 23, Friday, January 24, Monday, January 27, and Tuesday, January 28.

Rather than trying to run like a traditional in-person event, each day will feature seven sessions. The first session begins at 9:00 EST, and the last session ends at 16:00 EST. Sessions are scheduled to start every hour. After each session, participants will have time to speak with the presenters
14 million Java developers world wide.
CarmenJan: Thur 23, Fri 24, Mon27, Tues 28Onlinehttps://sessionize.com/jchampions-conference-202531/Oct/2024
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FOSDEM
https://fosdem.org/2025/
Free Java Room https://fosdem.org/2025/schedule/track/free-java/
Security Room: https://fosdem.org/2025/schedule/track/security/
SBOM Room: https://fosdem.org/2025/schedule/track/sbom/
is a free event for software developers to meet, share ideas and collaborate.
Eclipse Fdn is sponsoring
https://fosdem.org/2024/schedule/tracks/
YesCarmenFeb 01-02BrusselsSecurity track CFP: https://lists.fosdem.org/pipermail/fosdem/2024q4/003556.html01/Dec/2024Security Topics:
- Supply chain security: Trust and verifiability
- Software quality tools and best practices
- Cryptography: classic and post-quantum
- Hardware-assisted security improvements
- Security hardening, vulnerability handling and threat detection
- Secure development tools and practices
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JFokushttps://www.jfokus.se/Jfokus is all about developers! Java SE & Java EE, Frontend & Web. Android & Mobile, Continuous Delivery & DevOps, Internet of Things, Cloud & Big Data, Future & Trends, Alt.JVM Languages like Scala, Clojure & many more, Agile development. And super heroes...CarmenFeb 3-5
Stockholm, Sweden + online
30-Sep-2024
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State of Open Sourcehttps://stateofopencon.com/The UK's Open Technology Conference. Open Source Software, Open Hardware, Open Data, Open Standards, & AI Openness.CarmenFeb 4-5Soutbank, Lonodnhttps://stateofopencon.com/cfp/12/03/2024
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FOSS Backstagehttps://24.foss-backstage.de/Community, Management & Compliance in Open Source DevelopmentYEsCarmenMar 10-11Berlinhttps://25.foss-backstage.de/call-for-participation/15-Nov-2025
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FOSS Secutiry Campus
https://foss-security-campus.de/
New FOSS IT SecurityCarmenMar 10-11Berlin15-Nov-2023
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JChateauhttps://junconf.org/
https://www.jchateau.org/
Java Unconference, same organizers as Java User Group Paris.
JChateau® is disorganized by a group of people that have the same passion for technology, especially Java technology
GerdMar 26-30
Loire Valley, France
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Devnexus 2025https://devnexus.com/CarmenCarmenMar 04-06Atlantahttps://sessionize.com/devnexus-2025/15-Sep-2024Nurturing OpenJDK distribution: Eclipse Temurin Success History and Plan by Carmen
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Oracle JavaOnehttps://www.oracle.com/javaone/CarmenMar 17-20
Redwood Shore, CA
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TechFesthttps://t3chfest.es/2025/en/All current Trending tech topics, a gathering by university students for the tech community. 1600+ attendeesCarmenMar 13-14Madridhttps://t3chfest.es/2025/en/call-for-talks24-Nov-2024
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KubeCon & CloudNativeCon EUhttps://events.linuxfoundation.org/kubecon-cloudnativecon-europe/CarmenApr 01-04Londonhttps://events.linuxfoundation.org/kubecon-cloudnativecon-europe/program/cfp/24-Nov-2024https://events.linuxfoundation.org/kubecon-cloudnativecon-europe/program/cfp/#suggested-topics
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Women Techmakers Barcelona https://wtmbarcelona.com/CarmenMar, 23BarcelonaFeb
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JavaLandhttps://www.javaland.eu/en/home/iJUG is organizing this eventCarmeniJUG is organizerApril 01-03Nurburinghttps://www.javaland.eu/en/speakers/09-25-2024Ask for the community booth.
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Commit Confhttps://2025.commit-conf.com/+1000 attendees
25 tech community gathering to discuss Cloud, Web, Machine Learning
85 talks
2 days
CarmenApr 04-05Madridhttps://koliseo.com/commit/commit-conf-2025/sessions11/10/2024
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Devoxx Francehttps://www.devoxx.fr/en/about-us/+4500 attendees per day
3 days
main language french
CarmenApr 16-18Paris?https://devoxxfr2025.cfp.dev/#/login
https://www.devoxx.fr/en/venir-presenter/
01-12-2025
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JAX Mainzhttps://jax.de/mainz-en/Inperson and online 50000+ attendeesCarmenMay 5-9Mainz, Germany11/13/2023
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DevOxx UKhttps://www.devoxx.co.uk/May 07-09London, Englandhttps://devoxxuk24.cfp.dev/#/login1/10/2025CFP opens Nov. 04th
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Geeconhttps://www.geecon.org/Java and JVM based technologies, dynamic languages, enterprise architectures, patterns, distributed computing, software craftsmanship, mobile and much more...May 14-16Krakow
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Maple Leaf Javahttps://2023.jconftoronto.dev/Toronto Java community, java, cloud, JVM languages, Big Data MayTorontoApr
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Jalba - Java Unconferencehttps://junconf.org/
http://jalba.scot/
Java Unconference, 3 days meeting to talk and meet about Java ecosystem, wider technology, questions. and enjoy edinburgh.GerdMay, 16-18
Edinburg, Scotland
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Jonthebeachhttps://jonthebeach.com/Devs, DevOps, Data ScMay 08-10Malaga, Spain
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EsLibre https://eslib.re/2024/Most influential open source event in spain.May, 24-25Valencia, Spainhttps://eslib.re/2024/31-Mar-2024
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Red Hat Summithttps://www.redhat.com/en/summitBlended conference online and inpersonMay 19-22Boston, MA, USAhttps://reg.experiences.redhat.com/flow/redhat/sum25/loginCFP/page/start13-Nov-2024
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Jcon Europe 2025https://2025.europe.jcon.one/ in-person Java community conference in Germany
+1000 participants +100 sessiones, 4 days
CarmenMay 19- 22
Cologne, Germany
https://2025.europe.jcon.one/call-for-papers15-Nov-20241 Workshop-Day, 3 Conference-Days
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Barcelona Cybersecurity Congresshttps://www.barcelonacybersecuritycongress.com/11.000 attendees.
70 session
120 speakers
CarmenMay 13-15Barcelona, Spainhttps://www.barcelonacybersecuritycongress.com/congress/call-for-papers/15-Dec-2024
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JNationhttps://jnation.pt/Programming languages like Java and Javascript, Cloud & Infrastructures, Machine Learning and Artificial Intelligence, or Security and Methodologies.CarmenMay 27-28
Coimbra, Portugal
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Jprimehttps://jprime.io/run by the Bulgarian Java User Group
jPrime is a conference with talks on Java, various languages on the JVM, mobile, web and best practices.
May 28-29Sofia, Bulgariahttps://jprime.io/cfp15-Feb-2024
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JCON Sloveniahttps://makeit.si/Java and OPen SourceCarmenMay 29-31
Portorož, Slovenia
3-Feb-2024
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Community Over Code Europe (former ApacheCon)https://eu.communityovercode.org/Official Global Conference series of the Apache Software Foundation.
3-days event.
Daniel SJune 03-05
Bratislava, Slovakia
Good event for open Source users, Bloomberg was a 2024 sponsor
https://communityovercode.org/wp-content/uploads/2023/12/community-over-code-prospectus-2024.pdf
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DES (dIgital Enterprise Show)https://www.des-show.com/Digital Enterprise Show, Decision makers CarmenJune 10-12Malaga, Spain
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JSail - Java Unconferencehttps://junconf.org/
https://jsail.ijug.eu/
Java Unconference, Netherlands. German speakers.
Hendrik is organizer
iJUG is Organizer
June 23-27
Hemelum, Netherlands
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CloudLandhttps://www.cloudland.org/en/home/German-speakers cloud native communityJan
iJUG is Organizer
June, 18-21Brühl, Germanyhttps://en.shop.doag.org/events/cloudland/cfp/31-Jan-2024
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LeadDev - Londonhttps://leaddev.com/leaddev-london
https://leaddev.com/
Some exhibitors from 2022, adn 2023 sponsors.
1200 attendeses, 38 countries, 45% Eng Mang, 25% aspiring manager.
Carmen11-12 JuneLondon
George will check if he can attend
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LeadinEng - Londonhttps://leaddev.com/leadingeng-londonmore C-level focused: LeadingEng London is for senior leaders – managers of managers in engineering teams – who wish to extend their peer network and develop new skills for their career development. it is a roundatble and there is a elegibility criteria. Carmen13 JuneLondon
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CTO summithttps://ctosummit.geekshubs.com/Attendees 654 pax, 35% CTO, 50% tech seniority >10 years
Topics: Tech, HR management and Business management.
Type of companies: They don't ask for this data, but they have some big corporations and Spanish start-ups.
Requesting community booth, but currently they don't have this availability
Carmen13-14 JunMadridhttps://geekshubscrp.typeform.com/to/DaR6ZS3D?utm_source=ctosummit&utm_medium=web&utm_campaign=2024&typeform-source=ctosummit.geekshubs.com31-Jan-2024
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OpenExpo 2025https://openexpoeurope.com/en/Technological Innovation, Digital Transformation and Open Source for 11 years.
AI discussions.
Cibersecurity
CarmenMay-JuneSpainhttps://docs.google.com/forms/d/e/1FAIpQLSfb-5IIw_y7zxv1JWkuljHLt00zPPwjTp7DllDk2R4HjZCREg/viewform31-Oct-20244500 attendees.
Sucess stories
Cibersecurity
Do not sponsro, It might worth submitting a talk about contirbuting to open source
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Open source summit (north America) - Linux
https://events.linuxfoundation.org/open-source-summit-north-america/open source developers, technologists, and community leaders to collaborate, share information, solve problems, and gain knowledge, furthering open source innovation and ensuring a sustainable open source ecosystem. It is the gathering place for open-source code and community contributorsCarmenjune 23-25
Denver, Colorado
https://events.linuxfoundation.org/open-source-summit-north-america/program/cfp/#overview14-Jan-2024
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DevBCN (former JBCN)https://www.devbcn.com/Former JBCN, they will keep a full track about Java. >1000 attendanceCarmenJuly, 09-10Barcelona, Spainhttps://sessionize.com/devbcn-2024/14-Apr-2024CFP will start Jan, 01st
Eclipse Foundation got a community booth to be shared with Java-related WG
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London Java Community Unconference 2024https://www.ljcunconf.co.uk/CarmenJune, 24
London, England
IBM innovation Studio
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Jibizahttps://jibiza.dev/UnConfCarmenJune 25-27Ibiza, Spain
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Virtual Payara Conferencehttps://www.payara.fish/page/virtual-payara-conference/Secure your Java EcosystemCarmenJune 26-27On line
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JCrete - Java Unconferencehttps://junconf.org/
https://www.jcrete.org/
JCrete® is an invitation-only conference. There is no conference fee, we all pay our own share of the conference facility and you cannot buy a seat (a lot have tried …)4-8 August 2025 (starting evening of 3rd August)
20-24 July 2026 (starting evening of 19th July)
Crete
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Java Forum Stuttgarthttps://www.java-forum-stuttgart.de/Conference with Java as the leitmotif - specialist lectures and exchange of experiences with the community since 1998Carmen
iJUG Memeber JUG Stuttgart is Organizer
July 31Stuttgarthttps://www.java-forum-stuttgart.de/call-for-papers/03/30/2024
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WeAreDevelopers World Congresshttps://www.wearedevelopers.com/world-congressReally big programing-language-independent conferenceHendrikJuly 17-19Berlinhttps://sessionize.com/wearedevelopers-world-congress-202431-Jan-2024EF Ecosystem development team might attend
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JVM Language Summithttps://openjdk.org/projects/mlvm/jvmlangsummit/ConferenceGeorgeAug, 5-7
Santa Clara, California, USA
05/31/2021
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Java Zonehttps://2024.javazone.no/September, 4-5Oslo, Norwayhttps://2024.javazone.no/speakers04/08/2024
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Jcon.dev/ Foojayhttps://2024.jconf.dev/A community Java conference is coming to Dallas!
A three day event diving deep with experts from across the Java and Cloud ecosystem.

5 Tracks • 50+ sessions • 5 workshops
Sept, 24-25Dallas01/31/2024Devloper Outreach
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Open source summit (europe)https://events.linuxfoundation.org/open-source-summit-europe/open source developers, technologists, and community leaders to collaborate, share information, solve problems, and gain knowledge, furthering open source innovation and ensuring a sustainable open source ecosystem. It is the gathering place for open-source code and community contributorsCarmenSep, 16-18Viennahttps://events.linuxfoundation.org/open-source-summit-europe/program/cfp/#overview04/30/2024
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Linux Security Summithttps://events.linuxfoundation.org/open-source-summit-europe/features/co-located-events/#linux-security-summit-europeCarmenSep, 16-17Viennahttps://events.linuxfoundation.org/open-source-summit-europe/program/cfp/#overview04/30/2024
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jconf.devjconf.devSep, 24-26Dallashttps://sessionize.com/jconf-2024/02/01/2024
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Adoptium Summithttps://www.eclipse.org/events/2024/adoptium-summit/half-day Adoptium first online event. September, 10onlinehttps://www.papercall.io/adoptium-summit05/30/2024
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JAX London (hybrid)https://jaxlondon.com/September 30 ‒ October 3, 2024
Expo: Oct 1-2
London or OnlineFeb
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Open Source in Finance Forumhttps://events.linuxfoundation.org/open-source-finance-forum-new-york/CarmenSep 30, Oct 1NYC
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Community Over Code North America (former Apache Con)
Daniel SOct 7-10
Denver, Colorado
Good event for open Source users, Bloomberg was a 2024 sponsor
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Devoxx Belgiumhttps://devoxx.be/Oct 07-11Antwerphttps://dvbe24.cfp.dev/#/login07/12/2024
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Devoxx Moroccohttps://devoxx.ma/JieOct
Taghazout, Agadir, Morocco
May
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Open Community Experience
Open Community for Java
(Former Eclipsecon and Java Community Day)
java.ocxconf.org
https://www.ocxconf.org/
Eclipse Foundation main event.JanOct, 22- 24Mainz, Germanyhttps://www-eur.cvent.com/c/abstracts/193e1fad-7c1d-4be4-8d3e-a086e8d42efe06/10/2024
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All things Openhttps://allthingsopen.org/WE ❤️ OPEN SOURCE
We host open source events and platforms for technologists all over the world
attendees: https://2023.allthingsopen.org/past-attendees/
CarmenOct, 27-29Raliegh, NC, USAhttps://allthingsopen.org/call-for-papers/03/22/2024
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DevConhttps://www.dev-con.ro/DevCon gathers the brighthest minds from the IT community around the world to empower and inspire youGeorgeGeorgeNov, 6-7
Bicharest, Rumania
What’s up at Adoptium?, Nov6 Java Con https://www.dev-con.ro/agenda/8-java-con
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SFSConhttps://www.sfscon.it/A Conference all
about Free Software
CarmenYes, CarmenNov , 08-09Bolzano, Italyhttps://www.sfscon.it/call-4-speakers/30-Jun-2024Carmen Accepted Talk: Nurturing OpenJDK distribution: Eclipse Temurin Success History and Plan
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BuildStuffhttps://www.buildstuff.events/Software Development Conference for Developers, Software Architects, and Tech team leads CarmenNovember, 13-15Vilnius, Lithuaniahttps://www.buildstuff.events/cfp06/20/2024CFP open February
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Jakarta One Livestream Spanishhttps://jakartaone.org/2023/spanish/CarmenNovOnlineAsk Tanja
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J-Fallhttps://jfall.nl/Hosted by NLJUG
1800+ attendees
Nov, 07Ede, NLhttps://sessionize.com/jfall2409/01/2024
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Automation STARhttps://automation.eurostarsoftwaretesting.com/completely focused on test automation and welcomes an engaged and motivated audience of test automation enthusiasts. Oct 09-10ViennaDone, maybe June
Speakers will be announced end of April
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GSAS summithttps://gsas.io/ 3 days summit for software architecture experts. organized by ApiumHub, 650 attendeees, 50% Spain, 50% internatioanl.
34% Soft Arch, 22% Senior Software dev, 18% tech leads, 10% eng mang, 6% It managers, 6%
princ. eng, 2% CTOs.
They don't have space for community booth, but we can be supporter on their website, see comments for supporter requirements
Carmen15-16 OctBarcelonahttps://docs.google.com/forms/d/e/1FAIpQLSf2PeISgsRvU1G3Q0zOAsxlGqO017lpK_Dp0EO-k0xsAYijlg/viewform28-Feb-2024Brochure: https://drive.google.com/file/d/1VzKrxbaHLt7B-e4jYDtukYONdP88jMZZ/view?usp=drive_link
The CFP deadline is March, but they might close the CFP if they have enough speakers and talks.
Supporters requirements.
They offer:
- 20% off on tickets
- Logo on the website
- social media mention

They ask:
- 1 mention in our newsletter.
- 3 social media posts.
- event promotion in our meetups.
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Jcon World 2023https://2023.world.jcon.one/Online CarmenNovOnlineJune
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LeadDev Berlinhttps://leaddev.com/leaddev-berlin
https://leaddev.com/
35% Eng manag, 14% tech lead, 13% eng, 14% Vp, Director, Head, CTOCarmenNovember 4 - 5, 2024Berlinhttps://leaddev.com/conference-speaker14-Apr-2024What to expect: https://leaddev.com/leaddev-berlin/what-to-expect, who shoild come: https://leaddev.com/leaddev-berlin/who-should-come
2023 themes: https://leaddev.com/leaddev-berlin/conference-themes
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W-JAXhttps://jax.de/location-munich/Java Architecture and Software Innovation - GermanNov, 04-08Munchen
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Adoptium Summit Webinar Serieshttps://www.meetup.com/adoptium-summit-series/Carmenmonthly, Starting NovOnlinehttps://forms.gle/Xt4UQoyMeyRFboGk9Monthly
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Jakarta one Livestreamhttps://jakartaone.org/2023/?mc_cid=8151d21daf&mc_eid=8fd7271de2Online CarmenDec 03Onlineask Tanja and Shabnam
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LeadDev Berlinhttps://leaddev.com/leaddev-berlin
https://leaddev.com/
35% Eng manag, 14% tech lead, 13% eng, 14% Vp, Director, Head, CTOCarmenFist week of Dec (04-05 Dec2023)BerlinWhat to expect: https://leaddev.com/leaddev-berlin/what-to-expect, who shoild come: https://leaddev.com/leaddev-berlin/who-should-come
2023 themes: https://leaddev.com/leaddev-berlin/conference-themes
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