Conference for developers, architects, DevOps, testers and anyone interested in technologies in the Java stack
50+
lectures
5+
tracks
3
formats
1 ticket = 3 conferences
Check out the Multipass packages, with which you will gain simultaneous access to the speeches of as many as 3 conferences: DevAI by Data Science Summit, Python Summit and Ya!vaConf.
Check the latest updates
📢 Ya!vaConf 2026 is already tomorrow - see you there!
📢 Only 3 days left until Ya!vaConf 2026!
Agenda 2026 is now available
Meet the Program Council 2026
Get to know Ya!vaConf
What is Ya!vaConf? First of all, it is one of the few conferences in Poland focused entirely on the Java technology stack. For years, it has been appreciated for its high substantive level, interesting topics of presentations, as well as a nice atmosphere and space for establishing industry contacts.
An accompanying event is Ya!vaExpo - a job fair, products and services related to the conference theme.
Conference participant profile
- Software Developers
- Testers
- Cloud Consultants
- DevOps
- SysOps
- QA Engineers
- Automation Engineers
- Tech & Team Leads
What are the thematic areas of the conference?
- Java
- Scala
- Kotlin
- Architecture
- App tuning & Performance
- Best practices
- Trends
- AI in Dev
- Cybersecurity in Dev
- DevOps
- Cloud
- QA / Testing
- ...and more
Book a ticket today
and gain access to:
ONLINE Parts
- Monday, October 19th, 2026
- live speeches
- discussions and Q&A sessions with speakers (chat)
- access to specially prepared VoD lectures
ONSITE Parts
- Tuesday, October 20th, 2026
- 35-minute to the point speeches
- round tables after speeches and discussions with speakers
- networking, relaxation and VIP area
Networking (Online & Onsite)
- we support the Matchmaking feature available on the event platform
- exchange of contacts and individual online chat with other participants
- making valuable industry contacts
- inspiring talks, meetings and exchange of experience
Afterparty
- Tuesday, October 20th from 9:00 PM
- held in Warsaw's top coctail bar
- evening meeting for Speakers, Event Partners and participants in selected packages
Contests
- for sending event recommendations to friends: Google Home Hub and Xiaomi Mi Band
- for CV upload: Dron DJI and Google Home Hub
- for visiting the stands of 3 YavaExpo exhibitions: - Online: Google Home Hub and Xiaomi Mi Band, - Onsite: Dron DJI, Google Home Hub and Xiaomi Mi Band
Additionally
- with Multipass ticket - access to DevAI by DSS and Python Summit conferences
- for all conference registrants, instant access to recordings of speeches of previous editions
- up to 30 days to decide and pay the ticket
- official event t-shirt and sweatshirt*
- 3-month access to recordings of speeches*
- certificate of participation in the conference
* for selected packages
Meet speakers of 2026
At the event you will meet and listen to the best specialists from Poland and abroad.
Borys Stokalski
ExpertGPAI/OECD.AI, RETHINK
Tomasz Janczewski
AsystentAkademia Marynarki Wojennej w Gdyni
Jakub Nabrdalik
ArchitektJNA
Marek Pilczuk
BI DeveloperIndieBI
Jan Majewski
Lead AI EngineerMinerva Technology
Piotr Migdał
Founding EngineerQuesma
Germain Safari
Lead machine Learning EngineerAdmind Agency
Ryszard Szwajlik
AI Technical Leadj-labs
Serg Masis
Principal AI ScientistSyngenta
Frederik Pietzko
Developer AdvocateJetBrains
Jacob Barhak
Sole Proprietor, Software Developer, and Computational Disease ModelerJacob Barhak Analytics
Rafał Kowalski
Software EngineerRevolutCheck Agenda 2026
Check Agenda 2026 - Selected by practitioners, the most interesting speeches on trends, latest solutions and production experiences.
19.10.2026
08:30 - 09:00
Online Live
Official Opening
09:00 - 09:35
Online Live
Replacing the LLM in Your Agent with a Small Language Model: A Practical Guide
09:40 - 10:15
Online Live
Frozen at Training Time: Building Production Memory Layers for Stateful AI Agents
10:20 - 10:55
Online Live
Beyond Agents: A New Architecture for Reproducible Code Generation Workflows
11:00 - 11:35
Online Live
How to Keep Coding Agents from Breaking the Repository: Permission Boundaries, Verification Loops, and Human Control
11:40 - 12:15
Online Live
Deciding What Is "Correct": Verification as the New Role of the Engineer in the Agentic Era
12:20 - 12:55
Online Live
Agentic AI in Web3 Security: Autonomous Defenders and the Risks They Introduce
12:55 - 13:55
Online Live
13:55 - 14:30
Online Live
Agents That Never Stop: The Pattern Behind Self-Improving Systems
14:35 - 15:10
Online Live
Wirtualni pracownicy w SDLC: jak delegować pracę agentom AI bez utraty kontroli
15:15 - 15:50
Online Live
Vibes Don't Scale
15:55 - 16:30
Online Live
Co naprawdę psuje się w agentach AI na produkcji: pułapki decyzyjne, pozorna racjonalność i cichy dryf modeli
16:35 - 17:10
Online Live
Więcej niż Chat: Jak modele LLM rewolucjonizują inżynierię cech w tradycyjnych systemach Machine Learning
17:15 - 17:50
Online Live
MicroAgents: Applying Microservices Architecture to Production AI Agents
20.10.2026
08:00 - 08:30
Centrum Nauki Kopernik
08:30 - 09:00
Room 1
09:00 - 09:35
Room 1
[KEYNOTE] When System Knowledge Disappears: How AI Helped Us Regain Control of a Project
09:45 - 10:20
Room 1
How AI Native development is reshaping the team structure
10:35 - 11:10
Room 1
Non deterministic tools applied to non deterministic process - code review harness @ Saily
11:20 - 11:55
Room 1
Agenci AI na straży faktów - generatywna AI w analizie danych i walce z dezinformacją
12:10 - 12:45
Room 1
Building software with AI in 2026: a practical playbook for protecting and monetizing what you ship
12:55 - 13:30
Room 1
Beyond the repository - agentic portfolio management
13:30 - 14:20
Centrum Nauki Kopernik
14:20 - 14:55
Room 1
Agentic coding w prawdziwym kodzie: gdy dostarczanie przestaje być wąskim gardłem
15:05 - 15:40
Room 1
We Have Met the Enemy and It Is Us: How AI Productivity Outpaces System Reliability
15:55 - 16:30
Room 1
What Coding Agents Still Get Wrong
16:40 - 17:15
Room 1
How a "Don't Touch It" Legacy App Became AI-First
17:25 - 18:00
Room 1
From Search to Booking: Building Trusted Android Workflows with App Functions
09:00 - 09:35
Room 2
Gdzie kończy się agent a zaczyna kod — niezawodność systemów multiagentowych na produkcji.
09:45 - 10:20
Room 2
Last Year's Frontier AI Now Fits on Your Laptop
10:35 - 11:10
Room 2
[KEYNOTE] Retrofitting Agentic RAG: The Missing NER Layer for Deterministic Recall. Finding and matching products across domains and millions of pages a week
11:20 - 11:55
Room 2
Vibe-Coding a Second Brain: What an AI Agent Actually Shipped vs the Demo
12:10 - 12:45
Room 2
How many agents can one GPU actually serve? Measuring the multi-user context wall before it hits production
12:55 - 13:30
Room 2
Talk With Your Data: Building AI-Powered Reporting
13:30 - 14:20
Centrum Nauki Kopernik
14:20 - 14:55
Room 2
The Extinct Attractor: What Happened to "I Don't Know" in Instruction-Tuned LLMs
15:05 - 15:40
Room 2
From Trace to Fix: Debugging Production AI Agents with Genie Code and MLflow
15:55 - 16:30
Room 2
Symbioza Predictive ML z LangGraph: wzorce architektoniczne, eksperci i pułapki ewaluacji
16:40 - 17:15
Room 2
Od alertów do diagnozy: architektura autonomicznego agenta SRE
17:25 - 18:00
Room 2
When Data can Act: Security Data Risks in LLM Systems.
13:30 - 14:20
Centrum Nauki Kopernik
14:20 - 14:55
Room 5
[KEYNOTE] Text-to-Diagram for AI Systems: Designing a DSL an LLM Gets Right
15:05 - 15:40
Room 5
Intent Before Intelligence: Fine-Tuning Small Models for Smarter Routing
15:55 - 16:30
Room 5
When AI Agents Fail in Production: Tracing, Budgets, and Tool Execution Ledgers
16:40 - 17:15
Room 5
Generative UI on Ollama Cloud: forcing a small open-weight model into legal moves
17:25 - 18:00
Room 5
AI end-to-end claim handling: od zgłoszenia szkody do błyskawicznej decyzji
10:35 - 11:10
Room RT
Autonomous Research w softdevie
11:20 - 11:55
Room RT
Co agenci AI muszą wiedzieć o naszych systemach - i skąd mają czerpać tę wiedzę?
12:10 - 12:45
Room RT
How to plan and control AI expenses
12:55 - 13:30
Room RT
How to use AI for code & design without generating slop?
14:20 - 14:55
Room RT
AI Agents - technicznie
15:05 - 15:40
Room RT
Kill Switch for AI: bare minimum or just the start?
09:40 - 09:55
Networking Zone
Ask a Speaker: [KEYNOTE] When System Knowledge Disappears: How AI Helped Us Regain Control of a Project
09:40 - 09:55
Networking Zone
Ask a Speaker: Gdzie kończy się agent a zaczyna kod - niezawodność systemów multiagentowych na produkcji.
10:25 - 10:40
Networking Zone
Ask a Speaker: Scaling Agentic Workflows: How We Built an MCP-Backed Engineering Operating Model
10:25 - 10:40
Networking Zone
Ask a Speaker: Last Year's Frontier AI Now Fits on Your Laptop
11:15 - 11:30
Networking Zone
Ask a Speaker: Autonomous Research w softdevie
11:15 - 11:30
Networking Zone
Ask a Speaker: Non deterministic tools applied to non deterministic process - code review harness @ Saily
11:15 - 11:30
Networking Zone
Ask a Speaker: [KEYNOTE] Retrofitting Agentic RAG: The Missing NER Layer for Deterministic Recall. Finding and matching products across domains and millions of pages a week
12:00 - 12:15
Networking Zone
Ask a Speaker: Vibe-Coding a Second Brain: What an AI Agent Actually Shipped vs the Demo
12:00 - 12:15
Networking Zone
Ask a Speaker: [TOPIC SOON]
12:00 - 12:15
Networking Zone
Ask a Speaker: [TOPIC SOON]
12:50 - 13:05
Networking Zone
Ask a Speaker: Building software with AI in 2026: a practical playbook for protecting and monetizing what you ship
12:50 - 13:05
Networking Zone
Ask a Speaker: How many agents can one GPU actually serve? Measuring the multi-user context wall before it hits production
12:50 - 13:05
Networking Zone
Ask a Speaker: [TOPIC SOON]
13:35 - 13:50
Networking Zone
Ask a Speaker: Talk With Your Data: Building AI-Powered Reporting
13:35 - 13:50
Networking Zone
Ask a Speaker: From Jobs to Workflows: Architecting the Human Layer of AI-Assisted Tech Teams
13:35 - 13:50
Networking Zone
Ask a Speaker: [TOPIC SOON]
15:00 - 15:15
Networking Zone
Ask a Speaker: AI Agents - technicznie
15:00 - 15:15
Networking Zone
Ask a Speaker: [KEYNOTE] Text-to-Diagram for AI Systems: Designing a DSL an LLM Gets Right
15:00 - 15:15
Networking Zone
Ask a Speaker: Agentic coding w prawdziwym kodzie: gdy dostarczanie przestaje być wąskim gardłem
15:00 - 15:15
Networking Zone
Ask a Speaker: The Extinct Attractor: What Happened to "I Don't Know" in Instruction-Tuned LLMs
15:45 - 16:00
Networking Zone
Ask a Speaker: [TOPIC SOON]
15:45 - 16:00
Networking Zone
Ask a Speaker: We Have Met the Enemy and It Is Us: How AI Productivity Outpaces System Reliability
15:45 - 16:00
Networking Zone
Ask a Speaker: Intent Before Intelligence: Fine-Tuning Small Models for Smarter Routing
15:45 - 16:00
Networking Zone
Ask a Speaker: From Trace to Fix: Debugging Production AI Agents with Genie Code and MLflow
16:35 - 16:50
Networking Zone
Ask a Speaker: Symbioza Predictive ML z LangGraph: wzorce architektoniczne, eksperci i pułapki ewaluacji
16:35 - 16:50
Networking Zone
Ask a Speaker: What Coding Agents Still Get Wrong
16:35 - 16:50
Networking Zone
Ask a Speaker: When AI Agents Fail in Production: Tracing, Budgets, and Tool Execution Ledgers
17:20 - 17:35
Networking Zone
Ask a Speaker: Generative UI on Ollama Cloud: forcing a small open-weight model into legal moves
17:20 - 17:35
Networking Zone
Ask a Speaker: How a "Don't Touch It" Legacy App Became AI-First
17:20 - 17:35
Networking Zone
Ask a Speaker: Od alertów do diagnozy: architektura autonomicznego agenta SRE
18:05 - 18:20
Networking Zone
Ask a Speaker: AI end-to-end claim handling: od zgłoszenia szkody do błyskawicznej decyzji
18:05 - 18:20
Networking Zone
Ask a Speaker: When Data can Act: Security Data Risks in LLM Systems.
18:05 - 18:20
Networking Zone
Ask a Speaker: From Search to Booking: Building Trusted Android Workflows with App Functions
19:00 - 00:00
Kandela Bar, Elektrownia Powiśle
19:30 - 20:30
Kandela Bar, Elektrownia Powiśle
VoD
08:00 - 08:10
Online VoD
Generative UI: These Slides Don't Exist Yet
08:10 - 08:20
Online VoD
Jak zbudować agentyczny zespół analityczno-architektoniczny
08:20 - 08:30
Online VoD
Your Agent Has 50 Tools. Now What?
08:30 - 08:40
Online VoD
Your Pipeline Runs in 4 Minutes. The Business Waited 3 Weeks: Measuring Flow, Not Uptime, in Data & ML Platforms
08:40 - 08:50
Online VoD
The Judge Problem: Scaling Production Agents with Dynamic Multi-Model Verification
08:50 - 09:00
Online VoD
AI needs DevOps
09:00 - 09:10
Online VoD
LLMs as Prediction Models: How Prompts Bound the Space of Possible Answers
09:10 - 09:20
Online VoD
Jak NIE robić projektów w Data Science
09:20 - 09:30
Online VoD
Skalowalny web scraping w erze LLM: kiedy AI faktycznie pomaga, a kiedy tylko przepala budżet
09:30 - 09:40
Online VoD
Automating CI/CD Pipeline Remediation: Classifying and Triaging Flaky Tests via LLM Log Parsing
09:40 - 09:50
Online VoD
AI-Driven Test Automation with Claude Code: Real-World Lessons from Production
09:50 - 10:00
Online VoD
AI nie naprawi waszego procesu. Za to zrobi go szybszym
10:00 - 10:10
Online VoD
Scraping Without the Bill: Architecting Resilient Agentic Web Pipelines with Local Language Models
10:10 - 10:20
Online VoD
Harness Engineering - Principles and Practices
10:20 - 10:30
Online VoD
When a Dash Means Zero: Giving AI Trustworthy Context from Open Government Data
10:40 - 10:50
Online VoD
From Model to Platform Product: Engineering Scalable, Multi-Tenant ML Architecture for Cross-Team Deployment
10:50 - 11:00
Online VoD
Before the Pull Request: Detect Multi-Agent Rework While It Is Still Happening
11:00 - 11:10
Online VoD
Beyond Agents: A New Architecture for Reproducible Code Generation Workflows
The event is being held concurrently with DevAI by Data Science Summit and Python Summit. With the Multipass package, you get access to all the speeches of the 3 conferences.
What do they say about us?
We invite you for a large dose of diverse and practical knowledge from respected speakers from Poland and the world.
For the more advanced, we have prepared e.g. dedicated Application Tuning & Performance path.
DevOps and Architects will not be bored.
There will also be a lot of interesting QA stuff, plus cool t-shirts, sweatshirts and an after party with tasty drinks - what more could you want? ;)
The IT Security for Developers path should be interesting for developers as well as people dealing with infrastructure security.
Location
Online
Monday, October 19th, 2026
On the dedicated platform
available for logged-in users.
Onsite
Tuesday, October 20th, 2026
Copernicus Science Centre
Conference Centre
Wybrzeże Kościuszkowskie 20
00-390 Warsaw
Programme Council 2026
Paweł Janusz
Team LeaderAppfire
Bartek Kuczynski
Fabricator-GeneralTyrsoft
Cezary Sanecki
Software EngineerAllegro
Artur Skowroński
Head of Java/Kotlin DevelopmentVirtusLabŁukasz Sowa
Managing partnerIteratorsMichał Bijata
Prezes zarząduFundacja Academic PartnersWojciech Zięba
Java/Kotlin Developer | Warsaw JUG LeaderJit TeamSponsors 2026
YavaExpo
Conversations about technological challenges, industry products and services Stay up to date with what's happening on the market. Talk directly to suppliers of industry-specific products and services. 
Leading IT / data science employers in one place At Expo you will meet industry leaders from Poland and abroad. Register to gain access to classified offers and apply to all recruiting Expo Exhibitors at once. 
1:1 meetings Choose a convenient date, type and topic of the meeting and schedule an interview (online or in-person) with a representative of the organization. 
From junior to expert Regardless of your level of experience and the area you deal with, you will always find something interesting for yourself at the Expo.
- Monday, October 19th, 2026, Online
- Tuesday, October 20th, 2026, Copernicus Science Centre
- Hours: 9:30 AM - 3:30 PM
- Access: free (registration required)
Exhibitors 2026
At the event, you will meet employers and service providers from the IT / data science field, who will directly introduce you to the profiles of their organisations and talk about their offers.
Products and Services
Recruitment
Event patrons
Event Organizers
Main organizer
Since 2005, we have been supporting the Polish IT/data science community in its development. We are not only the organizer, but also the initiator of many significant events addressed to professionals and students from the industry, such as: Warsaw IT Days, Data Science Summit, The Hack Summit, Ya!vaConf, MS Tech Summit, IT Job Fair and many meetups. We also help organize IT and data science conferences for companies/organizations interested in this type of activities. If you have any questions, please contact us.
Previous editions of the event
FAQ
1.Who is YavaConf aimed at?
Ya!vaConf is a conference for developers, architects, DevOps, testers and anyone interested in Java stack technologies.2.What elements does an event consist of?
YavaConf is primarily a large-scale conference on Java technology stack. The conference is also accompanied by a number of other elements and attractions, including:⚬ YavaExpo - industry fair of job, products and services,
⚬ afterparty - evening networking meeting,
⚬ matchmaking (available to participants of selected packages) - a dedicated functionality on the event platform that allows to establish contacts between event participants and individual online chat.
3.What is the formula of the event in 2026 (online, onsite)?
The event will take place both in person and online. On the first day (Monday, 19 October), the conference and Expo will be held online via participants' accounts on a dedicated platform. The second day (Tuesday, 20 October) will take place in person at the Copernicus Science Centre Conference Centre in Warsaw - there, you will also be able to listen to all the presentations from the onsite tracks and visit the stands of in-person exhibitors.The elements of the event, including individual online and onsite occurrences, are completely independent and separate from each other. Onsite content is not available to online participants and vice versa. Only participants of the online + onsite packages receive access to the entire event.
