Erik Meijer

Erik Meijer  is a Dutch computer scientist and entrepreneur. From 2000 to early 2013 he was a software architect for Microsoft where he headed the Cloud Programmability Team. Before that, he was an associate professor at Utrecht University. He received his Ph.D from Nijmegen University in 1992.

Meijer’s research has included the areas of functional programming (particularly Haskell) compiler implementation, parsing, programming language design, XML, and foreign function interfaces. His work at Microsoft included C#, Visual BasicLINQVolta, and the Reactive programming framework (Rx) for .NET. In 2009, he was the recipient of the Microsoft Outstanding Technical Leadership Award and in 2007 the Outstanding Technical Achievement Award as a member of the C# team.

In early 2013 Erik Meijer left Microsoft and started Applied Duality Incorporated Applied Duality.

Marcus Lagergren

Marcus Lagergren was one of the founding members of Appeal Virtual Machines, the company that developed the JRockit JVM, bought by BEA Systems in 2002. Marcus has been team lead and architect for the JRockit code generators and has been involved in pretty much every other aspect of JVMs over the years. Between 2007 and 2010, Marcus worked for Oracle on fast Virtualization technology. As of September 2011, he is a member of the Oracle Java language team, investigating dynamic languages on the JVM and general runtime futurist. He is the co-author of the book “Oracle JRockit – the definitive guide“, which, despite the product centric title, has been praised as the best book ever written on JVM internals.

Venkat Subramaniam

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 agile practices on their software projects.

Venkat is a (co)author of multiple books, including the 2007 Jolt Productivity award winning book Practices of an Agile Developer. His latest book is Functional Programming in Java: Harnessing the Power of Java 8 Lambda Expressions. You can reach him by email at or on twitter at @venkat_s.

Vladimir Ivanov

Vladimir Ivanov is a Principal Member of Technical Staff at Oracle, working on development of HotSpot JVM in the area of JIT compilation and JVM-based languages support. Vladimir joined Sun Microsystems (acquired by Oracle, 2010) in 2005 and since then participated in numerous projects related to Java (HotSpot JVM, RTSJ, JavaFX).

Hadi Hariri

Hadi Hariri is a Developer and Technical Evangelist at JetBrains. His passions include software architecture and web development. Book author and frequent contributor to developer publications, Hadi has been speaking at industry events for over a decade. He is based in Spain where he lives with his wife and three sons. Hadi blogs at

Sarah Goff-Dupont

Sarah has worked in software for over 10 years as a test engineer, scrum master, and now as a marketer for developer tools. As a champion of all things agile and automated, she loves talking to developers about their triumphs and frustrations, then blending those insights with her own experience and sharing it. It’s all about making life easier for the nerds. 

Christoph Engelbert

In the early days Christoph started with Basic and C64 I later moved over C++ but eventually started Java around 2005. After some years of web development he started to get interested in the JVM internals and what makes a Java application fast and memory efficient. Now Christoph is mostly helping companies making efficient and scalable architectures and so he’s finally working for Hazelcast.

Matti Pehrs

Matti calls himself a software craftsman and spends his time with back-end development at Spotify. Matti has worked in the IT industry for more than 20 years and with Java almost from its inception. He was part of the team at Sun Microsystem that created the Sun Java Center and Suns Wireless Center of Excellence.

Lukas Eder

I am the founder and CEO of Data Geekery GmbH, located in Zurich, Switzerland. With my company I have been selling database products and services around Java and SQL since 2013. Ever since my Master’s studies at EPFL in 2006, I have been fascinated by the interaction of Java and SQL. Most of this experience I have obtained in the Swiss E-Banking field through various variants (JDBC, Hibernate, mostly with Oracle). I am happy to share this knowledge at various conferences, JUGs, in-house presentations and on my blog. Here’s my conference and JUG talk schedule for the most recent time:

Jeanfrancois Arcand

Jeanfrancois is the CTO of, the company behind the Atmosphere Framework. He is the creator of Atmosphere, a framework for building powerful websockets and asynchronous applications. He is also the author of the Grizzly Framework, the powerful NIO front end used by GlassFish and the creator of AHC, an asynchronous HTTP/WebSocket client library. All his projects are open source and available at

Axel Fontaine

Axel Fontaine is an entrepreneur, public speaker, software development expert and independent consultant based in Munich.

He specializes in Continuous Delivery and hates complexity with a passion. He is the founder and the project lead of Flyway (, the agile database migration framework for Java.

Axel regularly speaks at technical conferences. He currently works on Photon ( to radically simplify the deployment of Java apps, by turning them into ultra-compact perfectly isolated secure VMs and deploying them on any hypervisor with a single command.

You can find him online at and on Twitter as @axelfontaine.

Jan Kronquist

Jan Kronquist is a developer and architect who has worked with everything from games to large enterprise systems. He has been writing Java code for over 16 years and is still a huge fan of the platform and the community, although Clojure is now his favorite language. He works as a consultant helping clients build systems for the cloud, but also enjoys to teach and mentor teams. He is the founder of the open source testing frameworks PowerMock and Awaitility.

Marcus Hirt

Marcus is one of the founders of Appeal Virtual Machines, the company that created the JRockit JVM. He is currently working as lead for the Java Mission Control team. In his spare time he enjoys coding on his many pet projects, composing music, and scuba diving. Marcus has contributed JRockit related articles, whitepapers, tutorials, and webinars to the JRockit community, and has been an appreciated speaker at various conferences, such as Oracle Open World and Java One. He is also one of the two authors behind a popular book about JVM technology.

Michael Hunger

Michael Hunger has been passionate about software development for a long time. He is particularly interested in the people who develop software, software craftsmanship, programming languages, and improving code.For the last few years he has been working with Neo Technology on the Neo4j graph database. As the project lead of Spring Data Neo4j he helped developing the idea to become a convenient and complete solution for object graph mapping.

He is also taking care of Neo4j cloud hosting efforts. Michael now takes care of the Neo4j community in all regards and is involved with activities in all parts of the company. Good relationships are everywhere in Michael’s life. His life concerns his family and children, running his coffee shop and co-working-space, having fun in the depths of a text-based multi-user dungeon, tinkering with and without Lego and much more. As a developer he loves to work with many aspects of programming languages, learning new things every day, participating in exciting and ambitious open source projects and contributing and writing software related books and articles. Michael is also an active speaker at conferences and events and a longtime editor at InfoQ.