Andrus is a passionate open-source developer and a member of the Apache Software Foundation. He started programming in Java back in 1998, and since then founded a number of open-source projects: Apache Cayenne - a developer-friendly ORM, Bootique.io - a lightweight Java app platform, Agrest.io - a framework for dynamic REST services, and DFLib - DataFrame structure for Java. In his day job, Andrus is an IT entrepreneur, running a software company called ObjectStyle.

Chandra is a technologist in the financial services industry since 2003 and is programming with Java since 1998. Chandra was selected as a 2019 Java Champion. He is a Java User Group (JUG) Leader, and helps run one of the largest Java user groups, NYJavaSIG and a founder-leader at the Garden State JUG. Chandra conducts code workshops and Code Katas on core Java features. He is a frequent speaker at Java user groups, and technology conferences including Oracle CodeOne, Oracle Code NY, QCon New York, Devnexus, DawsCon and GIDS India. https://github.com/c-guntur/current-abstracts/blob/master/AboutChandraGuntur.adoc

Simon Ritter is the Deputy CTO of Azul Systems. Simon has been in the IT business since 1984 and holds a Bachelor of Science degree in Physics from Brunel University in the U.K. Simon joined Sun Microsystems in 1996 and started working with Java technology from JDK 1.0; he has spent time working in both Java development and consultancy. Having moved to Oracle as part of the Sun acquisition, he managed the Java Evangelism team for the core Java platform, Java for client applications and embedded Java. Now at Azul, he continues to help people understand Java as well as Azul’s JVM technologies and products. Simon has twice been awarded Java Rockstar status at JavaOne and is a Java Champion. He currently represents Azul on the JCP Executive Committee and on the Java SE Expert Group (JSR 379, 383 and 384).

Dr. Venkat Subramaniam is an award-winning author, founder of Agile Developer, Inc., and an instructional professor at the University of Houston. He has trained and mentored thousands of software developers in the US, Canada, Europe, and Asia, and is a regularly-invited speaker at several international conferences. Venkat helps his clients effectively apply and succeed with sustainable agile practices on their software projects. Venkat is a (co)author of multiple technical books, including the 2007 Jolt Productivity award winning book Practices of an Agile Developer. You can find a list of his books at agiledeveloper.com. You can reach him by email at venkats@agiledeveloper.com or on twitter at @venkat_s.

Daniel Hinojosa is a programmer, consultant, instructor, speaker, and author. With over 20 years of experience, he does work for private, educational, and government institutions. Daniel loves JVM languages like Java, Groovy, and Scala; but also works with non-JVM languages like Haskell, Ruby, Python, LISP, C, C++. He is an avid Pomodoro Technique Practitioner and makes every attempt to learn a new programming language every year. Daniel is the author of Testing in Scala and the video of Beginning Scala Programming Video Series for O’Reilly Publishing. For downtime, he enjoys reading, swimming, Legos, football, and cooking.

DaShaun is a husband, father of four, volunteer, struggling athlete, former professional cheerleader, Raspberry Pi enthusiast, and Spring Developer Advocate at Broadcom. Deliberately practicing to build, run, and manage, better software, faster.

Billy is a Java Developer Advocate with the Java Platform Group at Oracle. With over a decade of experience in Java, Billy brings a passion for helping developers find ways to reduce tedious work, such as project initiation, deployment, testing, and validation, through automation and adopting the latest features and tools in the Java ecosystem. Outside of work, Billy enjoys traveling, playing kickball, and cheering on the Kansas City Chiefs. Billy also co-organizes the Kansas City Java users group.

Koichi Sakata is an OpenJDK committer and a Java Champion with a passion for understanding the inner workings of the JVM. Koichi has delved deep into areas such as class file structures, garbage collection, and JIT compilation, driven by his curiosity about how Java operates under the hood. He founded and led the Kansai Java Engineers Group (KanJava) for a decade, fostering a vibrant Java community in Japan. Koichi is also the father of three sons and enjoys exploring different cultures by attending Java conferences around the world. He continues to share his knowledge and enthusiasm for Java.

Tobi is a Java Runtime developer for the J9 VM team in Ottawa, Canada. In the past, he has worked on Interpreter optimizations, JVMTI enhancements, JSR 335, and more. Currently, his main focus is on investigating checkpoint/restore technology at the JVM level.

Gerrit Grunwald is a software engineer that loves coding for around 40 years already. He is a true believer in open source and has participated in popular projects like JFXtras.org as well as his own projects (TilesFX, Medusa, Enzo, SteelSeries Swing, SteelSeries Canvas).  Gerrit blogs regularly at http://harmonic-code.org, he is an active member of the Java community, where he founded and leads the Java User Group Münster (Germany), he is a JavaOne rockstar and a Java Champion. He is a speaker at conferences and user groups internationally and writes for several magazines.