What we’re about
This is the official page of the NLJUG - The Dutch Java User Group
The NLJUG is the Dutch Java User Group, which started in 2003. The NLJUG brings software developers, architects, ICT managers, students, new media developers and their business partners together with their interest in all aspects in Java Technology.
The goal of the foundation:
• In general, to look after the interests of the users of software based on Java.
• To spread the knowledge about Java software and infrastructure to all the members.
• To spread the knowledge about how Java works.
• To stimulate the use of Java in professional surroundings, such as companies, organisations, the government and educational fields.
• To improve the contact between professional users and the companies who work with systems based on Java technology, on national and international levels.
We want to achieve this goal by:
• Regularly organizing independent technology conferences for the members of the NLJUG, where the suppliers and the affiliated groups have a chance to present themselves.
• Stimulating, initiating and organizing meet-ups.
• Giving members information through media like Java Magazine and NLJUG.org.
• Keeping in contact with national and international organisations with the same goals.
• Building and keeping contact with suppliers of Java software, knowledge or/and experiences, which are considered to be of importance of our members.
NLJUG is member of the Java Community Process (JCP)
Upcoming events (2)
See all- Join our free NLJUG academy masterclass: Create AI-Infused Apps with LangChain4jNeeds location
Date:
Thursday September 11, 2025Location:
Utrecht, TBCProgram:
17:00 entrance
17:30 food & drinks
18.30 start meet-up
20:30 Q&A and concluding the workshopAbout the masterclass
Generative AI has taken the world by storm over the last year, and it seems like every executive leader out there is telling us “regular” Java application developers to “add AI” to our applications. Does that mean we need to drop everything we’ve built and become data scientists instead now?Fortunately, we can infuse AI models built by actual AI experts into our applications in a fairly straightforward way, thanks to some new projects out there. We promise it’s not as complicated as you might think! Thanks to the ease of use and superb developer experience of Quarkus and the nice AI integration capabilities that the LangChain4j libraries offer, it becomes trivial to start working with AI and make your stakeholders happy :)
In this session, you’ll explore a variety of AI capabilities. We’ll start from the Quarkus DevUI where you can try out AI models even before writing any code. Then we’ll get our hands dirty with some code and exploring LangChain4j features such as prompting, chaining, and preserving state; agents and function-calling; enriching your AI model’s knowledge with your own documents using retrieval augmented generation (RAG); and discovering ways to run (and train) models locally using tools like Ollama and/or Podman AI Lab. In addition, we’ll take a look at observability and fault tolerance of the AI integration and compile the app to a native binary. Maybe we’ll even try some new features, such as generating images or audio!
Come to this session to learn how to build AI-infused applications in Java from the actual Quarkus experts and engineers working on the Quarkus LangChain4j extensions. This is also an opportunity to provide feedback to the maintainers of these projects and contribute back to the community.
About the speakers
Kevin Dubois is a Developer Advocate at Red Hat, passionate about Open Source, Java (Quarkus), and Cloud Native development. With a background as a software engineer in startups, enterprises, and government, he contributes to projects like Quarkus, Knative, Apache Camel, and Podman. He is also active in the Belgian CNCF and Java User Group communitiesAdnan Drina is a Principal Solution Architect at Red Hat, focusing on Application Development and AI. As the Technical Lead for AI and Developer Experience in the Netherlands, he helps organizations implement scalable AI/ML solutions and modern development practices. He is a frequent speaker on Quarkus, DevOps, and AI across Europe.
Don’t miss out this exciting NLJUG masterclass event. RSVP now to secure you place and be part of this an enriching experience. Please note your registration is not complete until you have signed up through the form. This is because of the particulars for the food.
There is no need to eat beforehand/afterwards, we've got food and drinks!
