A single conversation with a wise man is better than ten years of study.
~ Chinese Proverb ~


  • Jurgen Appelo

    Jurgen Appelo is a writer, speaker, trainer, entrepreneur, illustrator, developer, manager, blogger, reader, dreamer, leader, freethinker, and… Dutch guy.

    Since 2008 Jurgen writes a popular blog at www.noop.nl, which deals with development management, software engineering, business improvement, personal development, and complexity theory. He is the author of the book Management 3.0: Leading Agile Developers, Developing Agile Leaders, which describes the role of the manager in agile organizations. He is also a speaker, being regularly invited to talk at business seminars and conferences around the world.

    After studying Software Engineering at the Delft University of Technology, and earning his Master’s degree in 1994, Jurgen Appelo has busied himself starting up and leading a variety of Dutch businesses, always in the position of team leader, manager, or executive. Jurgen has experience in leading a horde of 100 software developers, development managers, project managers, business consultants, quality managers, service managers, and kangaroos, some of which he hired accidentally.

    Nowadays he works full-time developing innovative courseware, books, and other types of original content. But sometimes Jurgen puts it all aside to do some programming himself, or to spend time on his ever-growing collection of science fiction and fantasy literature, which he stacks in a self-designed book case. It is 4 meters high.

    Jurgen lives in Rotterdam (The Netherlands) -- and sometimes in Brussels (Belgium) -- with his partner Raoul. He has two kids, and an imaginary hamster called George.

  • Anton Arhipov

    Software Engineer and JRebel Product Lead at ZeroTurnaround. Professional interests include programming laguages,

    middleware and tooling. Anton is also the Estonian JUG (www.jug.ee) leader and co-organizer of the large developer community in

    Tallinn - Devclub.eu. Blogging at http://arhipov.blogspot.com. You can follow Anton at Twitter @antonarhipov

  • Michał Bartyzel

    Michał Bartyzel is a consultant and trainer at BNS IT company. Every single day he works with software developers helping them dealing with legacy code and software architecture. His interests and experience covers domains such a: manufacturing execution, telecommunication, e-commerce and finances.

    Michal effectively works for customers on business-IT communication issues.

    His thoughts can be followed on twitter @MichalBartyzel or his blog http://mbartyzel.blogspot.com.

  • Szymon Brandys

    Szymon is a software developer working for IBM Poland in Krakow. He leads a team working on the Platform Workspace components (http://wiki.eclipse.org/Workspace_Team). Recently along with his team he is involved in the Eclipse Orion project (http://wiki.eclipse.org/Orion).

    Orion's objective is to create a browser-based open tool integration platform which is entirely focused on developing for the web, in the web.

    Szymon is also an organizer of Eclipse Demo Camps in Krakow and speaker at conferences like EclipseCon and JDD.

  • Andrey Breslav

    Andrey is the lead language designer working on Project Kotlin at JetBrains. He started his career at Borland working on language implementations for MDA support. He spent a few years teaching in college and developed courses in Basics of OOP, Software Design and Programming Practice. Andrey joined JetBrains to start Project Kotlin in 2010. He serves as a Java Community Process expert in a group working on JSR-335 ("Project Lambda").

    Andrey is a frequent conference speaker delivering talks at venues like OSCON, StrangeLoop and Devoxx.

  • Martin Burlinski

    Martin Burlinski is a Software Developer Manager at Taleo Inc Poland. He has graduated from Computer Science at York University in Toronto, Canada. After a brief stint at IBM Canada he has decided to venture into a wild world of start-ups working for such famous companies as BeautifullyMisguided.com and Tucows. More recently he has been working for Taleo Inc, US and just now has transferred to Poland. He is a pragmatic software engineer and a great champion of open source solutions.

  • Tomasz Cejner

    Tomek is living two lives. In one life, he's Tomasz Cejner, program writer for a respectable software company, he has a social security, he pays his taxes, and he helps carry out garbage at home. The other life is lived in computers, where he goes by the hacker alias @tomekcejner doing iOS programming for fun, and explores virtually all buzzword technologies worth looking at. Fortunately for Enterprise Java world he didn't become a game programmer as he always wanted to be.

  • Stephen Chin

    Stephen Chin is a technical expert in client UI technologies, and Chief Agile Methodologist at GXS. He is lead author of the Pro Android Flash title and coauthored the Apress Pro JavaFX Platform title, which is the leading technical reference for JavaFX. In addition, Stephen runs the very successful Silicon Valley JavaFX User Group, which has hundreds of members and tens of thousands of online viewers, and also is co-organizer for the Flash on Devices User Group. Finally, he is a Java Champion, chair of the OSCON Java conference, and an internationally recognized speaker featured at Devoxx, Jazoon, and JavaOne, where he received a Rock Star Award. Stephen can be followed on twitter @steveonjava and reached via his blog: http://steveonjava.com/

  • Hamlet D'Arcy

    Hamlet D'Arcy has been writing software for over a decade, and has spent considerable time coding in C++, Java, and Groovy. He's passionate about learning new languages and different ways to think about problems. Hamlet is the founder of the Basel-based Hackergarten open source coding group, and regularly participates and speaks at local and international user groups and conferences. Hamlet is a committer on the Groovy and CodeNarc projects, and is a contributor on a few other open source projects (including JConch and the IDEA Groovy Plugin). He blogs regularly at http://hamletdarcy.blogspot.com and can be found on Twitter as HamletDRC (http://twitter.com/hamletdrc).

  • Luke Daley

    Luke Daley is a Principal Engineer with Gradleware. At Gradleware Luke works to make Gradle an even better way to build and helps teams reach new levels of project automation and quality. When he's not working on Gradle, you'll find Luke hacking on other projects in the Groovy ecosystem like Grails (a Groovy web development framework), Spock (a next generation testing framework for the JVM) and Geb (a productivity focussed Groovy browser automation tool).

    With a solid background in Enterprise Automation, Luke believes strongly that tools can and should empower software professionals to achieve and innovate, which puts him right at home at Gradleware.

    Taking a break from the kangaroos and koalas of Australia, Luke is currently living the expat in London life and you'll often find him talking about Gradle and other topics at conferences and user groups throughout Europe and the World.

  • Sadek Drobi

    Sadek Drobi, CTO of Zenexity, a software engineer specialized in design and implementation of enterprise applications with a particular focus on bridging the gap between the problem domain and the solution domain. As a core Play developer, he works on the design and implementation of the framework.

    twitter: @sadache

    blog: http://sadache.tumblr.com

    company: www.zenexity.com

  • Szczepan Faber

    Szczepan Faber is a busy crusader. He burns heretics of waterfall, gets rid of barbarians who shun developing proper Christian code or proper project automation (usually, both sins come together). He forged a powerful artifact called Mockito. The magical runes embedded in that weapon grant the bearer +3 to the unit testing skill and +5 to the developer happiness. Currently, Szczepan is busy getting Gradle 1.0 out, helping out enterprises with their project automation challenges in the meantime. Szczepan trained & practiced combat at ThoughtWorks/London and Sabre/Krakow. His diaries are hidden on the monkeyisland.pl. His and his team mates profiles can be found at http://gradleware.com/team

  • Arun Gupta

    Arun Gupta is a Java evangelist working at Oracle. Arun has over 15 years of experience in the software industry working in the Java(TM) platform and several web-related technologies. In his current role, he works to create and foster the community around Java EE and GlassFish. He has been with the Java EE team since its inception and contributed to all releases. Arun has extensive world wide speaking experience on myriad of topics and loves to engage with the community, customers, partners, and Java User Groups everywhere to spread the goodness of Java.

    He is a prolific blogger at http://blogs.oracle.com/arungupta with over 1200 blog entries and frequent visitors from all around the world with a cumulative page visits > 1.2 million. He is a passionate runner and always up for running in any part of the world. You can catch him at @arungupta.

  • Michael Heinrichs

    Michael Heinrichs has been part of the JavaFX development team right from its early days in 2008. During the early access phase until the release of JavaFX 1.0, he was part of the JavaFX Compiler team. After that he joined the JavaFX Mobile team where he was mainly responsible for performance tuning. In 2010 he became the technical lead for the core components of JavaFX: JavaFX Beans and Properties, the Binding API, the new collections and the Animation API.

  • Raffi Krikorian

    At Twitter, @raffi leads the Applications Services group, the custodians of Twitter’s core logic – his teams manage, amongst other things, the business logic, scalable delivery, APIs, and authentication of Twitter’s application. Previously, he was the lead of the public APIs as well as being the one of those behind Twitter’s Geospatial APIs.

    Before Twitter he used to create technologies to help people frame their personal energy consumption against global energy production (Wattzon – Business Week’s “Best Idea” 2008), and also ran a consulting company building off-the-wall projects. At one point, he used to teach at NYU’s ITP (created the class “Every Bit You Make”) and spent way too much time as a student at MIT and the MIT Media Lab (Internet 0 – Scientific American September 2004).

  • Andreas Krogh

    Andreas has 14 years experience doing commercial software-development. The last 13 years he has been working almost exclusively with JAVA and JEE. He recognizes the importance of maintainability of software and follows closely technologies and frameworks suitable for building web-applications, both front-end and back-end. He has been working with Scala for the past 3 years and has successfully migrating several larger projects away from application-servers and fragile JEE web-frameworks over to light-weight frameworks and web-containers using Scala+Lift. Andreas is a committer on the Lift framework and in February 2012 he co-founded Lift Co. to provide enterprise-grade support for the Lift-framework.

  • Guillaume Laforge

    Guillaume Laforge is the project lead of Groovy, the highly popular and successful dynamic language for the JVM. He co-authored Manning's best seller "Groovy in Action" with Dierk König, and is working for SpringSource (a division of VMWare) where he's hacking full time on cool and Groovy stuff. You can meet Guillaume at conferences around the world where he evangelizes the Groovy dynamic language, Domain-Specific Languages in Groovy, the agile Grails web framework or the Gaelyk lightweight toolkit for Google App Engine.

  • Jacek Laskowski

    Jacek Laskowski has been getting the gist of the Java Enterprise Edition (JEE) specification and its ecosystem for years and will surely be spending some more to come. He's a committer of Apache OpenEJB and Apache Geronimo. He's recently been very interested in functional languages and the decision to study a few ones - Clojure, JavaScript, JRuby and Scala - shapes his current self-learning activities. He's the founder and a co-leader of the Warszawa Java User Group (Warszawa JUG) that hosts the jvarsovia and warsjawa conferences in Poland. He's a IT Specialist for WebSphere at IBM Polska. He blogs at his latest endeavours at http://blog.japila.pl.

  • Sylvain Lebresne

    Sylvain is a committer and PMC member on the Apache Cassandra distributed database working at Datastax. He used to work at Yakaz, a real-time classified ads web service, where he developed the storage infrastructure built on Cassandra. He holds a Ph.D in Computer Science from the University of Paris 7.

  • Joonas Lehtinen

    Joonas Lehtinen is one of the core developers of Vaadin, a Java-based framework for building business-oriented Rich Internet Applications (RIAs). Joonas has been developing applications for the web since 1995 with a strong focus on Ajax and Java. He is the founder and CEO of Vaadin Ltd.

  • James Lewis

    James Lewis is a Principle Consultant for ThoughtWorks based in the UK and a member of the ThoughtWorks Technical Advisory Board. James studied Astrophysics in the 90's but got sick of programming in Fortran. Fourteen years of DBA, Java development, software design and software architecture later, he believes that writing software is the easy part of the problem. Most of the time it's about getting people thinking right. Most recently, James has been spending his time helping ThoughtWorks' clients develop enterprise software as a coding architect and is particularly interested in the design of distributed systems and the web as middleware.

  • Paweł Lipiński

    Paweł is a software architect and an agile coach. For over ten years he has been working in the design, development, and auditing of projects in a multitude of fields like banking, insurance, telco, and media. Currently he helps teams succeed with their projects as a trainer, mentor and coach. He's an owner of Pragmatists, a Warsaw-based company which creates high quality software using agile methods. He's also a co-founder of the Agile Warsaw group, an author of a java BDD library called Tumbler, and a speaker on agile- and java-related events.


    Agile Design

  • Josh Long

    Josh Long is the Spring developer advocate, an editor on the Java queue for InfoQ.com, and the lead author on several books, including Apress’ Spring Recipes, 2nd Edition. Josh has spoken at many different industry conferences internationally including TheServerSide Java Symposium, SpringOne, OSCON, JavaZone, Devoxx, Java2Days and many others. When he's not hacking on code for SpringSource, 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 blog.springsource.org or joshlong.com.

  • Bartosz Majsak

    Bartosz Majsak works as a software developer and consultant at Cambridge Technology Partners based in Zurich, Switzerland. He is a passionate about open source technologies and testing methodologies. In the spare time he is contributing to open source projects and writing technical articles. He is a lead of two JBoss Arquillian modules - Persistence Extension which makes writing database oriented tests even easier and Spock Test Runner which gives your Arquillian tests some BDD and Groovy love. One thing which might prove that he is not a total geek is his addiction to alpine skiing.

  • Robert C. Martin

    President and CEO Uncle Bob Consulting, Object Mentor

    Robert C. Martin, aka, Uncle Bob has been a software professional since 1970 and an international software consultant since 1990. In the last 40 years, he has worked in various capacities on literally hundreds of software projects. In 2001, he initiated the meeting of the group that created Agile Software Development from Extreme Programming techniques. He is also a leading member of the Worldwide Software Craftsmanship Movement - Clean Code.

    He has authored "landmark" books on Agile Programming, Extreme Programming, UML, Object-Oriented Programming, C++ Programming and most recently Clean Code and Clean Coder. He has published dozens of articles in various trade journals.

    He has written, directed and produced numerous "Code Casts" videos for software professionals.

    Bob is a regular speaker at international conferences and trade shows. He is a former editor of the C++ Report.

    Mr. Martin is the founder, CEO, and president of Uncle Bob Consulting, LLC and Object Mentor Incorporated.

  • Matthew McCullough

    Matthew McCullough is an energetic 12 year veteran of enterprise software development, open source education, and co-founder of Ambient Ideas, LLC, a Denver consultancy. Matthew currently is a member of the JCP, reviewer for technology publishers including O'Reilly, author of the DZone Maven RefCard, and President of the Denver Open Source Users Group. His experience includes successful J2EE, SOA, and Web Service implementations for real estate, financial management, and telecommunications firms, and several published open source libraries.

    Matthew jumps at opportunities to evangelize and educate teams on the benefits of open source. His current interests are Cloud Computing, Maven, iPhone, Distributed Version Control, and OSS Tools.

    Matthew resides in Denver with his beautiful wife and baby daughter, who all are active in nearly every outdoor activity Colorado offers.

  • Luca Milanesio

    Luca Milanesio is the co-founder of GerritForge (http://www.gerritforge.com) and has more than 20 year of Software Development and Application Lifecycle Management experience. He is contributor of Jenkins CI project (www.jenkins-ci.org), Gerrit code-review (http://code.google.com/p/gerrit/) and co-founder of the Mobile Client project for Jenkins CI (http://www.jenkins-ci.mobi).

    Luca is an enthusiast developer and contributor of Git and Gerrit; fuelled innovation in large enterprises in Northern Europe and Canada by introducing them in the company code-lifecycle alongside with tools and technologies.

    He moved to London UK and founded his own company (http://www.lmitsoftware.com) to actively support all the technologies behind Agile ALM, from SCM, issue-tracking, continuous integration and code-review.



  • Jakub Nabrdalik

    Jakub is a Solution Architect at TouK, which means completely nothing except that he jumps into all the roles in software development: from answering RFPs, analyzing requirements, leading teams, to his favorite: programming. As he does almost everything in the process of software development, he is equally bad at everything. Because he's not too smart and he has hard times understanding anything complex, he prides himself on writing simple, readable and maintainable code, something other folks call „craftsmanship” (not to be mistaken with „crapmanship”). You can meet him at Agile Warsaw, Warsaw Java User Group or find his blog at blog.solidcraft.eu.

  • Barry O'Reilly

    Barry started out as a developer working in startups using Agile and Lean practices and principles. Overtime his interest has led walk from the keyboard towards consulting and project delivery. He have worked for a number of companies in the US, UK, Australia and Ireland and is now based in London with ThoughtWorks.

  • Jarosław Pałka

    Jarek spent last 10 years of his life in IT working as database and system administrator, developer, architect, manager and "on site disaster engineer ". He was involved in small, medium and horribly and nonsense large systems, from "waterfall" through Agile to "no methodology" methodology. It all lead him to conclusion that it doesn't matter what you do as long as you do it right, keep it simple and use the right tool to do the job for you. In the meantime he fell in love it TDD, Software Craftmanship and beautiful and simple ideas like REST, JavaScript and NOSQL. From time to time you can hear his low quality jokes about architecture on conferences in Poland. He is trying to make a world a better place as member of SSEEP and blog author at http://primitive.jogger.pl.

  • Maciej Próchniak

    Long time ago Maciek was doing algebraic topology, struggling hard to compute some crazy homotopy inverse limits of contravariant functors of group cohomologies (or sth like that). Then he joined TouK and started to dabble with SOA, Drools, Servicemix, OSGI, Camel, Activiti and other "enterprisey" stuff. Currently he spends some time doing more frontend development and hopes to get back to his functional programming roots: ML, currying, functors and other pleasant things. Meanwhile he struggles to test things that are more often than not regarded as "untestable": starting from BPEL, through GWT to Javascript.

  • Simon Ritter

    Simon Ritter is a Java Technology Evangelist at Oracle Corporation. 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.

    Originally working in the area of UNIX development for AT&T UNIX System Labs and then Novell, Simon moved to Sun in 1996. At this time he started working with Java technology and has spent time working both in Java technology development and consultancy. Having moved to Oracle as part of the Sun acquisition he now specialises in looking at emerging technologies including cloud computing, wireless sensor networks, and gestural interfaces.

  • Toomas Römer

    Toomas is the co-founder of ZeroTurnaround and an hackepreneur. Once a Linux junkie, he was fooled by Apple into proprietory OS and devices. He is a big fan of JUGs, OSS communities and beer. He blogs at dow.ngra.de, tweets from @toomasr and also runs the chesspastebin.com website. In his spare time he crashes Lexuses while test driving them, plays chess, Go and Starcraft. Looks can fool you; he will probably beat you in Squash.

  • Wolf Schlegel

    Wolf is a professionally qualified software engineer with over 18 years of international consulting experience. He has worked throughout the software lifecycle as a software engineer, software systems architect, team lead, business analyst and enterprise IT architect delivering major software systems. His primary professional interests are continuous delivery and devops, software architecture, software development methodologies and test automation. Wolf also has a strong interest in business processes and domain modelling with a special focus on the mobile telecommunication domain. Besides telecommunications, Wolf has worked across several industries, such as finance and insurance, the public sector and the steel industry.

  • Nathaniel Schutta

    Nathaniel T. Schutta is a senior software engineer focussed on making usable applications. A proponent of polyglot programming, Nate has written two books on Ajax and speaks regularly at various worldwide conferences, No Fluff Just Stuff symposia, universities, and Java user groups. In addition to his day job, Nate is an adjunct professor at the University of Minnesota where he teaches students to embrace dynamic languages.

  • Wojciech Seliga

    Wojciech Seliga is a seasoned software developer. Except for coding for about 30 years, he has been responsible for fostering agile practices, managing and staffing software projects, business development and mentoring.

    Currently he runs agile and Atlassian consulting business in the company he co-founded – SPARTEZ. Besides working on Atlassian JIRA on a daily basis, Wojciech contributed to several open source projects and is an author of ScreenSnipe – a commercial screenshotting tool sold globally.

    Wojciech was presenting at several international conferences including Devoxx, Agile, AgileEE, EclipseCon, AtlasCamp, Javarsovia, 33rd Degree, AgileByExample and smaller technical/business events in Poland and abroad.

  • Mariusz Sieraczkiewicz

    Has been a software professional for more than 8 years. Passionate about learning from experience especially when dealing with real-life software projects. As a trainer and consultant works with top Polish teams on process agility, clean code, architecture and effective software practices. Co-conducts in-depth researches on critical success factors in software development. At top of that Mariusz has published dozens of articles in Software Developer Journal.

    His motto is “In most cases it’s all about people” what drives his focus towards communication and team members cooperation. Domain experience: Telco, Finances, Insurance, Manufacturing, E-commerce.

    His thoughts can be followed on twitter @ms_bnsit_pl or his blog http://msieraczkiewicz.blogspot.com.

  • Frederic Simon

    JFrog Ltd co-founder in 2008, and of AlphaCSP in 1998.

    My development experience goes back to 1992 around early Video encoding and server. I'm a Java (SE and EE) architect and consultant since 1999.

    Since 2006, JFrog is serving the Java community with its flagship open source software Artifactory and its ecosystem plugins.

    JFrog products support the build and Application Lifecycle Management (ALM) of all kind of software projects.

    My personal open source activities are:

    - The realistic sky rendering stellarium4Java.sourceforge.net

    - And the Java 7 playground project kijaro.dev.java.net where I implemented the "abstract enum" language change

  • Ken Sipe

    Ken has been a practitioner and instructor of RUP since the late 1990s, and an extreme programmer and coach since the middle 2000s. Ken has worked with Fortune 500 companies to small startups in the roles of developer, designer, application architect and enterprise architect. Ken's current focus is on enterprise system automation and continuous delivery systems.

    Ken is an international speaker on the subject of software engineering speaking at conferences such as JavaOne, JavaZone, Jax-India, and The Strange Loop. He is a regular speaker with NFJS where he is best known for his architecture and security hacking talks. In 2009, Ken was honored by being awarded the JavaOne Rockstar Award at JavaOne in SF, California and the JavaZone Rockstar Award at JavaZone in Oslo, Norway as the top ranked speaker.

  • Sławomir Sobótka

    Hands-on systems designer, head coach at Bottega IT Solutions specialized in Enterprise Java technologies and effective utilization of modern software engineering techniques. He is interested in wide spectrum of software engineering: web systems architectures, business modeling, patterns and agile methodics.

    As a hobby he is keen on psychology and cognitive science.

    In his spare time he participates in community as a president of Polish Software Engineering Professionals Association, lider of the Lublin Java User Group, publisher, speaker and blogger.

  • Multiple Speakers

    Multiple Speakers

  • Venkat Subramaniam

    Dr. Venkat Subramaniam, founder of Agile Developer, Inc., has trained and mentored thousands of software developers in the US, Canada, Europe, and Asia. Venkat helps his clients effectively apply and succeed with agile practices on their software projects, and speaks frequently at international conferences and user groups. He is author of ".NET Gotchas," coauthor of 2007 Jolt Productivity Award winning "Practices of an Agile Developer," author of "Programming Groovy: Dynamic Productivity for the Java Developer" and "Programming Scala: Tackle Multi-Core Complexity on the Java Virtual Machine" (Pragmatic Bookshelf).

  • Manik Surtani

    Manik Surtani is a core R&D engineer at JBoss, a division of Red Hat. He is the founder of the Infinispan project, which he currently leads. He is also the spec lead of JSR 347 (Data Grids for the Java Platform), and represents Red Hat on the Expert Group of JSR 107 (Temporary caching for Java). His interests lie in cloud and distributed computing, autonomous systems and highly available computing. He has a background in artificial intelligence and neural networks, a field he left behind when he moved from academic circles to the commercial world. Since then, he's been working with Java-related technologies, first for a startup focusing on knowledge management and information exchange, and later for a large London-based consultancy as a tech lead focused on e-commerce applications on large Java EE and peer-to-peer technology. Surtani is a strong proponent of open source development methodologies, ethos, and collaborative processes, and has been involved in open source since his first forays into computing.

  • Lars Vogel

    Lars Vogel maintains the website vogella.de with many Android and Eclipse related tutorials and with more then 35 000 daily visitors.

    He works as an independent Android and Eclipse consultant and trainer and as an employee of SAP AG in the role of a product owner and Android developer. He is a regular speaker at international conferences, as for example EclipseCon, Devoxx, Droidcon and O'Reilly's Android Open. Lars received 2010 the "Eclipse Top Contributor Award".

  • Rafał Wasielewski

    Software Engineer at TouK. Scala programming language enthusiast. GIS maniac. He spent an about 3 years as Java/Scala Lead Developer at building from scratch GIS system with thin clients on iOS and Andriod plaforms where he experienced concurrency performance problems, multi-threaded complexity.

    Then in 2009 he heard about Scala and Akka it changed whole concept and approach.

    In our application main idea was to make turn-by-turn navigation combined with social navigation (connected drivers) and mobile "CB Radio" voice communication geo-tagged. Focused on solving everyday problems of commutters. It works based on OpenStreetMap. Neo4j experienced user - GIS is whole about graph so storage is natural in modern graph databases.

    Holds SCJP, SCWCD, SCBCD certificates and more…

    Now he start trying to expand Polish Scala Community.

    Website: http://scala.net.pl

  • Mike West

    Mike is a philosophy student cleverly disguised as a developer advocate on the Chrome team in Munich, Germany. Since it was relatively clear early on that it would be slightly more than difficult to make a living sitting under a tree while reading Kant, he's focused his energies on the web, which happily has proven itself to be a wonderful decision. He's a Chromium committer, and has worked as a web developer at companies like Yahoo! and the Süddeutsche Zeitung.



  • Simon Willnauer

    Simon Willnauer is the Apache Lucene PMC Chair, a Lucene core committer and Apache Software Foundation Member. He has been involved with Lucene and Solr since 2006 and has contributed to several other open source projects within and without the Apache Software Foundation. During the last couple of years he worked on design and implementation of scalable software systems and search infrastructure. His main interests are performance optimizations and concurrency. He studied Computer Science at the University of Applied Sciene Berlin. He is a member of technical staff at SearchWorkings and a co-founder of the BerlinBuzzwords conference on Scalability in June 2012 in Berlin (Germany).

  • Patrycja Węgrzynowicz

    Patrycja Wegrzynowicz is a software visionary and expert specialized in automated software engineering and Java technologies. She is the founder and CTO of Yonita, Inc., a California-based start-up with focus on automated detection and refactoring of software defects, including security vulnerabilities, performance and concurrency anti-patterns, and database issues.

    She is also associated with Warsaw University of Technology, where she serves as Technical Manager of Passim/Synat, an intelligent search platform. Patrycja is finalizing PhD in Computer Science at University of Warsaw. She is a regular speaker at major academic as well as industrial conferences, including JavaOne, Devoxx, JavaZone, Jazoon, OOPSLA, ASE, and others.

    Patrycja’s interests focus on patterns and anti-patterns in software along with automated software engineering, particularly static and dynamic analysis techniques to support program verification, comprehension, and optimization.

    You can follow her on Twitter at @yonlabs.

  • Tomasz de Jastrzebiec Wykowski

    Tomasz is an independent Agile trainer and coach at ProCognita. He has technical background with experience of working in software projects as developer, configuration manager, quality engineer and project manager. In his projects Tomasz has successfully implemented Agile and Lean culture, utilizing best practices of Scrum, Extreme Programming and Kanban. He's coordinated multinational, multicultural and distributed teams. Owned certificates of Project Management Professional (PMP) and Certified Scrum Professional (CSP) allow him to effectively combine traditional techniques with adaptive approach, and select processes and tools that best suits organizations’ needs. Tomasz studies human factor of software development, analyzing how people and their interactions impact the way we make products and how to employ this knowledge to deliver better solutions. He’s always eager to share his knowledge and learn something new by organizing and actively participating in international events and conferences.