This edition took place October 20–21, 2026 in Kraków. It has ended.
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JDD 2026
At a glance
- Dates
- October 20–21, 2026
- Where
- Kraków, Poland
- Format
- in-person
- Primary topic
- Java · also SRE, DevOps, Reliability
- Tickets
- See the official site
- Call for papers
- No deadline on record — see the official site
- Organizer
- See official site
- Official link
- Checked on October 21, 2026
Official link last checked: October 21, 2026 · how we verify
Information aggregated automatically. Verify all dates, locations, and pricing on the official conference website before making arrangements.
About
JDD is a Java and JVM conference organised by PROIDEA, the Polish events company also behind CONFidence, 4Developers and HackYeah. The event began with the Java ecosystem and now covers modern software engineering more broadly, including distributed systems, cloud platforms, security, reliability and AI-assisted development. It is aimed at mid-level and senior Java developers, backend engineers, architects, platform engineers and technical managers. The 2026 edition takes place on 20–21 October at Hotel Metropolo in Kraków, Poland, as a two-day in-person event with parallel tracks. Organisers expect around 600 attendees, more than 50 speakers and over 60 sessions. The programme follows a progression from Java and JVM fundamentals through backend architecture, cloud and platform engineering, and AI-augmented engineering, ending with a look at where software development is heading. Alongside the main talks, attendees can join workshops, an unconference and JUGmajster, a stage dedicated to Java User Groups. Session recordings, catered breaks and an after party give engineers time to compare notes with peers. For the Polish and Central European JVM community, this Java conference 2026 in Kraków remains a long-running meeting point between established backend practice and newer engineering methods.
Location
FAQ — JDD 2026
When and where does JDD 2026 take place?+
JDD 2026 takes place October 20–21, 2026 in Kraków, Poland.
Is JDD 2026 in-person or online?+
JDD 2026 is an in-person event.
How do I register for JDD 2026?+
Registration and tickets are handled on the official website, jdd.org.pl. conventions.io links only to the organizer's own domain, last checked October 21, 2026.
What topics does JDD 2026 cover?+
JDD 2026 covers Java, SRE, DevOps, Reliability, Observability, Networking. JDD is a Java and JVM conference organised by PROIDEA, the Polish events company also behind CONFidence, 4Developers and HackYeah.
How many days is JDD 2026?+
JDD 2026 runs for 2 days, October 20–21, 2026.
Is there a next edition after JDD 2026?+
No later edition has been announced on the organizer's site yet. This page is kept as the archive of the 2026 edition.
Travel questions? See Good to know in the travel guide below.
Planning your trip to Kraków
Contains sponsored linksKrakow in late October is atmospheric rather than warm, with temperatures around 8-13C, early dusk and mist settling over the Vistula. For a Java conference the city offers something increasingly rare: a genuine medieval core where the venue, hotels and evening venues are all within a twenty-minute walk. Kazimierz, the former Jewish quarter south of the Old Town, holds most of the late-opening bars where conference conversations continue.
Getting there & around
Krakow Airport (KRK) lies about 11km west of the centre, connected by a direct train to Krakow Glowny station in roughly 20 minutes. Katowice (KTW) is a budget-airline alternative around 90 minutes away by bus. Krakow Glowny sits at the edge of the Old Town, and trams cover the rest of the city cheaply. Most conference attendees will find walking sufficient within the historic centre.
Skip the taxi queue — pre-book a fixed-price airport transfer with Kiwitaxi. Exploring beyond the city? compare rental cars on Auto Europe.
Staying connected
Polish networks provide fast and inexpensive data across the city. A travel eSIM is the simplest route for visitors from outside the EU who want to avoid roaming charges. Set up an eSIM with Airalo before you board and you're online the moment you land.
After the sessions
Wawel Royal Castle. The fortified hilltop complex above the Vistula that served as the seat of Polish kings, combining a Renaissance courtyard, cathedral and state rooms. Separate tickets apply to each section and daily numbers are capped. Arrive at opening in autumn for the best light. Two hours minimum. Tickets on Tiqets →
Kazimierz district. The historic Jewish quarter, now a dense mix of synagogues, small museums, courtyard bars and the Plac Nowy food stalls. It carries a very different character to the Old Town, quieter by day and busiest late. Walk it in the evening; two hours including a stop for zapiekanka.
Wieliczka Salt Mine. A UNESCO-listed working-era salt mine south-east of the city, with chapels, chandeliers and sculptures carved from rock salt hundreds of metres underground. Tours are guided and involve around 800 steps. Temperature stays near 14C year-round. Allow half a day including transport. Tickets on Tiqets →
Main Market Square and Cloth Hall. One of the largest medieval squares in Europe, ringed by townhouses and centred on the Renaissance Cloth Hall trading arcade. The hourly trumpet call from St Mary's tower breaks off mid-phrase by tradition. Best early morning before tour groups. An hour, plus longer if you enter the basilica.
Good to know
How do I travel from Krakow Airport to the centre?
A direct train runs from the terminal to Krakow Glowny station in about 20 minutes. Tickets can be bought on board or from machines at the airport platform.
Is Krakow walkable for a two-day conference?
Yes. The Old Town, Kazimierz and the main station sit within a compact area, and most points of interest are twenty minutes apart on foot. Trams fill any remaining gaps.
What currency is used and are cards accepted?
Poland uses the zloty, not the euro. Card payment is near universal in Krakow, including on trams and at market stalls, but a small amount of cash is useful for cloakrooms and older bars.
Travel notes written for JDD attendees. Links marked above are affiliate links — we may earn a commission at no cost to you. Verify schedules and opening hours on official websites before you travel.
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