Mani Sarkar

Mani Sarkar is a passionate Java/JVM developer currently living and working in London, UK for a data analytics Bright North, an LJC Advocate to the @adoptopenjdk & @adoptajsr programs, JCP Member, OpenJDK contributor (submitted a number of patches), active member of a number of developer communities, speaker, blogger, and tweets interesting topics. He sees himself working in the areas of core Java, JVM, JDK, Hotspot, Nashorn and Performance Tuning. In his free time he also works on open-source projects one of them being in relation to RESTful APIs, others can be found on his personal github and bitbucket accounts. He is also an advocate of software craftsmanship principles like BDD and TDD, practices like pair-programming & collaborations – fervent user of SonarQube, analysing code quality on a regular basis. Recently he has been dabbling with concepts like Machine Learning and Data Analytics. A regular at many talks, conferences and hands-on-workshops in and around the UK and other parts of Europe.

Alexander Shopov

Alexander Shopov has been a programmer for more than a decade now, has a wide experience in programming and has survived it. He never lets common knowledge stop him since he knows the purpose of it is to stop you.

Relevant to Java2Days are his experience in Java, JavaScript and databases large and small. He has taken part in many facets of the software industry:

  • Applications and services for the administration almighty;
  • Catering to the needs and whims of commercial clients in the fashion, retail, relocation, building, furniture business;
  • Currently he is a software developer at Cisco Systems.

He suspects that someone has been naïve enough to scream “Enterprise” three times into a mirror and this explains why the Enterprise still haunts us.

Otherwise he is generally a nice guy except for the times when he is not.He wields his sense of humor in mysterious ways. He loves free and open source software, contributes to it and is the Bulgarian coordinator of GNOME translations.

Mite Mitreski

Mite Mitreski works on custom enterprise application development and consultancy with primary focus on Java and JVM-based solutions. He has worked as a programming course trainer in the past. Currently he is deeply involved in activities surrounding development groups in Macedonia, where he is currently the JUG Leader of Java User Group, Macedonia. Mite has a great passion for free and open source software, open data formats, and the open web. Occasionally, he writes at his blog and can be reached on Twitter. Recently he co-author a book titled HTML 5 Data and Services Cookbook.

Vassil Popovski

Vassil Popovski is a software developer, architect and manager with more than 14 years industry experience, mainly with Java enterprise projects. Vassil is currently Director R&D at VMware, where he is leading a team of 100+ engineers working on various projects. Before that he was Director QE, leading the entire quality engineering organization in VМware Bulgaria. He also spent couple of years as staff engineer at VMware working in Cloud computing department and he was leading the definition and the implementation of the vCloud API – open, platform independent, RESTful API that defines an interface for providing and consuming virtual resources in the cloud.

Vassil is an expert in cloud computing, OSGi, RESTful web services, continuous integration, unit and integration testing, distributed and transaction systems, advanced algorithms and data processing.

David Delabassee

David Delabassee is a Java EE / GlassFish evangelist working for Oracle. Prior to Oracle, David spent a decade at Sun Microsystems focusing on Java end-to-end (from the smart card to the high end server), related technologies and the developer tools. In his various roles, David has been involved in numerous Java projects since the early days of this technology. David lives in Belgium and in his spare time, he enjoy tinkering and playing with technologies such as Java, Arduino, Linux, Home Automation, etc. You can follow David on Twitter under @delabassee .

Siegfried Goeschl

CTO, Independent Consultant and Open Source Evangelist

Siegfried Goeschl is ASF member, Apache Turbine PMC member, Apache JSPWiki mentor, former Apache Isis mentor & Apache Common PMC. He became involved with Open Source in 2000 contributing JUnitPP (one of the first JUnit extensions ever), got involved with Maven and confused with Jelly, co-founded the maven-plugins project on SourceForge and wrote an Avalon container now being part of Apache Turbine (this makes him to the last Avalonier in this part of the universe). His professional interests are centered around writing server-side Java code, quality assurance, test-driven development and build management. If there is some time left besides his company, consulting work, Open Source software development and family he helps at the local Java User Group.

Manuel Bernhardt

Manuel is a software engineer with a passion for building web-oriented systems, both in the backend and at the front-end. He started working with Scala in 2010 after spending a long time with Java, and can’t get enough of it. He lives in Vienna where he is co-organizer of the Scala User Group. He’s enthousiastic about the Scala-based technologies and the vibrant community, and is looking for ways to spread its usage in the industry.

John Willis

VP of Customer Service and Enablement, Dell (formally Enstratius)

John Willis has worked in the IT management industry for more than 30 years. Prior to joining Dell (formally Enstratius), Willis was the VP of Solutions for DTO Solutions where he led the transition to a new suite of automated infrastructure and DevOps solutions. Prior to DTO Solutions. Willis was the VP of Training & Services at Opscode where he formalized the training, evangelism, and professional services functions at the firm. Willis also founded Gulf Breeze Software, an award winning IBM business partner, which specializes in deploying Tivoli technology for the enterprise. Willis has authored six IBM Redbooks for IBM on enterprise systems management and was the founder and chief architect at Chain Bridge Systems.

Josh Long

Josh Long is the Spring developer advocate. Josh is the lead author on Apress’ Spring Recipes, 2nd Edition, and a SpringSource committer and contributor. When he’s not hacking on code, he can be found at the local Java User Group or at the local coffee shop. Josh likes solutions that push the boundaries of the technologies that enable them. His interests include scalability, BPM, grid processing, mobile computing and so-called “smart” systems. He blogs at or

Koen Aers

Koen is currently driving the Eclipse integration of the JBoss Forge project. Earlier he was responsible for the Eclipse support and the different workflow editors of the jBPM project. Koen graduated as a Civil Engineer from the Belgian Royal Military Academy and obtained an additional Master’s Degree in Information Technology at the Brussels Free University. Before joining JBoss and Red Hat, he worked respectively in the IT department of the Belgian Army and as a software consultant. Koen is a regular speaker at public events and conferences.