Join the JEurope 2026 conference
Take part in the third edition one of the largest conferences centered around Java technologies in Warsaw. March 24, 2026 in Warsaw! You must be there!
diamond sponsor
PLATINUM SPONSOR
PLATINUM SPONSOR
ORGANISER
JEurope 2026 is one of the largest conferences about Java in Warsaw.
The third edition launches on March 24, 2026, at ul. Emilii Plater 53 (on the 23rd floor) in the center of Warsaw. It is aimed at IT professionals who want to find their way around the world of the latest technologies, tools, and businesses.
The event brings together architects, consultants, programmers, AI specialists, data specialists, security specialists, and representatives of large companies.
Expect the highest level of presentation and influential speakers from the Polish IT industry. Meet recognized and innovative IT companies that will present themselves at their stands. Connect with companies through the IT Job Fair and IT Services Fair that will take place during the conference.
TOPICS
Check the main themes and find your reason to visit our conference.
Java
Cloud
Software architecture
AI
Developer
DDD
Softskill
Kafka
Why it’s worth it
Job Fairs
One-of-a-kind Job Fairs with offers for different types/classes of specialists of Java technologies.
Big event
It’s one of the largest conferences dedicated to Java in Warsaw. Attend 5 technical presentations about Java technology.
Fresh opportunities
Meet a new company in Poland that is a leading Java employer.
Amazing speakers
The best speakers of the Polish IT scene. Learn their methods for success in IT!
TOPICS
There is no shortage of great speakers at our event!
Adrian Więch
Engineering Manager & IT Instructor, TPConnects Technologies
Grzegorz Piwowarek
Java Expert
Krystian Zybała
Java Expert
DAILY PLAN
AGENDA FOR THE EVENT
11:00
Architect’s View on GenAI with Spring AI and LangChain4j
Generative AI is taking the world by storm. While some use cases may seem questionable, many systems can genuinely benefit from GenAI.
While most attention still focuses on advancing GenAI capabilities, integration with new and existing enterprise-grade systems often gets overlooked.
This talk presents a software architect's perspective on incorporating various GenAI models into your applications. We'll examine key quality attributes (such as portability, maintainability, security, and extensibility) while comparing two popular JVM solutions - Spring AI and LangChain4j. All of that will be illustrated with real-life stories and examples.
Join me as we seek answers to critical questions:
How has the GenAI landscape evolved over last years?
Are GenAI solutions ready for enterprise-grade systems without keeping architects up at night?
Has a clear leader emerged among AI frameworks?
Has the industry finally addressed security, performance, and testability concerns?
Piotr Łaskawiec
Java Expert
11:40
Break and networking
12:30
Break and networking
12:40
Cache Me If You Can: Designing Airline Systems for Billions of Flight Searches
In the airline industry, 99.9% of system traffic is digital waste. For every ticket sold, systems process tens of thousands of searches—a ratio that is exploding as GenAI agents begin shopping on our behalf. In this session, we will discuss the architecture required to survive the so-called "Look-to-Book" crisis. We will look beyond naive caching to explain why simple strategies fail against real-time inventory changes, and discuss how we can build smarter, more complex solutions.
Adrian Więch
Engineering Manager & IT Instructor, TPConnects Technologies
13:20
Break and networking
13:30
JVM Tail Latency Surgery: where p99/p999 comes from and how to cut it
This talk explains where JVM tail latency really comes from and why p99/p999 can break a system even when p50 looks great. We’ll cover the most common sources of latency spikes: safepoints (not just GC), allocation pressure, OS scheduling and CPU migration, contention, and cache issues like false sharing. You’ll leave with a practical workflow ( one hypothesis → one tool → one proof using JFR, async-profiler, and perf) plus a set of fixes that reliably reduce long-tail latency in production hot paths.
Krystian Zybała
Java Expert
14:00
Lunch time
14:30
One App, Many Tenants - Notes from the Field
Multitenancy may seem straightforward until real-world users and compliance show up. Which approach to multitenancy should we choose, and why is one better than another? In this talk, we will review two production cases (you may even be a user of these apps): schema-per-tenant in a relational database (PostgreSQL) and database-per-tenant in a document database (MongoDB). We also cover app-per-tenant and row-level separation, outlining the trade-offs in terms of isolation, cost, and operational complexity, as well as practical patterns for provisioning, routing, and migrations in Java.
Kamil Banach
Java Expert
15:10
Break and networking
16:00
End of the conference
Our conference
Knowledge and inspiration
JEurope 2026 is an excellent place to gain new insights and learn new skills. You’ll have the chance to listen to presentations by outstanding experts in Java technologies, who will share their experiences and best practices. This is a great opportunity to discover new techniques, tools, and approaches related to Java technologies that can help you in your programming skills development.
#java #software #event
Network of contacts
Our onsite conferences creates a perfect opportunity to establish new professional contacts. You’ll be able to meet other Java technology enthusiasts, programmers, specialists, and company representatives who share your interests and passion for this programming language. You can exchange experiences, ask questions, and even find potential collaboration opportunities, and even work.
#networking
Meet us there
The conference will take place on the 23rd floor of the Warsaw Financial Center building at ul. Emilii Plater 53 in the center of Warsaw.
diamond sponsor
PLATINUM SPONSOR
PLATINUM SPONSOR
ORGANISER
join the sponsors
Why is it worth becoming the sponsor of JEurope 2026?
- We’re the one of the largest conferences about Java in Warsaw.
- We reach the most experienced specialists from all over Poland.
- We believe in the high substantive value.
- A chance to present job offers to the conference participants.
- An opportunity to share the knowledge and build a substantive company image.
book your ticket
What’s in it for you?
- Free ticket to the conference.
- Access to unique conference content.
- Possibility to watch substantive presentations.
- Chance to ask questions to speakers after their speeches.
- Opportunity to learn about new companies and new career development opportunities.
- Integration with participants from all over Poland.
- Access to the Java Job Fair.
- Free catering and drinks.
Media partners
Here are the media brands that are already with us! If you want to join, please contact us.
Media partners
Here are the media brands that are already with us! If you want to join, please contact us.
community partners
