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Martin Stefanko

@xstefank.bsky.social
345 followers 99 following 43 posts

Principal SW engineer at RedHat, BrnoJUG leader, MicroProfileIO, QuarkusIO, smallrye_io, WildflyAS, JBoss, author of Quarkus in Action (mng.bz/7vl7)

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Reposted by Martin Stefanko
GOTO Conferences @gotocon.com · 03/02/2026
. @hollycummins.com talks with @xstefank.bsky.social & Jan Martiška about "@quarkus.io in Action" ": why they wrote it, what surprised them, and JVM vs native compilation advice. 🎧 gotopia.tech/podcast
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Martin Stefanko @xstefank.bsky.social · 16/01/2026
!!! LAST CHANCE !!! Only a few hours left to grab Quarkus in Action PDF for FREE from @rhdevelopers.bsky.social! developers.redhat.com/e-books/quar...
developers.redhat.com
Quarkus in Action | Red Hat Developer
Download Quarkus in Action, a practical guide to building resilient and scalable, cloud-native, enterprise Java applications using the Quarkus framework
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Martin Stefanko @xstefank.bsky.social · 22/08/2025
I blogged! This is the longest article I have ever written, so I hope it can bring more eyes to the fantastic @quarkus.io project! The role of Quarkus in the modern Java ecosystem javapro.io/2025/08/22/t... via @javapromagazin #quarkus #java #framework #innovation
javapro.io
The role of Quarkus in the modern Java ecosystem - JAVAPRO International
Since its inception in 2019, Quarkus has gradually grown both in user adoption and innovation. The number of…
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Martin Stefanko @xstefank.bsky.social · 31/07/2025
@manning.com Summer Sale 2025! Thursday, July 31 - Sunday, August 3 Half off all books - all MEAP, eBook, and print books $10 liveProjects/ liveVideos $199.99 Subscriptions Great time to get Quarkus in Action in print! - mng.bz/7vl7
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Martin Stefanko @xstefank.bsky.social · 01/07/2025
For the first time in my life, I'm changing the company I work for. @RedHat -> @IBM. I think this is the best thing that could happen for my career and for @QuarkusIO, which I want to succeed. We are standing strong, continuing our mission. Transformation complete!
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Martin Stefanko @xstefank.bsky.social · 16/06/2025
I'm super happy that I can share that the FREE FULL VERSION of Quarkus in Action continues to be available until January 16, 2026!!! Download and share! developers.redhat.com/e-books/quar... Thanks to Red Hat developer!!!
developers.redhat.com
Quarkus in Action | Red Hat Developer
Download Quarkus in Action, a practical guide to building resilient and scalable, cloud-native, enterprise Java applications using the Quarkus framework
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Martin Stefanko @xstefank.bsky.social · 19/05/2025
So, this is what created the other day: redshift -l $(curl ip-api.com/json\?fields\=lat,lon | jq '. | "\(.lat):\(.lon)"' | sed -e 's/^"//' -e 's/"$//') -t 5600:1000 Your eyes and your sleep can thank me later ;)
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Martin Stefanko @xstefank.bsky.social · 14/04/2025
I had to try it too.
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Martin Stefanko @xstefank.bsky.social · 08/04/2025
Finally, I can explain why you should have four monitors 😀
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Reposted by Martin Stefanko
Quarkus @quarkus.io · 28/03/2025
Read Sergey Beryozkin's blog to see how Quarkus LangChain4j and OIDC can help to create secure agentic Google Gemini AI services buff.ly/OeuclOD
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Reposted by Martin Stefanko
Peter Palaga @ppalaga.bsky.social · 25/03/2025
Lesson on Slovak/Czech plus a little bit of AI and command line programming by @xstefank.bsky.social at #VDZ25
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Martin Stefanko @xstefank.bsky.social · 25/03/2025
@voxxedzurich.bsky.social starts! My session about AI-driven CLIs is after lunch. And I have two signed copies of Quarkus in Action ready to give away! :) #VDZ25
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Martin Stefanko @xstefank.bsky.social · 19/03/2025
Quarkus in Action is now available in liveAudio format! Use the code "laquarkus40" for a 40% discount! www.manning.com/books/quarku...
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Martin Stefanko @xstefank.bsky.social · 13/03/2025
LLMs are probably the worst thing that ever happened to conference abstracts. What is the point of writing a short article for the abstract? We can often see the LLMs' patterns. And I personally reject such proposals. Use it LM to verify/correct, not write everything.
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Martin Stefanko @xstefank.bsky.social · 13/02/2025
Quarkus in Action: Getting started with Quarkus | Red Hat Developer developers.redhat.com/articles/202...
developers.redhat.com
Quarkus in Action: Getting started with Quarkus | Red Hat Developer
Read a sample excerpt from Quarkus in Action, a practical guide to building resilient and scalable, cloud-native Java applications using the Quarkus framework.
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Reposted by Martin Stefanko
LangChain4j @langchain4j.dev · 05/02/2025
#LangChain4j 1.0.0-beta1 is out! 🎉 github.com/langchain4j/...
github.com
Release 1.0.0-beta1 · langchain4j/langchain4j
Announcements We are deprecating our old ChatLanguageModel.generate(...) and StreamingChatLanguageModel.generate(...) APIs in favour of the new ChatLanguageModel.chat(...) and StreamingChatLanguag...
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Martin Stefanko @xstefank.bsky.social · 05/02/2025
K9s is an amazing project. k9scli.io
k9scli.io
K9s - Manage Your Kubernetes Clusters In Style
K9s provides a terminal UI to interact with your Kubernetes clusters. The aim of this project is to make it easier to navigate, observe and manage your Kuber...
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Martin Stefanko @xstefank.bsky.social · 27/01/2025
If you would like to have also the printed version, Quarkus in Action is the Deal of the Day at @manningbooks.bsky.social today! Deal of the Day January 27: Now in print! Save 45% on my book Quarkus in Action, and other selected titles @manningbooks.bsky.social: mng.bz/WrEx
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Martin Stefanko @xstefank.bsky.social · 27/01/2025
I'm extremely happy to announce that the FULL FINAL online version of our "Quarkus in Action" book is now available for free as a compliment of Red Hat Developer! Enjoy learning about the awesome @quarkus.io framework! developers.redhat.com/e-books/quar...
developers.redhat.com
Quarkus in Action | Red Hat Developer
Download Quarkus in Action, a practical guide to building resilient and scalable, cloud-native, enterprise Java applications using the Quarkus framework.
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Martin Stefanko @xstefank.bsky.social · 17/01/2025
With Quarkus in Action now in print, here comes a 45 % discount until January 31!!! Use the code: "pbstefanko" or direct link: mng.bz/7vl7
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Martin Stefanko @xstefank.bsky.social · 13/01/2025
What a feeling! Holding your first book in your hands is just awesome! Quarkus in Action is fresh from print! Thank you, @manningbooks.bsky.social and @quarkus.io! Grab your copy mng.bz/7vl7!
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Martin Stefanko @xstefank.bsky.social · 03/12/2024
Because #java is #metal! 🤘 www.youtube.com/watch?v=yup8...
youtube.com
NANOWAR OF STEEL - HelloWorld.java (Source Code Video) | Napalm Records
YouTube video by Napalm Records
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Reposted by Martin Stefanko
Daniel Oh @danieloh30.bsky.social · 29/11/2024
Quarkus 3.17.2 - Maintenance release quarkus.io/blog/quarkus... via @quarkusio
quarkus.io
Quarkus 3.17.2 - Maintenance release
Quarkus: Supersonic Subatomic Java
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Martin Stefanko @xstefank.bsky.social · 29/11/2024
Quarkus has surpassed the 1,000 contributor milestone! developers.redhat.com/articles/202...
developers.redhat.com
Quarkus has surpassed the 1,000 contributor milestone | Red Hat Developer
Explore the evolution and future of Quarkus, Red Hat’s next-generation Java framework designed to optimize applications for cloud-native environments.
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Reposted by Martin Stefanko
java-champions.bsky.social @java-champions.bsky.social · 14/11/2024
Hello World! #Java developers, this is the official #JavaChampions account on Bluesky. Look for more activity here.
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Reposted by Martin Stefanko
Otavio R. Piske @orpiske.net · 12/11/2024
Cool!!! #AI #FOSS #RedHat www.redhat.com/en/about/pre...
redhat.com
Red Hat Announces Definitive Agreement to Acquire Neural Magic
Red Hat announced that it has signed a definitive agreement to acquire Neural Magic, a pioneer in software and algorithms that accelerate generative AI (gen AI) inference workloads.
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Reposted by Martin Stefanko
Sharat (Shar) Chander - 🟦🌊 @sharatchander.bsky.social · 31/10/2024
#Java peers... Happy #Halloween! Hope your day if filled with sweet treats! Visit dev.java to fill your bag with @Java knowledge and community information! ☕️🎃👻🐈‍⬛💀🍭 #JavaHalloween
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Martin Stefanko @xstefank.bsky.social · 25/10/2024
Deal of the Day October 25: Save 45% on my book Quarkus in Action, and other selected titles at ManningBooks: mng.bz/WrEx
mng.bz
Deal of the Day
Manning is an independent publisher of computer books, videos, and courses.
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Martin Stefanko @xstefank.bsky.social · 22/07/2024
Last week, I moved from the JBoss EAP product sustaining team to the awesome Quarkus team!!! Specifically to the Java Operator SDK project and the associated github.com/quarkiverse/... extension! And yes, I wasn't on the Quarkus team until now :)
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Reposted by Martin Stefanko
Nicolai Parlog @nipafx.dev · 06/06/2024
#Java 23 will be forked today, so features are set in stone! 2 made it to finalization: * default GenZGC * Markdown in JavaDoc String templates are out, a big chunk of `Unsafe` got deprecated for removal, and 8 (!) previews evolved. More on all that in the latest Inside Java Newscast.
youtube.com
All Java 23 Features - Inside Java Newscast #70
Java 23 will be released on September 17th but it's branched today (June 6th 2024) and so its feature set is final. Generational ZGC, Markdown in JavaDoc, de...
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Martin Stefanko @xstefank.bsky.social · 20/05/2024
Join me this week at InfosharePL to learn what potential issues you can find in your apps when you dive head-first into virtual threads!
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Reposted by Martin Stefanko
Commonhaus Foundation @commonhaus.org · 09/04/2024
We’re officially open! 🎉 github.com/commonhaus/f...
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Reposted by Martin Stefanko
Adam Bien @adambien.blog · 31/03/2024
An airhacks.fm podcast conversation with Dimitris Andreadis on "Integrating AI with Java: Quarkus and @Langchain4j" is ready to listen: 👉https://adambien.blog/roller/abien/entry/integrating_ai_with_java_quarkus #java #podcast
airhacks.fm
airhacks.fm podcast
podcast with adam bien
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Martin Stefanko @xstefank.bsky.social · 11/03/2024
I was challenged by @adambien.blog during our interview for Airhack.fm (airhacks.fm/#episode_270) to try to run my first game (end of highschool). I wasn't even able to remember the language I wrote it in. BUT I found it in my old hard drive and its's running through wine! And it's ActionScript :D
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Martin Stefanko @xstefank.bsky.social · 06/03/2024
I'll speak (2 times!) at Warsaw IT Days 2024 on 5. 4. (online) and 6. 4 (on-site) about @QuarkusIO DevJoy and its integration with project Loom. 20% discount code on the purchase of a Standard or PRO ticket. The code is valid until March 22 (23:59).
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Reposted by Martin Stefanko
Trisha Gee @trishagee.bsky.social · 29/02/2024
Does testing slow you down? In my first video for Dave Farley's Continuous Delivery YouTube channel, I talk about the challenges that face developers when it comes to writing automated tests
youtu.be
Testing Is Bad For Developer Productivity
We've all said, "I don't have time for testing". Is forcing tests onto your code hurting your developer productivity? It's more complicated than saying "just...
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Martin Stefanko @xstefank.bsky.social · 29/02/2024
Quarkus in Action is half off today for the @manningbooks.bsky.social Leap Day promotion! Grab your copy for a really great price - mng.bz/7vl7
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Martin Stefanko @xstefank.bsky.social · 04/02/2024
Deal of the Day February 4: Save 45% on my book Quarkus in Action, and other selected titles @manningbooks.bsky.social #quarkus #kubernetes #java: mng.bz/WrEx
mng.bz
Deal of the Day
Manning is an independent publisher of computer books, videos, and courses.
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Martin Stefanko @xstefank.bsky.social · 02/01/2024
Happy New All Day Inbox Reading Everyone!
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Reposted by Martin Stefanko
Maarten Mulders 💙💛 @mthmulders.bsky.social · 28/12/2023
🚀 mcs 0.6.0 has just been (j)released! Check github.com/mthmulders/m... for the details.
github.com
Release Release v0.6.0 · mthmulders/mcs
Changelog 🚀 Features 3e5ff54 Make 'search' the default command, closes #300 🧰 Tasks 807a5cc Releasing version 0.6.0 fbb04af Bump actions/setup-java from 3.13.0 to 4.0.0 (#304), closes #304 f2...
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Martin Stefanko @xstefank.bsky.social · 01/12/2023
Today at 12:00 BRT, 16:00 CET I'm again invited to speak to the awesome community at SOUJava. This time: no slides, just code with Quarkus! See you there: www.youtube.com/watch?v=5jmv...
youtube.com
SouJava Talks: SouJava Talks: Quarkus in Action... in action with Martin Stefanko
SouJava would like to announce that we'll be pleased to have Martin Stefanko (@xstefank) again, but this time, he said: no slides, just code! Join us for the...
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Martin Stefanko @xstefank.bsky.social · 28/11/2023
I'll be speaking at Ya!vaConf on 8. 12.! yavaconf.com/en/ Use the code YAVA23SP20 to get a Standard or VIP ticket with a 20% discount!
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Reposted by Martin Stefanko
Adam Bien @adambien.blog · 26/11/2023
"Promotions, the definition of titles, the importance of MicroProfile and standards, Quarkus and SmallRye "--an airhacks.fm conversion with @xstefank.bsky.social is ready to listen: airhacks.fm#episode_270 #airhacks #podcast #java
airhacks.fm
airhacks.fm podcast
podcast with adam bien
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Martin Stefanko @xstefank.bsky.social · 23/11/2023
Today, Nov 23, at 12 pm BRT, 4 pm CET, 10 am ET, I will present our book Quarkus in Action at SOUJava! I also have 3 100% discount codes! Come and learn about how this book can help you on the learning path with Quarkus! www.meetup.com/soujava/even...
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Reposted by Martin Stefanko
Markus Eisele @myfear.com · 08/11/2023
🎙️ can't miss @holly-cummins.bsky.social , Senior Principal Software Engineer at Red Hat speaking at CloudBuildersUA! Holly will introduce Quarkus and its advanced features, cover native binaries, and much more, including both theory and live demos. bit.ly/47no0D8
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Reposted by Martin Stefanko
Nicolai Parlog @nipafx.dev · 02/11/2023
Remember earlier this week, when Java's stream API didn't have that intermediate operation you needed? It will soon get it. Which operation am I talking about? All of them! Thanks to Gatherers, we can easily implement our own intermediate operations that seamlessly fit into any pipeline.
youtube.com
Better Java Streams with Gatherers
Java's stream API needs more intermediate operations but instead of implementing some of them, Stream::gather, a new meta-operation, allows the JDK and us to...
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Reposted by Martin Stefanko
Adam Bien @adambien.blog · 31/10/2023
"How JProfiler Happened" 👉 airhacks.fm#episode_265 Podcast with @ingokegel.bsky.social #java #podcast
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Martin Stefanko @xstefank.bsky.social · 30/10/2023
Hello (Bluesky) world!
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