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Virtual Java User Group

@virtualjug.bsky.social
814 followers 402 following 134 posts

Hi from VirtualJUG (vJUG), the world's first online-only Java User Group. Join us, and the best Java experts in the community!

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Kim Fletcher @kimfletcher.bsky.social · 23/09/2026
Hi, I'm Kim. I build dev conferences for a living & I've decided to build a new one. I've spent the past 13 years organising dev events & conferences, most recently Devoxx UK. Between co-running the @virtualjug.bsky.social & volunteering at several other community events. Our next project 🧵
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Kim Fletcher @kimfletcher.bsky.social · 15/09/2026
We’ve been hard at work behind the scenes & I’m excited to finally share some fantastic news! We’ve secured a venue, set the date & after much debate, we have a name. 🤩 If you're curious enough to click the link in the comments, you won't have to wait long.
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Kim Fletcher @kimfletcher.bsky.social · 25/08/2026
Not in Amsterdam? Doesn't matter. @virtualjug.bsky.social is partnering with @amsterdamjug.bsky.social to livestream a session addressing the question every dev is asking: Did AI just break software security forever? Thu Aug 27 · 4:00–6:30 PM UTC → luma.com/8pl0y5om
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Virtual Java User Group @virtualjug.bsky.social · 24/08/2026
We are teaming up with the @amsterdamjug.bsky.social for a special live-streamed event exploring one of the biggest questions facing devs today: Did AI Just Break Software Security Forever? Thursday, Aug 27 · 4:00 PM to 6:30 PM UTC Online event luma.com/8pl0y5om
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JavaZone @javazone.bsky.social · 24/08/2026
Games, robots, programming and lots of fun! 🤖🎮 javaBin Kids is happening this Sunday – find an activity and secure a spot today. 👉 kids.java.no/arrange...
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Kim Fletcher @kimfletcher.bsky.social · 03/08/2026
Adoptium Summit is taking place virtually on Sep 29. Explore the breadth & depth of Adoptium tech, bringing together #Java devs, architects, contributors, adopters & orgs for tech talks, best practices, and real-world cases. Register here
bit.ly
Exploring the Breadth and Depth of Adoptium Technologies | The Eclipse Foundation
Adoptium Summit is a half day premier virtual conference.
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Kim Fletcher @kimfletcher.bsky.social · 28/07/2026
I had an absolutely wonderful day with Audrey Neveu, @mseckington.bsky.social, Dan Hardiker & @svenpet.bsky.social! Our kickoff for project codename "KimmiCon" was truly inspiring & we can't wait to share more about this new developer conference coming to London. Stay tuned for more updates!
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Virtual Java User Group @virtualjug.bsky.social · 23/07/2026
"‘Honey, dishwasher’s finished.’ Is this a command telling you to do something, or an event? It’s a passive-aggressive event." - Victor Rentea Software architecture has the exact same problem. Here’s why confusing Commands and Events ruins your systems 🧵👇
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Virtual Java User Group @virtualjug.bsky.social · 15/07/2026
Join us at the London Java Community meetup at Capital One on Wed 22 July from 6pm BST. Speakers: @mseckington.bsky.social - See It, Say It, Sort It: How To Be More Proactive Jack Gough - From Fleeticide To Recovery: When Your Auto-Scaling Policy Becomes Your Worst Enemy Sign up: bit.ly/3TlGBOl
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Virtual Java User Group @virtualjug.bsky.social · 14/07/2026
Adoptium Summit is taking place virtually on Sep 29 Explore the breadth & depth of Adoptium tech, bringing together #Java devs, architects, contributors, adopters & orgs for tech talks, best practices, real-world cases Reg bit.ly/4phudea Talk bit.ly/4bId9IC #AdoptiumSummit26 #EclipseTemurin
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Kim Fletcher @kimfletcher.bsky.social · 09/07/2026
Quick reminder, we have a @virtualjug.bsky.social LIVE session today with Victor Rentea 🗓️ July 9, 2026 | 4 PM UTC 🎟️ Free signup: luma.com/u1ifnmka If you can't make the LIVE session, it will be recorded and available on the vJUG YouTube channel - youtube.com/@virtualJUG
luma.com
Top 10 Event-Driven Architecture Pitfalls by Victor Rentea · Luma
Join us for this fast-paced, high-energy session packed with 10 real-world production war stories from 150+ companies. Instead of dry slides or theoretical…
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IntelliJ IDEA, a JetBrains IDE @intellijidea.com · 06/07/2026
Planning your conference schedule for September? IntelliJ IDEA Conf 2026 is a free virtual conference featuring speakers from Oracle, Docker, Confluent, Broadcom, AWS, JetBrains, and more. 👉 Register now: jb.gg/t06fej #IntelliJIDEAConf
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Kim Fletcher @kimfletcher.bsky.social · 01/07/2026
Abraham Marín-Pérez, co-author of 'Continuous Delivery in Java', is working on a second edition & wants to ensure it meets developers' needs. Please help him by completing this short survey, which takes about 5-10 minutes - docs.google.com/forms/d/e/1F...
docs.google.com
Continuous Delivery in Java - 2nd edition
Hi, I'm Abraham Marín Pérez, co-author of Continuous Delivery in Java (O'Reilly, 2018). I'm exploring a second edition and want to make sure it reflects what you actually need. This short survey takes...
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Kim Fletcher @kimfletcher.bsky.social · 01/07/2026
If there's a speaker you'd like to hear from, or a session or topic you'd like us to cover, send me a DM on the vJUG Slack - bit.ly/4gPH5WH. If you're interested in giving a session, please reach out on Slack too.
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Join Virtual JUG on Slack
Slack is a new way to communicate with your team. It’s faster, better organized, and more secure than email.
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Kim Fletcher @kimfletcher.bsky.social · 01/07/2026
If you missed any @virtualjug.bsky.social sessions this year, you can catch up on YouTube - youtube.com/@virtualJUG On 9 July, Victor Rentea & @vanessaformicola.bsky.social will join us for: Top 10 Event-Driven Architecture Pitfalls. Be sure to sign up on Luma for full details - luma.com/u1ifnmka
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Anne Currie @annecurrie.bsky.social · 30/06/2026
In this week's episode of tech podcast Asynchronous and Unreliable, @hollycummins.com and I chat about Lightswitch Ops, operational efficiency, security, Cloud Native architectures and the unexpectedly emergent superpower of turning things off and on again
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Virtual Java User Group @virtualjug.bsky.social · 29/06/2026
Abraham is exploring a second edition of Continuous Delivery in Java (O'Reilly, 2018). Help shape the book's content by completing this short survey bit.ly/3T8TFGD.
bit.ly
Continuous Delivery in Java - 2nd edition
Hi, I'm Abraham Marín Pérez, co-author of Continuous Delivery in Java (O'Reilly, 2018). I'm exploring a second edition and want to make sure it reflects what you actually need. This short survey takes...
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Virtual Java User Group @virtualjug.bsky.social · 17/06/2026
What’s better than learning from the best Java experts in the world? Doing it alongside a global community of peers. Join us for the next vJUG live session with Victor Rentea & @vanessaformicola.bsky.social. Who will we see there? 👇 Save your seat: luma.com/u1ifnmka
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Virtual Java User Group @virtualjug.bsky.social · 15/06/2026
Welcome to vJUG, the Virtual Java User Group. We bring top-tier talks on Java and backend engineering directly to your screen, wherever you are in the world. Join us for our upcoming session: Top 10 Event-Driven Architecture Pitfalls by Victor Rentea 👉 RSVP: luma.com/u1ifnmka
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Kim Fletcher @kimfletcher.bsky.social · 12/06/2026
When looking for tech events, hacks, & meetups, where do you go to find them? As the organiser of @virtualjug.bsky.social & launching a new dev event, I want to make sure we show up in the spaces you actually use. Let me know in the comments 👇
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Kim Fletcher @kimfletcher.bsky.social · 11/06/2026
"What could go wrong if I use a message instead of a REST API?" Everything. Duplicate deliveries, out-of-order data, and dual-write drops. Join Java Champion Victor Rentea & @virtualjug.bsky.social for 10 real-world EDA war stories. 🗓️ July 9, 2026 | 4 PM UTC 🎟️ Free signup: luma.com/u1ifnmka
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Kim Fletcher @kimfletcher.bsky.social · 10/06/2026
“Kim, what’s next?” I’m not quite ready to share all the details yet, but Dan Hardiker & I are working on a brand-new developer event. We need your input to help build this: - What’s your favourite part of tech conferences? - What’s your biggest pet peeve? (Be honest; I can take it!) Let us know👇
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Virtual Java User Group @virtualjug.bsky.social · 14/05/2026
We go live in 45min see you there
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Kim Fletcher @kimfletcher.bsky.social · 13/05/2026
Next @virtualjug.bsky.social live: The best way to fetch multiple to-many relationships with #Java by @vladmihalcea.bsky.social Dive into the most efficient strategies for retrieving complex data structures, for scenarios where you need to store the result set in a cache. luma.com/6wrxlqj3
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Virtual Java User Group @virtualjug.bsky.social · 11/05/2026
Don't forget we have a live session happening this week Thursday!
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Kim Fletcher @kimfletcher.bsky.social · 09/05/2026
And just like that @devoxx.uk 2026 has come to an end. Thank you to everyone who helped make this another unforgettable event.
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Virtual Java User Group @virtualjug.bsky.social · 30/04/2026
N+1 queries are a choice, not a destiny. Stop the performance leak! Learn the best way to fetch multi-level hierarchies with @vladmihalcea.bsky.social and Laurentiu Spilca. Register now: luma.com/6wrxlqj3 #Java #Springboot
luma.com
The best way to fetch multiple to-many relationships with Java · Luma
Fetching a multi-level hierarchy from a relational database is a classic performance bottleneck. If you do it wrong, you end up with the dreaded N+1 query…
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CERN Java User Group @cernjug.bsky.social · 29/04/2026
Join the CERN Java User Group for a talk on spec-driven development from the amazing Java Champion, @martinelli.ch . 💬 Lessons from Spec-Driven Development 📅 12 May 2026, 18:00, more details and registration on cern.ch/jug-meetup-5 !
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Kim Fletcher @kimfletcher.bsky.social · 27/04/2026
Are you really going to miss @devoxx.uk? Your next breakthrough idea might find you in the historic hall of the Business Design Centre. Join us and hundreds of the best minds in development for a memorable experience in an iconic London location. Secure your spot now: ➡️ Devoxx.co.uk
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Virtual Java User Group @virtualjug.bsky.social · 26/04/2026
Join us on May 14th for a live session with #Java Champion @vladmihalcea.bsky.social, who delves into the most efficient strategies for retrieving complex data structures—specifically for scenarios where you need to store the result set in a cache like Redis. Sign up: luma.com/6wrxlqj3
luma.com
The best way to fetch multiple to-many relationships with Java · Luma
Fetching a multi-level hierarchy from a relational database is a classic performance bottleneck. If you do it wrong, you end up with the dreaded N+1 query…
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Kim Fletcher @kimfletcher.bsky.social · 23/04/2026
Only 13 days to go… and the excitement is truly building! After months of planning, curating, connecting, dreaming, and a few tears, @devoxx.uk 2026 is almost here! As one of the organisers, I can’t wait to open the doors and welcome all of you to our 13th edition.
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Kim Fletcher @kimfletcher.bsky.social · 20/04/2026
T-16 days until the Business Design Centre transforms into a developer's paradise. 100+ sessions, 2 days, 1 massive community. Are you ready for Devoxx UK? ✅ Ticket - devoxx.co.uk ✅ Devoxx Companion App - m.devoxx.com 6th & 7th May | London
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Devoxx UK @devoxx.uk · 15/04/2026
Newsflash: Devoxx UK is not your average conference! We go above and beyond to create a happy, inclusive vibe so you’ll leave not only having learned a LOT, but with a big smile on your face too. Come and see what we mean. Tickets devoxx.co.uk 6th & 7th May | London
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Devoxx UK @devoxx.uk · 14/04/2026
Tech conferences aren't dead, they’re evolving. According to DevoxxUK’s Mark Hazell, the real value isn't the info (you can Google that); it’s the focused learning, the community & the dev in the next chair who solved your bug. Full ShiftMag interview: bit.ly/3OBf4X9 devoxx.co.uk | 6 & 7 May
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Virtual Java User Group @virtualjug.bsky.social · 13/04/2026
𝐂𝐚𝐥𝐥 𝐅𝐨𝐫 𝐒𝐩𝐞𝐚𝐤𝐞𝐫! Share what you're building, learning, or breaking with Java developers worldwide. We're always looking for practitioners with real-world experience to speak at Virtual JUG. Submit a talk via our CFP and reach a truly global audience. sessionize.com/virtual-java-user-group/
sessionize.com
Virtual Java User Group: Call for Speakers
This is an ongoing Call for Papers.The Virtual Java User Group (vJUG) runs monthly meetups bringing the global Java community together, wherever you a...
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Virtual Java User Group @virtualjug.bsky.social · 10/04/2026
Did you miss the vJUG & LJC connect session with Rod Johnson, the creator of Spring? Don't worry. You can watch the recording now on the vJUG YouTube channel. youtube.com/live/RDNrCz4EiFI?si=aXUHD081b8WFzFN7 Follow us on Luma for future events. luma.com/vjug?k=c
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Virtual Java User Group @virtualjug.bsky.social · 07/04/2026
Is #Java playing catch-up in the AI race? Not if Rod Johnson has anything to say about it. Discover how JVM devs can lead the next wave of innovation with Embabel, a type-safe, enterprise-ready framework for AI Agents. Join us virtually or IRL for this LJC and vJUG collab! luma.com/s9rp5nem
luma.com
Java and Gen AI: JVM Agents With Embabel · Luma
vJUG Connect is teaming up with the London Java Community for a special evening exploring the future of Java in the age of Generative AI. Join us either online…
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Virtual Java User Group @virtualjug.bsky.social · 23/03/2026
Don't forget to subcribe to our YouTube channel to catch up on all our sessiones such as: 𝐅𝐫𝐨𝐦 𝐋𝐞𝐠𝐚𝐜𝐲 𝐭𝐨 𝐂𝐥𝐨𝐮𝐝-𝐍𝐚𝐭𝐢𝐯𝐞: 𝐄𝐟𝐟𝐞𝐜𝐭𝐢𝐯𝐞 & 𝐒𝐜𝐚𝐥𝐚𝐛𝐥𝐞 𝐉𝐚𝐯𝐚 𝐌𝐨𝐝𝐞𝐫𝐧𝐢𝐳𝐚𝐭𝐢𝐨𝐧 𝐰𝐢𝐭𝐡 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧 𝐛𝐲 Emily Jiang - - youtube.com/live/Ox4UrcjhSsk?si=uhRCl_0AGe_UD7pL
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Kim Fletcher @kimfletcher.bsky.social · 23/03/2026
This is @devoxx.uk. Join developers, architects & engineers in London for two action-packed conference days this May. Choose from 100+ live sessions from world-class speakers & expert practitioners. Ready to supercharge your future? Register at devox.co.uk today.
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Virtual Java User Group @virtualjug.bsky.social · 11/03/2026
🔴 We are live 🔴 youtube.com/watch?v=Ox4UrcjhSsk
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Virtual Java User Group @virtualjug.bsky.social · 10/03/2026
Modernizing Java doesn't have to be a manual nightmare. Join us March 11 to learn how to: ✅ Automate the move to Java 21 ✅ Slash cloud costs & boost performance ✅ Transform legacy monoliths without the risk Speaker: @emilyjiang.bsky.social Host: @eliasnogueira.com Link to join: luma.com/ek5kchlx
luma.com
From Legacy to Cloud-Native: Effective and Scalable Java Modernization with Automation · Luma
Modernizing legacy Java doesn’t have to mean risky rewrites or endless manual effort. In our March vJUG session, we’ll explore how automation-driven…
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Elias Nogueira 🇧🇷🇳🇱 @eliasnogueira.com · 09/03/2026
On this Wednesday, March 11, at 7 PM CET, I’ll be hosting a session at @virtualjug.bsky.social, where @emilyjiang.bsky.social will discuss modernizing legacy Java systems with automation and transitioning to cloud-native Java 21 without risky rewrites. Register:
luma.com
From Legacy to Cloud-Native: Effective and Scalable Java Modernization with Automation · Luma
Modernizing legacy Java doesn’t have to mean risky rewrites or endless manual effort. In our March vJUG session, we’ll explore how automation-driven…
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Virtual Java User Group @virtualjug.bsky.social · 02/03/2026
Join @emilyjiang.bsky.social to learn how automation makes the leap to Java 21 faster, safer & way less painful. ✅ Real-world success stories ✅ Cloud-native transformation ✅ Performance & cost wins 📅 March 11, 2026 🕕 6:00 PM UTC Sign up now: luma.com/ek5kchlx
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Virtual Java User Group @virtualjug.bsky.social · 26/02/2026
𝐂𝐚𝐥𝐥 𝐟𝐨𝐫 𝐒𝐩𝐞𝐚𝐤𝐞𝐫𝐬: We’re accepting submissions for upcoming vJUG sessions. vJUG is a global #Java community focused on practical depth & real engineering conversations. 𝐒𝐮𝐛𝐦𝐢𝐭 𝐡𝐞𝐫𝐞: lnkd.in/eUQBQFk6 Tag someone who should apply 👇
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Virtual Java User Group @virtualjug.bsky.social · 02/03/2026
Join @emilyjiang.bsky.social to learn how automation makes the leap to Java 21 faster, safer & way less painful. ✅ Real-world success stories ✅ Cloud-native transformation ✅ Performance & cost wins 📅 March 11, 2026 🕕 6:00 PM UTC Sign up now: luma.com/ek5kchlx
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Virtual Java User Group @virtualjug.bsky.social · 26/02/2026
𝐂𝐚𝐥𝐥 𝐟𝐨𝐫 𝐒𝐩𝐞𝐚𝐤𝐞𝐫𝐬: We’re accepting submissions for upcoming vJUG sessions. vJUG is a global #Java community focused on practical depth & real engineering conversations. 𝐒𝐮𝐛𝐦𝐢𝐭 𝐡𝐞𝐫𝐞: lnkd.in/eUQBQFk6 Tag someone who should apply 👇
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Virtual Java User Group @virtualjug.bsky.social · 25/02/2026
Stop overlooking gems in the #Java Platform! Catch the replay of Ben Evans explaining why Method Handles are essential for modern Java performance. youtube.com/live/PbKYRYgqS4U Next Up: From Legacy to Cloud-Native with Emily Jiang. Join us on March 11 to master Java modernization! luma.com/ek5kchlx
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Brian Vermeer @brianvermeer.nl · 24/02/2026
Java Conferences with closing CFP in the next 15 days: JJUG CCC 2026 Spring Closes: 1 March 2026 DevBcn Closes: 28 February 2026 Devoxx Poland Closes: 28 February 2026 KCDC Closes: 9 March 2026 If you want to add your conference, please submit it at javaconferences.org
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Kim Fletcher @kimfletcher.bsky.social · 24/02/2026
Just a quick reminder to register on Luma (luma.com/gmkf3hnb) for today's @virtualjug.bsky.social (vJUG) session, Method Handles - An Overlooked Gem in the Java Platform, with Ben Evans. All the details and the watch link will be available there. See you all later
luma.com
Method Handles - An Overlooked Gem in the Java Platform · Luma
Join us and unlock the Power of Method Handles. Is your Java codebase still leaning on the clunky, "ancient" Reflection API for dynamic tasks? It’s time to…
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Virtual Java User Group @virtualjug.bsky.social · 18/02/2026
When a Java Rockstar & the author of Optimising Java talks about performance, you listen We're thrilled to host Ben Evans for a masterclass on Method Handles. Despite being introduced in Java 7, many devs still default to the inferior Reflection API & Ben is here to change that. luma.com/gmkf3hnb
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