Partners
We are proud to announce partnerships with many companies whose support enables us to bring the world's best speakers to Dublin to share their knowledge with our local Java community.
EVENTS
Since 2007, we have literally held hundreds of events, from evening meetups to weekend coding parties. Bringing developers together is truly magic.
"I've actually attended several DubJUG events and really enjoyed them."
Renan Correa
DubJUG 268 - Tyson Gern & Paolo Brunasti
29 Jul 2026
Join us for DubJUG 268 with Tyson Gern, founder of Colorado's Initial Capacity and former lead of Pivotal Ireland, travelling from Boulder, USA, and Dutch based...
DubJUG 267 - Live at Squarespace Dublin HQ
17 Jun 2026
Our June meetup sees us live, in-person at Squarespace's Dublin HQ! Come join Java senior software expert, Diana Nanuti (former Devoxx UK speaker), along with...
DubJUG 266 - Kadi McKean & Frithjof Hoffmann
26 May 2026
Meet ReversingLabs Kadi McKean and Frithjof Hoffmann for DubJUG 266 on Tuesday 26th May for an intriguing night of software security stories - simple stuff that...
265 - Trash & Rest
06 May 2026
DubJUG 265, our live in-person event presents Professor Ž (aka Željko Kozina!) Hear why Netflix dumped REST in favour of GraphQL and explore how memory manageme...
264 - Java AI Tools at Gong HQ
16 Apr 2026
Our live in-person event, DubJUG 264, was hosted by our partner Gong’s HQ on the evening of April 16th. Check out the full talk details by Gong software engine...
263 - Java Script?! AI WebForms built with LangChain, Quarkus, Java Libraries and some Angular
26 Feb 2026
Our third visitor of 2026 is Belgium Loïc Magnette live in-person on the evening of February 26th. In this double bill, Loïc will show guests how Java is now u...
262 - How we optimized Santa's travels in Java with Timefold
27 Jan 2026
We're back to get 2026 ignited not with a flame, but an explosion. January sees not one, not two, but three Java Champions visiting Dublin as we again join forc...
261 - Effective Pattern Matching in Java plus Bonus Talk
22 Jan 2026
We're back to get 2026 ignited not with a flame, but an explosion. January sees not one, not two, but three Java Champions visiting Dublin as we again join forc...
DubJUG 2512 - DevOps XXL - How to Scale-up in Large Setups with Observability
12 Dec 2025
Join author and Java Champion Dr. Michael Hüttermann on December 12th at our Xmas event live in-person at Techmeetup.space, tcube workspaces.
DubJUG 2510 - Bruno Souza
19 Nov 2025
We're privileged and fortunate to welcome Bruno Souza back to the Dublin Java User Group the evening of November 19th. Bruno is known worldwide helping Java dev...
DubJUG 2509 - Proxy Power: Boosting Java App Performance with Open J Proxy
25 Sep 2025
Join Rogerio Robetti, to learn how Open J proxy can make a real difference in resource management, stability, and scalability of your Java apps, AND Mike Redlic...
DubJUG 258 - Squarespace HQ with Azul's Simon Ritter
17 Jun 2025
We had an amazing event in Squarespace's Dublin HQ with insightful talks from their team lead AJ Rogers and Azul Systems - request video ⤵️
DubJUG 257 - Haoyi Li
22 May 2025
Author and world renowned open source contributor Haoyi Li visited the Dublin Java User group on 22nd May on a rare visit to Dublin. At this event Haoyi discus...
DubJUG 256 - Nicolas Fränkel
10 Apr 2025
On a rare visit to Dublin by Nicolas Fränkel, we learned about OpenTelemetry Tracing, along with a walkthrough of End-to-End Pull Request Testing on Kubernetes....
DubJUG 255 - The Duke Turns 30
13 Mar 2025
We joined Azul Systems FOOJAY and DubJUG on the evening of Thursday 13th March for DubJUG's Watch Party of Duke Turns 30, a celebrating 30 years of Java
DubJUG 254 - In-Person with Simon Brown
27 Feb 2025
We joined on the evening of Thursday 27th February as author of Software Architecture for Developers, and creator of the C4 Software Architecture Model, Simon B...
DubJUG 253 - JChampions Series - In-Person with Elias Nogueira
27 Jan 2025
We joined on the evening of Monday 27th January as Dutch based Brazilian Java Champion, Elias Nogueira delivered two great Java testing talks, one of which was...
DubJUG 252 - JChampions Series - In-Person with Rafael Del Nero
24 Jan 2025
We joined on the evening of Friday 24th January as Java Champion Rafael Del Nero delivered two great Java talks, one of which was streamed worldwide as part of...
DubJUG 251 - JChampions Series - In-Person with Simon Martinelli
23 Jan 2025
We joined on the evening of Thursday 23rd January as Swiss software consultant and Java Champion delivered two great Java talks, one of which was streamed world...
DubJUG November - DDD without the Dogma - live coding with Apache Causeway
26 Nov 2024
We joined on the evening of Tuesday 26th November as UK software consultant and open source committer, Dan Haywood, shared a live coding experience with Apache...
DubJUG November - Java Champion Otavio Santana and Juarez Barbosa Jnr.
08 Nov 2024
We joined on "Friday" evening of 8th November as Java Champion Otavio Santana returns to the Dublin Java User Group along with Juarez Barbosa Junior. ABSTRACTS...
DubJUG October - Steve Poole Came Back!
24 Oct 2024
On the run up to Halloween 2024, Java Champion Steve Poole made a long-awaited return to the Dublin Java User Group to scare the bejesus out of you, the java de...
DubJUG September - Replatforming a High-Throughput Microservice: From Bare Metal to Cloud with Spring WebFlux and Kubernetes
25 Sep 2024
We joined in Integral Ad Sciences new Dublin HQ on the evening of Wednesday 25th September as their Senior Staff Engineer, Samuel Teixeira, presents **Replatfor...
DubJUG with Red Hat's Sergey Beryozkin
27 Aug 2024
This month, we welcomed long-time open source committer Sergey Beryozkin to the Dublin Java User Group. Currently working at Red Hat, Sergey has a deep interest...
DubJUG with Oracle's Juarez Barbosa Junior
25 Jun 2024
It had been several years since we last had the great pleasure of welcoming Juarez Barbosa Junior to the Dublin Java User Group. On that occasion, we welcomed h...
Apache Kafka Night
07 Mar 2024
We welcomed local Brasilian developer Igor De Souza for a night of Kafka fun! ABSTRACTS BELOW ⤵️
Live JChampions with Guest Speaker - Rafael Del Nero
30 Jan 2024
On the evening of Tuesday January 30th we welcomed Dublin based Java Champion Rafael Del Nero to the Dublin Java User Group at TechMeetup.space in the city cent...
DubJUG - Java Champion Kevin Dubois
14 Nov 2023
On the evening of Tuesday November 14th we welcomed Red Hat developer Kevin Dubois to join the Dublin Java User Group at TechMeetup.space in the city centre. A...
DubJUG - Java Champion Gerrit Grunwald
31 Oct 2023
Java Champion and Azul developer, Gerrit Grunwald (aka Hansolo) joined us on the evening of Tuesday October 31st at TechMeetup.space in Dublin city centre.
DubJUG - Java Champion Venkat Subramaniam
23 Oct 2023
On a rare appearance in Ireland Java Champion extraordinaire Venkat Subramanian treated us to a 90 minute deep-dive on Refactoring from Imperative to Functional...
DubJUG - Oracle's Kris Foster
21 Sep 2023
We hope you joined us the evening of Thursday September 21st, as the Dublin Java User Group welcomed Kris Foster LIVE in-person at TechMeetup.space to give you...
DubJUG - Java Champion Bruno Souza
17 Jul 2023
We hope you joined us July 17th, as the Dublin Java User Group welcomed Java Champion Bruno Souza LIVE in-person at TechMeetup.space to share secrets of life be...
March 2023 - Blockchain & AI Talks
22 Mar 2023
This month the Dublin Java User Group welcomed two local Dublin speakers, Shritesh Jamulkar (Blockchain Corda) and Ahmad Albarqawi (Intelligent Java AI) LIVE in...
February 2023 Java Champion Maarten Mulders
28 Feb 2023
We hope you joined us February 28th, as the Dublin Java User Group welcomed Java Champion Maarten Mulders LIVE in-person at TechMeetup.space to present two talk...
Red Hat Developer Eric Deandrea - 90 Minute Deep Dive
01 Feb 2023
On February 1st, the Dublin Java User Group welcomed Red Hat Developer Eric Deandrea LIVE in-person at TechMeetup.space to present 'Quarkus for Spring Developer...
Meet Java Champion Mary Grygleski Live in Dublin or Watch Online
24 Jan 2023
We hope you joined us at TechMeetup.space on January 24th as Java Champion Mary Grygleski flew in from Chicago to show you how to build an efficient streaming d...
5 tips to make Java Apps More Awesome - with Java Champion Rustam Mehmandarov
19 Jan 2023
We hope you joined us on January 19th as the Dublin Java User Group hosted the jChampions Conference Watch Party, finishing with two live talks with Norwegian J...
November 2022 - Maurice Naftalin
23 Nov 2022
We hope you joined us in-person on the evening of Wednesday 23rd November at TechMeetup.Space, Dublin city centre, was multi-award winning Java Rockstar and Jav...
Learn Lambdas, Streams & Collectors with Maurice
23 Nov 2022
Interested in learning about lambdas streams and collectors in depth? These powerful Java features allow you to implement complex operations clearly and concis...
October 2022 - Java Champion Holly Cummins
02 Nov 2022
Java Champion Holly Cummins was joining us in-person on the evening of Wednesday 2nd November at TechMeetup.Space. She presented 'Cloud Chaos and Microservices...
September 2022 - Java Champion Matt Raible
28 Sep 2022
Matt Raible, Java Champion, and Okta Developer advocate was back at the Dublin Java User Group on Wednesday 28th September - we had one almighty in-person deep...
September 2022 - Java Champion Ixchel Ruiz
14 Sep 2022
In September 2022 Java Champion Ixchel Ruiz joined us from Switzerland to present two outstanding talks, 'DevOps for Java Developers', and 'Framework Agnostic R...
August 2022 - IBM's Grace Jansen
24 Aug 2022
IBM's Developer Advocate and Java Champion, Grace Jansen visited the Dublin Java User Group to give 'hands-on' help with open-source technologies and tools (inc...
June 2022 - Java Champion Simon Ritter
29 Jun 2022
The midsummer of June 2022 saw Java Champion Simon Ritter join us in Dublin, presenting two fabulous sessions; The Art of Java Language Pattern Matching, and Ja...
April 2022 - JavaOne Rockstar, Steve Poole
28 Apr 2022
On Thursday 28th April 2022, the Dublin Java User Group hosted Security Champion and JavaOne Rockstar Steve Poole at TechMeetup.Space in tcube, No.1 O'Connell S...
March 2022 - Java Champion Ivar Grimstad
31 Mar 2022
The Dublin Java User Group hosted Java Champion and Jakarta EE Developer Advocate at Eclipse Foundation, Ivar Grimstad, on Thursday 31st March at TechMeetup.Spa...
January 2022 - jChampions Conference Watch Party
20 Jan 2022
The Dublin Java User Group hosted a WATCH PARTY of the jChampions Conference 2022 on the afternoons and evenings of Thursday 20th, Friday 21st, Monday 24th, and...
December 2021 - Barry Evans
21 Dec 2021
Local Java developer and DubJUG Co-Lead, Barry Evans, presented DubJUG’s first in-person event (since March 2020) on the evening of December 21st. **REGISTRATI...
September 2021 - Microsoft's Bruno Borges
30 Sep 2021
Java Champion Bruno Borges visited the Oracle Dublin Java User Group in September. Bruno explained why Microsoft acknowledges and supports the adoption of custo...
Java25 - Celebrating Java's 25th Anniversary
27 Aug 2020
Java celebrated its 25th anniversary that year, and the Dublin Java User Group marked the occasion with a day-long mini-conf, #Java25, on Thursday 27th August i...
April 2020 - John Ferguson Smart
21 Apr 2020
Test expert John Ferguson Smart visited DubJUG in April — details were shared ahead of the event. **REGISTRATION NOTES** The Dublin Java User Group events are...
March 2020 - DeepCodesAI's Frank Fischer
10 Mar 2020
Frank Fischer, head of Developer Relations at DeepCode, the Zurich-based company that uses AI to identify bugs before they happen, came to present at the Dublin...
Dec 2019 - Java Champion Otavio Santana
04 Dec 2019
Brazilian Java Champion and Duke Award Winner, Otavio Santana visited the Oracle Dublin Java User Group in December. Subscribers were notified when the talks we...
Nov 2019 - Testing Java Microservices with Andy Gumbrecht
06 Nov 2019
Co-author of the highly acclaimed *Testing Java Microservices*, Andy Gumbrecht visited the Oracle Dublin Java User Group in November. Focusing on testing, atten...
Oct 2019 - Quarkus & Revisiting Effective Java in 2019
04 Nov 2019
We have another Java Champion visiting us in October. Edson Yanaga is Director of Developer Experience for Red Hat. In this double bill, Yanaga, as he is affec...
Oct 2019 - Micronaut Framework with Ryszard Perkowski
08 Oct 2019
“For our first event of October, Polish Java developer Ryszard Perkowski, aka Rick, visited the Oracle Dublin Java User Group for the first time. He presented n...
Sept 2019 - Hazelcast Riaz Mohammed
18 Sep 2019
\*\*“Hazelcast’s Riaz Mohammed made his return to the Oracle Dublin Java User Group to walk attendees through how to set up an end-to-end enterprise-grade platf...
Sept 2019 - Java Champion Matt Raible
10 Sep 2019
Java Champion and author of *The JHipster Mini-Book* and *Spring Live*, Matt Raible, returned to share his expert knowledge — delivering an amazing array of inf...
July 2019 - Microprofile and Istio with Java Champion Emily Jiang
31 Jul 2019
We warmly welcomed Java Champion Emily Jiang to the Oracle Dublin Java User Group on Wednesday 31st July. Emily, who works in IBM’s Hursley Lab, is a regular sp...
July 2019 - Oleg Selajev - GraalVM for Java Developers
16 Jul 2019
Lead developer advocate at Oracle Labs and Java Champion, Oleg Selajev, took a hop from his native Estonia for a tour of Ireland in July. Oleg explained GraalVM...
June 2019 - Lightweight Microservices with Microprofile and Raspberry PIs
19 Jun 2019
Our June event saw Tomitribe’s Director of Engineering, Jean-Louis Monteiro, join us at the Oracle Dublin Java User Group to share his knowledge of Eclipse Micr...
May 2019 - Open Source Identity and Access Management with Keycloak
28 May 2019
The second May event of the Oracle Dublin Java User Group saw Thomas Darimont, fellow at one of Europe’s best-known software companies, Codecentric AG, come to...
May 2019 - Infinite Streams, Hot Fluxes, Live Queries and Tailable Cursor Brian Matthews
02 May 2019
Brian Matthews of Búraló Technologies returned to the Oracle Dublin Java User Group on Thursday 2nd May. At the time, he was consulting at Synchronoss Technolog...
April 2019 - Write Now, Run Anytime with Neil C Smith & Gherkin with John Ferguson Smart
10 Apr 2019
A man known the world over for live-coding lambdas in venues to make breakbeat music, PraxisLive’s Neil C Smith, came to the Oracle Dublin Java User Group on We...
March 2019 - Java with Stephen Chin
21 Mar 2019
Our fifth event of 2019 saw Director of the Oracle Groundbreakers Team, global keynote speaker, and Java Rockstar Stephen Chin come to the Oracle Dublin Java Us...
March 2019 - Mark Reinhold & Brian Goetz
06 Mar 2019
Our fourth event of 2019 saw Oracle’s keynote speakers Mark Reinhold and Brian Goetz make a journey to the Oracle Dublin Java User Group on Wednesday 6th March....
February 2019 - Serverless Java Challenges & Project Helidon with David Delabassee
06 Feb 2019
Our third event of 2019 saw Oracle’s Serverless Developer Relations teamster David Delabassee return to the Dublin Java User Group on Wednesday 6th February. Th...
January 2019 - Java Features & Modularity with Sander Mak
24 Jan 2019
Our second event of 2019 saw consultant Sander Mak visit us from Holland to talk to us about Java on 24th January. The full talk abstracts were shared below. Th...
January 2019 - The Oracle Blockchain Cloud Service / Juarez Barbosa Jr
22 Jan 2019
Our first evening event of 2019 sees Oracle Developer Advocate Juarez Barbosa Junior talk to us on the Oracle Blockchain, 22nd January. Check out the full tal...
Java 11 HTTP Client / Java 9 Platform Module System (JPMS)
20 Dec 2018
\*\*“On 20th December 2018, we went totally Java. The talks were presented by Oracle’s Chris Hegarty and Workday engineer and DubJUG member Anton Balaniuc. The...
Eclipse Collections Kata - Barry Evans
13 Dec 2018
On 13th December 2018, DubJUG co-lead Barry Evans presented the Eclipse Collections Kata workshop for members of the Oracle Dublin Java User Group. The full ta...
Benjamin Nothdurft
15 Nov 2018
On 15th November 2018, we welcomed Benjamin Nothdurft to the Oracle Dublin Java User Group. Benjamin was working for Codecentric at the time, and had formerly...
Oracle IOT Workshop
30 Oct 2018
On 30th October 2018, we welcomed Tim Graves to the Oracle Dublin Java User Group. Tim worked on architecting cloud-native solutions, including the use of the O...
elastic Guys Philipp Krenn and David Pilato
11 Oct 2018
For October’s Oracle Dublin Java User Group event, we were privileged to welcome Elastic guys Philipp Krenn and David Pilato, who showed how Elastic can enhance...
Pivotal+Microsoft JUG Tour Europe 2018
08 Oct 2018
We were privileged to host the Irish leg of the Pivotal+Microsoft JUG Tour Europe 2018. This event took place on 8th October 2018 at Dogpatch Labs — doors open...
Venkat
22 Sep 2018
On 22nd September 2018, we were incredibly privileged to welcome Dr. Venkat Subramaniam to Dublin and to the Dublin Java User Group again. The full talk abstra...
Scott Sosna's Visualising Open Data with NEO4J
13 Sep 2018
For September’s DubJUG event, we were privileged to welcome Scott Sosna, who works at Dell EMS Greater Minneapolis and also served on the Content Review Committ...
Java Champion Matt Raible
12 Sep 2018
It had been over ten years since we first met Java Champion and author of *The JHipster Mini-Book* and *Spring Live*, Matt Raible, and we were delighted and pri...
Java Rockstar & Java Champion Sebastian Daschner
09 Aug 2018
For our first DubJUG August event, we were privileged to welcome from Germany Java Champion, Java Rockstar, and Oracle Developer Champion Sebastian Daschner, wh...
Java - Containers and Serverless
26 Jul 2018
For the last DubJUG event in July, we welcomed Matthew Gilliard, who works at Oracle UK. Matthew shared his expert knowledge around containers and serverless....
Docker Workshop with Barry Evans
19 Jul 2018
Due to demand and a 'sold-out' workshop in June, DubJUG co-lead Barry Evans is giving you the chance to attend his highly interactive hands-on workshop Docker f...
Building Reactive Microservices with Spring Boot 2.0
05 Jul 2018
For the DubJUG May event, we welcomed back Brian Matthews, long-term DubJUG member and now JUG leader in Rostov-on-Don, Russia, who presented on building reacti...
Live Coding with Spring Music: Top 5 Ways to Deploy Java to the Cloud
27 Jun 2018
For the DubJUG June event, we welcomed back Brian Benz, a Microsoft Advocate on Java technologies. This presentation built upon his highly acclaimed talk at Dub...
Cache Abstraction with Hazelcast
13 Jun 2018
For our second DubJUG event in June, we welcomed Riaz Mohammed from Hazelcast, the leading in-memory data management company, who discussed Hazelcast’s integrat...
Docker Workshop with Barry Evans
07 Jun 2018
On the evening of 7th June, DubJUG co-lead Barry Evans ran a highly interactive hands-on workshop giving a brief introduction to using Docker for Java Developer...
vJUG - Jenkins X with James Strachan / Java 8 Streams with Anton Balaniuc
05 Jun 2018
Our first DubJUG in June saw a ‘tune-in’ to vJUG’s online meetup with James Strachan, where he covered Jenkins X, followed by a presentation on Java 8 Streams b...
Building Reactive Microservices with Spring Boot 2.0
24 May 2018
For the DubJUG May event, we welcomed back Brian Matthews, long-term DubJUG member and now JUG leader in Rostov-on-Don, Russia, who presented on building reacti...
Serverless Deep Dive with Bert Ertman
24 Apr 2018
Our April event welcomed fellow and Director of Technology Outreach at Luminis, Bert Ertman. A frequent speaker on Java, cloud, and software architecture all ov...
vJUG - A Craftsman’s Guide to Designing a Clean Architecture
19 Apr 2018
We welcomed a Virtual Java User Group screening at the Dublin Java User Group. ##Marcus Biel # **A Craftsman’s Guide to Designing a Clean Architecture** ##Do...
Starting out with JUnit 5
11 Apr 2018
. On the evening of 11th April, DubJUG co-lead Barry Evans ran a workshop built upon a session he attended at JavaOne. Barry presented *Starting Out with JUnit...
Class Loaders, Spring and Java with Simon Maple
28 Mar 2018
Our March event was special! We hosted Java Champion and JavaOne Rockstar Simon Maple, Virtual JUG founder, London Java Community co-leader, RebelLabs author, a...
Microservices in Action at the Dutch National Police & Vert.x
22 Feb 2018
For our second DubJUG event of 2018, we were very honoured to have Java Champion, JavaOne Rockstar, and leader of the NLJUG, Bert Jan Schrijver, come to Dublin...
Java EE 7 Meets Java 8 / Clustering MicroProfile Application using CDI and JCache
17 Jan 2018
With Java 8 EE taking way longer to release than first expected, it seemed like Java 9 EE could have been some time off, and since there were many companies in...
Java Challenges - An Interactive Quiz Testing You!
13 Dec 2017
Our last event of 2017 saw Barry Evans and Rafael Chinelato Del Nero present *10 Java Challenges*, an interactive Java quiz that stretched attendees’ grey matte...
Class Loaders, Spring and Java with Simon Maple
06 Dec 2017
Our March event was special! We hosted Java Champion and JavaOne Rockstar Simon Maple, founder of the Virtual JUG, co-leader of the London Java Community, Rebel...
Java 9 and the Eclipse Collection with Nikhil Nanivadekar
28 Nov 2017
Towards the end of November, we hosted the lead of the Eclipse Collections project, Nikhil Nanivadekar, as he whistle-stopped around Europe and beyond. Nikhil,...
Featured People
Meet the practitioners and experts who share real-world JVM knowledge with the DubJUG community.
What is DubJUG?
The Dublin Java User Group (DubJUG) is a community of software developers working with JVM languages. Proudly supported by our many partners, our events are designed to bridge the Java knowledge gap, helping our community of developers upskill with practical workplace skills, and at the same time local businesses to access stronger team members with the know-how to get engineering problems solved.
Our monthly events offer insight and best practice into real-world technology use delivered by world renowned Java experts - the ones you'd typically only see at major international conferences. DubJUG also fosters local networking among Java professionals.
Announcements
To read the most up-to-date announcements that we release on the Java ecosystem; technology, events, companies, jobs and careers, and community initiatives, we encourage you to follow the official DubJUG accounts on social media.
Contacts
Get In Touch
Oracle Dublin Java User Group
The Oracle Dublin Java User Group hosts events at various locations throughout the city.
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