New Java Champion: Andrzej Grzesik

November 14, 2016 | 1 minute read
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Congratulations to the newest Java Champion Andrzej Grzesik! 

Andrzej is a seasoned developer in high velocity software dealing with large amounts of data. He is an expert on Big Data and Java-focused deployment. He has a highly regarded blog in the industry. 

Andrzej is a main contributor of AirCasting, an FOSS project for crowd-sourcing environment monitoring data. He has also cofounded GeeCON, a world-class Java-centric conference, and the Krakow Software Craftsmanship community. He spent time teaching and promoting good design and proper coding practices. He was one of the organizers of a number of Code Retreats, events which teach people to write better tested code. 

Andrzej started a Programming Club at his university (it’s still running!), organizing the biggest student Computer Science conference in Poland ( and in his work as a Sun Campus Ambassador.  He is now a well-known and popular speaker (e.g., most-wanted speaker at this year’s JDD) at software development conferences (JavaONE, JFokus, Devoxx, GeeCON, JDD and more).  In addition to presentations, he also gives workshops on topics revolving around the Java ecosystem. 
He teaches tech speaking skills to encourage people to participate and present at events. Some of his mentees have spoken at this year’s world-recognized HTML5 Developer Conference and GeeCON. Follow him on Twitter at @ags313 and visit his GitHub account at

Java Champions are an exclusive group of passionate Java technology and community leaders who are community-nominated and selected under a project sponsored by Oracle. Learn more about Java Champions

Yolande Poirier

Yolande Poirier manages the online experience for the world's biggest IT community. She empowers developers to successfully grow their projects, businesses, and careers. Telling the story of how people use technology, she curates technical content, interviews IT professionals around the world, and write blogs about Java technologies and projects. She is a speaker at international conferences and JavaOne Rock Star, this year's track lead of the developer community day and a long time member of @jduchess, a network of women in Java. She manages @Java, a network of over 350,000 developer enthusiasts.

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