HUJAK

JCON GenAI in Hamburg (Nov 4) and Ljubljana (Nov 20)

21.10.2025.

Our friends from JCON, JUG Hamburg, SIOUG, OpenBlend, and JavaPro magazine are hosting interesting GenAI workshops in Hamburg on November 4th and in Ljubljana on November 20th.

The moment for enterprise-grade Generative AI in Java has arrived — and you have the advantage! Almost all major enterprise systems, and the mountains of proprietary data they hold, are built on Java. That makes Java the perfect foundation for high-impact AI projects — but only if you know how to build them right.

JCON GenAI is your high-octane, single-day hands-on workshop series, designed to get you out of theory and into production-ready code. Join leading experts from the Java community and master the tools, architectures, and security foundations needed to drive your company’s AI transformation.

This is a deep-dive, practical masterclass led by first-class speakers, including Adam Bien, Florian Habremann, Sve Ruppert, Steve Poole, Oleg Nenashev, Vishal Shanbhag, Michalis Papdimitrou, A.Mahdy Abdelaziz, Ingo Dueppe, Mahdi Tilab, Vadym Kazulkin, and Brijesh Deo.

You’ll learn how to:

Build and integrate Generative AI systems with enterprise Java.
Apply modern AI architectures, tools, and APIs in real-world contexts.
Understand security, compliance, and data protection for AI in production.
Bridge the gap between Java enterprise systems and LLM-powered applications.

Hamburg, Germany — 4 November 2025
Organized in collaboration with JUG Hamburg
📍 Radisson BLU Hotel Hamburg, Congressplatz 2, 20355 Hamburg

Ljubljana, Slovenia — 20 November 2025
Organized in collaboration with JUG Slovenia and supported by JUG Croatia / HUJAK
📍 M Hotel, Derčeva ulica 4, 1000 Ljubljana

Early Bird is €203.00 + local VAT (Germany 19%, Slovenia 22%)
Regular price: €290.00 + local VAT
Save €87.00 when you register before 30 October 2025 for Hamburg and 13 November 2025 for Ljubljana

Or join both events — Hamburg & Ljubljana — and become part of the Java GenAI movement redefining enterprise AI.

More information at www.genai.jcon.one

Uneseno pod Java, Konferencije

JavaCro’25 Conference (October 12-15, Rovinj) – Call for Speakers is open!

18.03.2025.

Do you have a passion for software development, particularly in Java?
Are you eager to learn from the software industry’s brightest minds?
Do you want to want to talk to other professionals in person?

We have something interesting for you, and it is not far away – look no further than JavaCro’25 – the 14th International Java Conference in Croatia, coming in October!

Join us on October 12-15, 2025, at the breathtaking Island Hotel Istra resort on St. Andrew’s Island (Red Island) near Rovinj, one of the most coveted tourist destinations in this part of Europe. In 3 days we are expecting 400 attendees and 50+ high-quality sessions —and we welcome your contributions! The Call for Speakers is open, and here is a short video of last year’s conference.

Once more, we will be back at the gorgeous Red Island near Rovinj in October, where we’ll practically have the whole island to ourselves. We strongly believe that in-person and face-to-face sharing of knowledge and experiences is the best way to learn and share, and we look forward to seeing you there and joining us. The Call for Speakers is open until May 15th, and you can start sending your session proposals. We are looking for 50 high-quality sessions from exceptional speakers from this part of Europe as well as some world-famous Java speakers. Additionally, if you are into databases, you can extend your stay and visit the HrOUG conference.

We believe that this is an unparalleled opportunity for you and your colleagues to submit a session proposal and showcase your achievements and experience in front of a large professional audience. Tell your story, share your experience, show your results, and promote your product, your company, and yourself in front of many developers, software architects, and project managers, as well as media representatives, potential partners, and clients. As a place of intense social networking, it is a natural way to discuss your projects and trending technologies, as well as seek new partners, clients, and employees.

A gentle reminder – Call for Speakers is open until May 15th!

Additionally, if your company is interested in sponsoring the event, we offer various sponsorship packages that can help your brand gain exposure – don’t miss this exceptional opportunity to showcase your company, projects, and expertise.

This year’s proposed conference tracks and topic categories include:

Core Java
Web & Mobile
Methodologies & Tools
Technologies & Solutions
Trends, Future & Community
Best Practices & Success Stories
Workshops & Training

The conference languages are English (preferred) and Croatian.

The first author of the accepted session gets a free conference pass and, additionally, free accommodation (one night) in the hotel room for each accepted session to be presented at the conference.

HUJAK company members also receive one conference pass free of charge per year and discounts on others. More information on registration, accommodation, and prices will be available in the following months. In the meantime, you can take a look at the beautiful venue. If you have any questions, please feel free to contact us at javacro@hujak.hr.

Be sure to mark your calendars for October 12-15, 2025, for JavaCro’25!
We are eagerly anticipating your session proposals and contributions!
See you in Rovinj!

Uneseno pod Java, JavaCro, Konferencije, Press Tagged with conference, conferences, education, events, news

Konferencija JCON EUROPE 2025, 12.-15.5., Köln

18.03.2025.

U suradnji s partnerom JCON iz Njemačke, udrugom Java User Group Oberpfalz i magazinom JAVAPRO (https://javapro.io/magazin/), svi članovi HUJAK-a za 2025. godinu imaju mogućnost dobiti besplatne ulaznice za konferenciju JCON EUROPE 2025 (https://2025.europe.jcon.one/) koja će se održati 12.-15. svibnja 2025. u Kölnu, a imat će i pristup svim snimkama naknadno.

Da bi ostvarili navedenu pogodnost, koristite direktan link https://2025.europe.jcon.one/tickets i odaberite tip ulaznice „Java User Group Pass“ i te pod Java User Group upišite kod „HUJAK“ koji bi trebao omogućiti besplatnu ulaznicu. Dodatno, možete sudjelovati i na workshopima koji će biti uskoro objavljeni.

JCON EUROPE 2025 is returning to the big cinema screen from May 12th – 15th, 2025! Join us for a top-tier Java conference featuring four parallel tracks, hands-on workshops, and a vibrant international Java community.

📅 Monday, May 12th – Big Workshop Day
📅 Main Conference: May 13th – 15th – Deep-dive sessions, live coding & networking
📅 VIP Event: May 14th – Exclusive gathering with Java experts
🍻 Happy Hour: May 13th – 14th – Unwind and network with fellow developers Why You Should Attend

100+ international speakers sharing their expertise
100+ world-class sessions covering Core Java, APIs, frameworks, cloud & serverless, AI, DevOps & more
8 expert-led workshops + interactive round table
Live coding in a multiplex cinema – the most immersive Java experience
Training, networking & team event – connect, learn, and grow
1:1 meetings with speakers – book a personal Q&A with top experts
A global Java community – Meet speakers from six continents
With 1,000+ participants, JCON EUROPE 2025 is where community and code converge.

We look forward to meeting you at JCON!

Uneseno pod Java

JCON OpenBlend Slovenia 2025 (and MakeIT) conference, May 28-30, Portorož, Slovenia

18.03.2025.

JCON OpenBlend Slovenia 2025 is a professional community conference organized on May 28-30 in Portorož in Slovenia by our friends from Slovenian user groups OpenBlend & SIOUG in cooperation with JCON . Both CON OpenBlend Slovenia 2025 and MakeIT 2025 run at the same time, but JCON conference is a community event with a focus on Java and open-source technologies, while MakeIT conference is centered around Oracle technologies (Cloud, APEX, PL/SQL, Oracle Database, AI, …). There are hands-on labs on May 28th and many conference sessions on May 29th and 30th. Early bird prices are still available, and members of HUJAK are invited with a special discount.

JCON OpenBlend Slovenia 2025 is the premier in-person Java community event in Slovenia. Tracing its roots back to 2008, our conference has consistently brought together top-notch domestic and international speakers, evolving through various locations and identities.

In the ever-changing ICT industry, adaptation is key. 2025 brings a unique opportunity: two powerhouse conferences under one roof. Alongside JCON OpenBlend, dedicated to all things Java, we’ll host MakeIT 2025, focusing on Oracle-related content. It’s a dual dose of tech insights and trends, all in one vibrant location.

Our philosophy remains steadfast: connecting people and fostering a rich exchange of knowledge and experiences. Whether you’re a seasoned professional or a budding enthusiast, JCON OpenBlend Slovenia 2025 is the place to be for insightful learning and invaluable networking.

Uneseno pod Java

JCON OpenBlend Slovenia 2024 conference, May 29-31, Portorož, Slovenia

29.04.2024.

JCON OpenBlend Slovenia 2024 is a Java community conference organized by our friends from Slovenian user groups OpenBlend & SIOUG in cooperation with JCON on May 29-31 in Portorož. Early bird prices are still available, there is a special track on Quarkus and the Oracle-related conference MakeIT 2024 in parallel, and members of HUJAK are invited.

JCON OpenBlend Slovenia 2024 is the premier in-person Java community event in Slovenia. Tracing its roots back to 2008, our conference has consistently brought together top-notch domestic and international speakers, evolving through various locations and identities.

In the ever-changing ICT industry, adaptation is key. This year, we’re reshaping our format to offer a more focused experience, taking you back to the core of what made us a community favourite. Expect a refreshing twist to the usual format!

2024 brings a unique opportunity: two powerhouse conferences under one roof. Alongside JCON OpenBlend, dedicated to all things Java, we’ll host MakeIT 2024, focusing on Oracle-related content. It’s a dual dose of tech insights and trends, all in one vibrant location.

Our philosophy remains steadfast: connecting people and fostering a rich exchange of knowledge and experiences. Whether you’re a seasoned professional or a budding enthusiast, JCON OpenBlend Slovenia 2024 is the place to be for insightful learning and invaluable networking.

Quarkus dedicated tracks on JCON
We are excited to announce that JCON OpenBlend Slovenia 2024 will be hosting over 20 engineers from the core Quarkus development team. They’ll be delivering four workshops and eight sessions. https://makeit.si/quarkus

Uneseno pod Java, Konferencije Tagged with europe, eurovision, ljubljana, slovenia, travel

Konferencija JCON EUROPE 2024, 13.-16.5., Köln

29.04.2024.

U suradnji s partnerom JCON iz Njemačke, udrugom Java User Group Oberpfalz i magazinom JAVAPRO (https://javapro.io/magazin/), svi članovi HUJAK-a za 2024. godinu imaju mogućnost dobiti besplatne ulaznice za konferenciju JCON EUROPE 2024 (https://2024.europe.jcon.one/) koja će se održati 13.-16. lipnja 2024. u Kölnu, a imat će i pristup svim snimkama naknadno.

Da bi ostvarili navedenu pogodnost, koristite direktan link https://2024.europe.jcon.one/tickets i odaberite tip ulaznice „JUG Pass – 3-Days“ i te pod Java User Group upišite kod „HUJAK“ koji bi trebao omogućiti “Free” ulaznicu. Alternativno, možete sudjelovati i na workshopima obavljenima na https://2024.europe.jcon.one/workshops od kojih su neki potpuno besplatni, a ostali po cijeni od 23.79€.

The JCON EUROPE 2024 will take place this year from 13 to 16 June 2024 as an in-person conference and offers a super program:

4 conference days (incl. 1 workshop day)
4 parallel streams
100+ speakers
100+ sessions
1000+ participants

Dive into the pulsating heart of the Java community at JCON EUROPE 2024, the premier in-person Java community conference in Germany, lovingly organized by the Java User Group Oberpfalz in collaboration with JAVAPRO Magazine.

With the JUG ticket, you can participate in all sessions on all conference days

We look forward to meeting you at JCON – Have fun!

Uneseno pod Java, Konferencije Tagged with Java, JCON, konferencija, programming, software-development

JavaCro’24 – Call for Speakers is open!

29.04.2024.

We have something interesting for you, and it is not far away – look no further than JavaCro’24 – the 13th International Java Conference in Croatia, coming in October!

Join us on October 13-16, 2024, at the breathtaking Island Hotel Istra resort on St. Andrew’s Island (Red Island) near Rovinj, one of the most coveted tourist destinations in this part of Europe. In 3 days we are expecting 400 attendees and 50+ high-quality sessions – and we welcome your contributions! The Call for Speakers is open and here is a short promo video of the conference.

Once more, we will be back at the gorgeous Red Island near Rovinj in October, where we’ll practically have the whole island to ourselves. We strongly believe that in-person and face-to-face sharing of knowledge and experiences is the best way to learn and share, and we look forward to seeing you there and joining us. The Call for Speakers is open until May 31st, and you can start sending your session proposals. We are looking for 50 high-quality sessions from exceptional speakers from this part of Europe as well as some world-famous Java speakers. If you are into databases, you can extend your stay and visit the HrOUG conference.

A gentle reminder – Call for Speakers is open until May 31st!

This year’s proposed conference tracks and topic categories include:

Core Java
Web & Mobile
Methodologies & Tools
Technologies & Solutions
Trends, Future & Community
Best Practices & Success Stories
Workshops & Training

The conference languages are English (preferred) and Croatian.

The first author of the accepted session is not paying the conference fee. HUJAK company members also receive one conference fee free of charge per year and discounts on others. More information on registration, accommodation, and prices will be available in the next months. In the meantime, you can take a look at the beautiful venue. If you have any questions, please feel free to contact us at javacro@hujak.hr.

Be sure to mark your calendars for October 13-16, 2024, for JavaCro’24!
We are eagerly anticipating your session proposals and contributions!
See you in Rovinj!

Uneseno pod Java, JavaCro, Konferencije, Press Tagged with conference, conferences, education, events, news

Konferencija JCON EUROPE 2023, 20.-23.6., Köln

12.06.2023.

U suradnji s partnerom JCON iz Njemačke, članovi HUJAK-a za 2023. godinu imaju mogućnost dobiti besplatne ulaznice za konferenciju JCON EUROPE 2023 (https://2023.europe.jcon.one/) koja će se održati 20.-23. lipnja u Kölnu, a imat će i pristup svim snimkama naknadno.

Da bi ostvarili navedenu pogodnost, koristite direktan link https://bit.ly/JCON23-free-JUG-ticket-eu-N ili JP-JCON23-EU-J-NL odnosno odaberite tip ulaznice „JUG Pass – 3-Days“ i upišite kod „JCON23-JUG_PARTNER“ ili “JP-JCON23-EU-J-NL” koji bi trebao omogućiti popust od 100%.

The JCON EUROPE 2023 will take place this year from 20 to 23 June 2023 as an in-person conference and offers a super program:

3 conference days
1 workshop day (not included in the JUG ticket)
5 live talks simultaneously
daily from 9:00 to 18:00
120+ speakers
120+ sessions
1000+ participants

With the JUG ticket, you can participate in all sessions on all conference days.

Great workshops are available for you on Friday. The workshop tickets are available at https://2023.europe.jcon.one/tickets!

MicroStream – Getting Started & Best Practice – Florian Habermann, CTO MicroStream
RapidClipse – Visual Java IDE – Christian Kuemmel, Project Manager, Senior Software Consultant and Sebastian Späth, Full Stack Developer, MicroStream
Java Card: Java on Smart Cards – Albert Boswald, Concept Engineer and Huy Pham Nguyen, Lead Principal Engineer, Infineon Technologies AG

JCON WORLD 2023 is already planned for November! So become a JCON partner quickly and secure advantages!

We look forward to meeting you at JCON – Have fun!

Uneseno pod Java Tagged with Java, JCON, konferencija

JCON OpenBlend Slovenia 2023 conference on June 1-2 in Portorož, Slovenia

10.05.2023.

JCON OpenBlend Slovenia 2023 is a Java community conference organized by our friends from Slovenian user groups OpenBlend & SIOUG in cooperation with JCON on June 1-2 in Portorož. Early bird prices are available until May 14, and members of HUJAK have a special 10% discount on registration fees.

JCON OpenBlend Slovenia 2023 and MakeIT SIOUG 2023 conferences are set to take place simultaneously on 1-2 June at the same venue – Portorose, Slovenia. The joint event promises to be one of the most exciting tech events of the year, bringing together professionals from around the world to share knowledge, exchange ideas, and connect with peers.

Over two days, attendees of JCON OpenBlend Slovenia 2023 will have the opportunity to participate in two parallel tracks, each with over 30 sessions on topics ranging from Big/Fast Data and Cloud Native to Core Java, IDE & Tools, and Architecture.

With top speakers from leading tech companies such as Red Hat, IBM, Google, Oracle, ASML, Elastic, Apache, Endava, and many more, attendees will have the chance to learn from the best in the business and gain valuable insights into the latest trends and innovations in the industry.

Featured speakers at the event include Gavin King from IBM, who is the author of the popular framework Hibernate and will share his insights on its developments in a session Hibernate ORM, 20 years later. Philipp Krenn from Elastic will talk about Log4shell and why it’s still relevant, while Boris Cergol from Endava will open the conference with a hot keynote about intelligent models like ChatGPT3. The event will also include sessions on the upcoming Java 21 release, virtual threads, Eclipse Microstream, Jakarta EE and many more.

The JCON OpenBlend conference is open to anyone interested in technology, from beginners to seasoned professionals. Whether you’re looking to network with peers, discover new tools and techniques, or gain a deeper understanding of the latest industry trends, this event is not to be missed.

Registration is now open, and early bird pricing is available until 14th May. For more information and to register, visit https://slovenia.jcon.one/. HUJAK members are also eligible for a 10% discount on their registration fees. To claim the discount, HUJAK members (in 2023) should enter the code “HUJAK10” in the comments when registering for the conference.

Uneseno pod Java

DORS/CLUC 2023 Conference on May 11-12 in Zagreb

08.05.2023.

On behalf of our dear friends, colleagues, and partners at HrOpen and HULK, we would like to call you to the DORS/CLUC conference, which will take place on May 11th and 12th in Zagreb.

For the 28th time, the DORS/CLUC conference will take place at the Faculty of Electrical Engineering and Computing, University of Zagreb, and will bring together developers, system administrators, hackers and businesses.

If you are not sure whether DORS/CLUC is right for you, let us make your mind by showing this year’s rich conference program, and the amazing workshops you can attend!

This year’s keynotes: Marko Budiselić, co-founder and CTO of the Croatian open source companies Memgraph and Jeffrey A. McGuire, Open Strategy Partners, Lina Ceballos project manager at Free Software Foundation Europe and Zvonimir Sabljić, the founder of another Croatian open source company – Pythagora.

Marko Budiselić is the co-founder and CTO Memgraph. Marko will give a lecture on the challenges of running a company, managing and developing open source tools in the business environment, thus describing the path of Memgraph as a company, but also as a technology.

Jeffrey A. “jam” McGuire, is a partner of Open Strategy Partners, where he helps organizations grow with the help of open source, business methods and business culture. He will give two lectures: keynote on open technologies and open source – an analytical view of success in the last 24 years, and a look into the future – further; and a second lecture on how to understand the essential technological facts of software as a tool or product, and how to apply them to create a communication plan that will increase its acceptance and use.

Lina Ceballos, Policy Project Manager at the FSFEL, advocates for software freedom, making sure that technology doesn’t undermine people’s rights. The talk will explain how policy decisions and their implementation have a major impact on free software, its ecosystem and its communities. With the help of the framework of our project “Public Money? Public code!”, FSFE advocates laws requiring that publicly funded software developed for the public sector be publicly available under a free software license. In his lecture, he will make a brief overview of previous and current EU policy topics, giving a special focus on the regulations on interoperable Europe, the need for access to the EU to be “Free Software first” and explain the key role that other stakeholders, especially civil society, must play in all this.

Zvonimir Sabljić, initiator of the project and company Pythagora, is an engineer and technological entrepreneur with a master’s degree in informatics. He founded AWW (A Web Whiteboard), which became a major player in the online whiteboard market. At the conference, they will tell what Pythagora is and how it came about for simple reasons – all software requires testing, and today automated tests are the conditions for creating scalable web applications.

Open 4 Business is a business networking event, an integral part of the DORS / CLUC conference, and is intended for everyone who is interested in establishing new business contacts, finding new projects and exchanging ideas with other experts. More information on how to participate and who will appear at Open 4 Business can be found on the conference website: https://www.dorscluc.org/open-4-business/

OpenDataConnected is an initiative of HrOpen members, from which the conference of the same name opendataconnected.eu emerged. As part of OpenDataConnected, DORS/CLUC will feature representatives of the Dutch Ministry of Health and the Ministry of the Interior, representatives of the Central State Office for the Development of the Digital Society, which will organize a datathon as part of the OpenDataConnected track, and Angela Baker, Data Assurance Program Lead From the Open Data Institute. More on the https://www.dorscluc.org/opendataconnected/.

You can still get your tickets here and HUJAK’s representatives will be also there!