CodeLab

A Java User Group (JUG), hosting hands-on workshops across the Netherlands. Learn by doing in an interactive and inspiring environment.

[TuxCare @TuxCare_]

Voxxed Days Amsterdam 2026 ✅

We had a great time meeting people from the community, chatting open source security, and seeing TuxCare's Chris DeMars take the stage for multiple talks during the event.

Missed us at #vdams26? See where we’re headed next:
https://t.co/99aPSkHwhK

[Аlina Yurenko 🇺🇦 @alina_yurenko]

Last week I was at @VoxxedAmsterdam.

I had a great time, and want try something new — share my conference impressions in a blog post, following @Ivar_Grimstad's tradition :)

Check my recap here: https://t.co/R0YyLl6HlX

#vdams26 #voxxed

[Johan Hutting @JohanHutting]

Interested in performant modern Java code using records and immutable behaviour? 🤔🚀

My 15 minute lightning talk at last week's @VoxxedAmsterdam is now available on the Devoxx channel: https://t.co/SZH34sgYm6

[Аlina Yurenko 🇺🇦 @alina_yurenko]

The cost of doing a lot of demos is that in all previews you just look intensely staring at the screen 😄
My Voxxed Days Amsterdam talk is up, enjoy! https://t.co/3Bjducxxx9

[Voxxed Days Amsterdam @VoxxedAmsterdam]

Missed a session at Voxxed Days Amsterdam?
Or want to revisit a talk that stood out? 👀

The videos are now live 🎥

From Java and Kotlin to architecture, AI, and modern software development, you can now catch up on the sessions you missed or rewatch the ones worth sharing with your team.

🔎 Browse the schedule and open your favorite session here:
https://t.co/flS6pNO5eF

▶️ Prefer to watch everything in one place?
You can also find the full playlist here:
https://t.co/JYxr6nZeYC

Enjoy 😎🤩🥳

Photo of @iuliaferoli, made by our amazing photographer @dDoutsiopoulos

#vdams26 #VoxxedDaysAmsterdam #Java #Kotlin #AI

[Voxxed Days Amsterdam @VoxxedAmsterdam]

From spaghetti code to quality software 🍝

It’s one of the challenges many of us engineers face. How do we move from messy, silly code to systems that actually work in production?

At Voxxed Days Amsterdam, these speakers share lessons on building and maintaining quality software:

🎤 Ines Panker - Why smart developers write silly code
🎤 Saman Nourkhalaj - Building a legacy: The art of crafting maintainable systems
🎤 @Susivic - RAG in the wild: real-world lessons from modernizing legacy systems
🎤 Mark Dirksma & Marthijs Berfelo - Modernising the Energy Transition: How to build a Cloud-Native, Non-Blocking Registry

https://t.co/0s39eCF12I

#vdams26 #java #lunch

[Voxxed Days Amsterdam @VoxxedAmsterdam]

Voxxed Days Amsterdam is leveling up! 🔥

We’ve unlocked a higher scenario and invited (14) more speakers, and we’re proud of that.

🎤 Amazing speakers incoming
We’ve invited experts from across the international Java and tech community, and confirmations are rolling in fast.

Keep an eye on the program, new speakers are being added!

📅 Start planning your day, the schedule is filling up
With more speakers joining, the two‑day program is expanding every week:
https://t.co/0s39eCF12I

#vdams26 #Java

[Voxxed Days Amsterdam @VoxxedAmsterdam]

🎥 @graalvm 25: what’s new?

The latest GraalVM release brings big improvements in migration, performance, and developer experience.

In this session from @alina_yurenko, we’ll explore what’s new in GraalVM 25, what it enables today, and get a glimpse of what’s coming next.

Curious? Hit play and find out 🚀

Explore the full conference lineup:
https://t.co/nkmc5GR1MM

🎟️ Secure your ticket:
https://t.co/iS1gke7Rz2

#vdams26

[Voxxed Days Amsterdam @VoxxedAmsterdam]

Let’s be honest, around Valentine’s Day, most gifts only get more expensive 😉

Good news: your Voxxed Days Amsterdam ticket doesn’t… at least not right now

💙 Limited offer: Valentines deal!
https://t.co/iS1gke7Rz2

A now-or-never Valentine’s deal ending soon on Monday, 23:59.

[Voxxed Days Amsterdam @VoxxedAmsterdam]

We all love Java (still in a Valentine’s mood 🤣)

But if there’s one thing developers love even more… it’s when things go completely wrong 😈

A memory leak that only shows up on Friday afternoon. Streams that behave almost correctly. AI agents that… well… become a little too creative. A bit of gloating (leedvermaak) is part of the job, right?

At Voxxed Days Amsterdam we’re embracing the fun side of failure, not just to laugh at it, but to learn how it makes us better developers. Expect stories, lessons, and plenty of “we’ve all been there” moments from amazing speakers, including:
- @iam_carpenter, “10 Things I Hate About Java”
- @jborgers, “Avoiding pitfalls with Java streams, concurrency, HTTP requests and more”
- @VictorRentea , “How to trace a Java Memory Leak”
- @prpatel, “How to Write Bad Java Code”
- Adam Michalik, “From greenfield to minefield: How to avoid traps of creeping complexity”
- @aahoogendoorn, “How to survive and thrive as a dev (team) in the exponential age of AI”

The real entertainment starts when it breaks… and the real growth happens when we learn from it.

https://t.co/0s39eCF12I

See you at #VoxxedDaysAmsterdam 💙
#vdam #Java

[Voxxed Days Amsterdam @VoxxedAmsterdam]

Welcome to the Community & Career Track

Where people, growth, and connection take the spotlight!

This track is all about strengthening the human side of tech: communication, teamwork, creativity, and the energy that drives sustainable careers.

Meet the speakers who will inspire this year’s conversations:
🔹 @EliHolderness (The Bennett Institute) — Language Games
🔹 Paulien van Alst (@OpenValue) — Tips and Tricks to Bring the Fun and Passion Back in Your Team!
🔹 @hannotify (@InfoSupportBV) — When Music and Software Come Together

Explore the full conference lineup:
https://t.co/ltMmLbGCVi

🎟️ Secure your ticket before they vanish:
https://t.co/iS1gke7Rz2

This track is shaped by the (50+) community reviewers, the CFP board @KayaWeers, Simone de Gijt, @jlengrand, @MichelSchudel, @Sander_Mak, @iamsoham, @KoTurk77, @wilcoburggraaf
), and track lead @MaritvanDijk77

[Voxxed Days Amsterdam @VoxxedAmsterdam]

Welcome to the DevOps Track! 🔧

With topics ranging from reliability and local workloads to the impact of new EU rules, three experts share what’s next for DevOps:

🔹 Annie Freeman (@Coralogix ) — Un‑observable AI is Un‑trustworthy AI
🔹 Peter Smink (@RockstarsIT) — FrameworkDesktop and IncusOS, a Perfect Combination for Running LLMs Locally
🔹 @atiqamjad (Kaleido Ventures) — Understanding the EU Cyber Resilience Act: What It Means for Open Source

Explore the full conference lineup:
https://t.co/nkmc5GR1MM

🎟�� Secure your ticket:
https://t.co/iS1gke7Rz2

This track is shaped by the (50+) community reviewers, the CFP board (@MaritvanDijk77 , @wilcoburggraaf , @KayaWeers, @jlengrand, @MichelSchudel, @KoTurk77, @Sander_Mak @iamsoham ), and track lead Simone de Gijt.

[Voxxed Days Amsterdam @VoxxedAmsterdam]

Today’s the final day

To grab your Early Bird ticket for Voxxed Days Amsterdam 2026 before the price changes!

If it’s on your radar, now’s the moment.
https://t.co/Yr5eQAMBH3

See you soon?!

#vdams26 #VoxxedDaysAmsterdam

[Voxxed Days Amsterdam @VoxxedAmsterdam]

Say hello to the Mind the Geek Track! 🤓⚡

The place where creativity meets engineering and where the most curious minds come to play with ideas, hardware, code, and everything in between.

This track brings together three passionate speakers and their brilliantly geeky sessions:
🧪 Six and a Half Ridiculous Things to Do with Quarkus — @holly_cummins (@IBM / @QuarkusIO )
🤖 How I Built My Own Intelligent Robot Arm from Scratch — @iuliaferoli (BackToEngineering)
🕹️ Emulating on the JVM — Remco Siemonsma (Remcoder / @KVK_NL )

Explore the full conference schedule here:
https://t.co/nkmc5GR1MM

🎟️ Early bird closing.....
https://t.co/iS1gke7Rz2

This track is shaped by the (50+) community reviewers, the CFP board (@MaritvanDijk77, Simone de Gijt, @jlengrand, @MichelSchudel, @Sander_Mak, @iamsoham, @KoTurk77, @wilcoburggraaf), and track lead @KayaWeers

[Gunter Rotsaert @mydevlprplanet]

Join me @VoxxedAmsterdam for a Byte Size talk 'Testing Architecture Made Simple'. Fifteen minutes packed with examples! See you there! 🚀 🚀 🚀

[Lize Raes @LizeRaes]

Excited to speak at @VoxxedAmsterdam 1-2 April on concrete solutions for building AI-powered enterprise apps. With agentic workflows we're getting into engineering and controlling, beyond 'hopefully this prompt works' 😎

[Voxxed Days Amsterdam @VoxxedAmsterdam]

Say Hello to the Development Practices Track!

AI is reshaping how we code, architect, design, and secure systems and every developer is asking the same question: how do I keep up, stay relevant, and even thrive?

The Development Practices track brings together four sessions that help you navigate this new reality, from AI‑driven teamwork to rethinking authorization, making security enjoyable, and uncovering Java streaming techniques you don’t want to miss:

🔹 How to survive and thrive as a dev (team) in the exponential age of AI — @aahoogendoorn (@ibood)
🔹 Stop Using JSON Web Tokens (JWTs) for Authorization! — Sohan Maheshwar (@authzed)
🔹 Make Cybersecurity Fun — Artem Makarov (@CodeNomads)
🔹 Stream tricks that you don't wanna miss! — @AichaLaafia (Groupe Havana)

Explore the full schedule:
https://t.co/ltMmLbGCVi

🎟️ And grab your early bird ticket before they’re gone:
https://t.co/iS1gke7Rz2

This track is shaped by the (50+) community reviewers, the CFP board (@MaritvanDijk77, Simone de Gijt, @jlengrand, @MichelSchudel, @Sander_Mak, @iamsoham, @KoTurk77, @wilcoburggraaf), and track lead @KayaWeers .

[Voxxed Days Amsterdam @VoxxedAmsterdam]

Last chance: Early Bird tickets end this week!

Prices go up soon, don’t miss your chance to save and secure your spot at Voxxed Days Amsterdam 😉

Get your ticket → https://t.co/iS1gke7Rz2

👀 Curious what’s coming?
Check the schedule: https://t.co/ltMmLbGCVi

⭐ Last year’s talks were rated 4 out of 5 stars
Watch highlights: https://t.co/2EQtOHpZKk

#vdams26 #VoxxedDaysAmsterdam📷

[Voxxed Days Amsterdam @VoxxedAmsterdam]

Releasing the Data & AI Track!
What happens when developers start building intelligent agents? When AI boosts predictions, accessibility, and even energy awareness?

The Data & AI track dives right in with:
🔹 Building AI Agents on the JVM — @antonarhipov (@jetbrains )
🔹 Integrating AI into Your Java Applications: Spring AI Deep Dive with RAG, Tool Calling & MCP — @christzolov (@Broadcom )
🔹 Accessibility powered by AI — Ramona Domen (@RockstarsIT )
🔹 Can GenAI predict code’s energy use and why should we care? — @wilcoburggraaf (HighTech Innovators)
🔹 Level Up Your LangChain4j Apps for Production — @LizeRaes (@Oracle )
🔹 Agentic Programming, this is how it's done — @JeroenEgelmeers (@sogeti ) 🔹 Building AI Agents with Spring & MCP — @JamesWard & @starbuxman (@Broadcom , @awscloud )

Explore the full schedule:
https://t.co/nkmc5GR1MM

🎟️ And grab your early bird ticket before time runs out: https://t.co/iS1gke7Rz2

The Data & AI track is shaped by the (50+) community reviewers, the CFP board (@MaritvanDijk77 , @wilcoburggraaf, Simone de Gijt, @KayaWeers, @jlengrand , @MichelSchudel , @KoTurk77 , @Sander_Mak ) and track lead @iamsoham.

[Ko Turk @KoTurk77]

Can't wait to present at @devnexus on "Maven's hidden secrets to speed up your build" in early March, it's the best AI and Enterprise Java conference in the USA and you should attend.

Use this code (SPEAK30) to get 30% off the ticket price!
See you there?