Ubiquitous: seeming to be everywhere or in several places at the same time. [Oxford Learner's Dictionary]
Java has conferences abundant, with experts willing to travel to remote cities to speak. They leave behind loved ones to make the Java world a better place. They share their knowledge and prepare their talks in their personal time.
This page is a shout-out to all these fine folks. We tried to be accurate, but it is possible, no, probable, that we made mistakes.
We have four categories: diamond for more than 12 conference appearances, gold for more than 9, silver for more than 4, and bronze for more than 2. Let's show them appreciation for all they do.
To find out how we compiled this list, please see below.
We started with the Java conferences listed at JavaConferences.org and reviewed publicly available speaker lists for 2026:
BaselOne, ConFoo, Dev2next, DevBCN, DevNexus, Devoxx Belgium, Devoxx France, Devoxx Greece, Devoxx Morocco, Devoxx Poland, Devoxx UK, Geecon, Heapcon, JavaCro, Java Day Istanbul, Java Forum Nord, Java Forum Stuttgart, Javaland, JavaOne, JavaZone, JAX, JAX London, JChampions, JCon, JCon Slovenia, JConf Dominicana, JDD Poland, J-Fall, JFokus, JNation, J On The Beach, JPrime, JSpring, Øredev, SpringIO, Voxxed Amsterdam, Voxxed Bucharest, Voxxed CERN, Voxxed Luxembourg, Voxxed Thessaloniki, Voxxed Ticino, Voxxed Zürich, W-JAX, and Ya!vaConf.
We then counted conference appearances and reviewed the names to make spellings consistent. This is a best-effort list and by no means something to take too seriously. We did not differentiate how many talks each speaker gave, and talks at Java User Groups are not included.
If you believe your name should be on this list (or if it shouldn't), please let us know.
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