• Aleksander Radovan

    HUJAK, King ICT

    Aleksander Radovan (HUJAK & KING ICT) – graduated from the Faculty of Electrical Engineering and Computer Science and is currently finishing the PhD program. He is in the Java more than 14 years. He works for KING ICT as Java team lead and besides he teaches at several universities in and around Zagreb courses related to programming in Java and information systems in general. He is also interested in areas such as artificial intelligence, genetic algorithms, robotics and teaching the younger generation programming.

  • Branko Mihaljević

    HUJAK / RIT Croatia

    Dr. sc. Branko Mihaljević (HUJAK & RIT Croatia) – IT educator, consultant, manager, and entrepreneur. After 12 years of work at FER, where he received MSc, DSM, and PhD, and 7 years as a co-owner of Java development company, he is currently working as a Senior Lecturer at RIT Croatia and leading his own software consulting company for 5 years. He deals with Java since 1996. He is an author of many scientific and professional papers, magazine articles, and educational materials, and he participates in numerous conferences. He gained his work experience as an IT consultant, project manager, development leader, software architect, and researcher on various IT projects in financial, telecom, public health and satellite systems sector. He is also the president of Croatian Java User Association (HUJAK).

  • Dalibor Topic

    Principal Product Manager in Java Platform Group @ Oracle

    Dalibor Topic lives in Hamburg, Germany, and works as Principal Product Manager for Oracle. He joined the OpenJDK project in order to help make it a successful open source project, and stayed for anchoring Java in Linux distributions, and as an all around Java F/OSS community guy. He joined the Java strategy team at Oracle to help provide community feedback into the long-term strategy planning.

  • Hrvoje Ruhek

    Head of Quality Engineering

    Last 20 years Hrvoje lives from typing SQL, Java and Python code.

  • Ioannis Kolaxis

    Software Engineer @ Atos

    Ioannis Kolaxis is a Software Engineer at Atos Greece, developing innovative software products for Unified Communication and Collaboration (UCC). He is a speaker at local meetups, such as the Java Hellenic User Group (Athens, Greece), and Thessaloniki Java Meetup (Thessaloniki, Greece). He frequently writes articles on LinkedIn and Developer Zone, focusing on Software Engineering topics, like Java and Software Quality. He participates in the Internet Engineering Task Force (IETF). He is certified as a European Professional Engineer (EUR ING), and a Professional Scrum Master (PSM I). In 2017, he was awarded by Atos with the title of "Senior Digital Expert", as a recognition of his technical expertise and professional accomplishments.

  • Ivan Krnić

    Head of Software Development and Technical Presales at CROZ

    Ivan is Head of Software Development and Technical Presales at CROZ. As a developer and project manager, he has witnessed both good and bad. He hasn't invented electricity nor penicillin but nevertheless still hopes to change the world as agile coach, helping organizations to work smarter. Hopeless sucker for startup ideas. Likes surfing (in sea) and running (off-road). His secret superpowers include fixing remote controls and assembling IKEA furniture.

  • Ivica Puljak

    Professor at University of Split

    Ivica Puljak is Professor of physics at University of Split, Faculty of electrical engineering, mechanical engineering and naval architecture (FESB). He obtained PhD from University Pierre and Maire Curie in Paris in 2000, while working at Laboratory Leprince Ringuet (LLR) at Ecole polytechnique, Palaiseau. He was head of Department of mathematics and physics, head of Chair of physics and Vice-Dean for Science and Informatics at FESB, member of Board of governors of Institute Rudjer Boskovic in Zagreb and has been awarded with several national and international prizes for science and education. In 2011/2012 he was research associate at CERN and in 2016/2017 distinguished visiting professor at Ecole polytechnique, Palaiseau, France.

    He is a member of CMS collaboration since 1994 and MAGIC collaboration since 2009. His research interests are construction of the electromagnetic calorimeter of the CMS detector, physics of the Higgs boson and astroparticle physics.

  • Jamie Coleman


    I am software developer and Evangelist for WebSphere Application Server and Open Liberty based at IBM’s R&D Laboratory in Hursley, UK. I am subject matter expert in Docker and take a keen interest in emerging technologies with experience in Maven, git, Jenkins and microservice architecture. I have worked on a wide variety of projects such as modernising the CICS mainframe testing infrastructure, creating and automating the creation of Docker images for WebSphere, contributing to the microservice Builder offering and creating web applications for events at the Lab.

  • Mario Kušek

    University of Zagreb, Faculty of Electrical Engineering and Computing, Full Professor

    Mario Kusek is an Full Professor at the University of Zagreb, Faculty of Electrical Engineering and Computing, Croatia. He holds an the Ph.D. degree (2005) in electrical engineering, major in telecommunications and informatics, from the University of Zagreb. He is currently lecturer of 9 courses and has supervised over 130 students at B.Sc, M.Sc. and Ph.D. studies. He participated in two scientific projects financed by the Ministry of Science, Education and Sports of the Republic of Croatia, two EU COST actions, one bilateral project with The Telecommunications Research Center Vienna (FTW) and he led research projects funded by companies Ericsson Nikola Tesla, Kate-Kom and Agrokor. He has coauthored over 80 papers in journals, conference proceedings and books in the area of distributed systems, multi-agent systems, self-organized systems and machine-to-machine (M2M) Communications. Prof. Kušek is a member of IEEE, currently also serving as a Conference coordinator in IEEE Croatia Section, the KES International and the European Telecommunications Standards Institute (ETSI). He serves as a program co-chair on two international conferences and technical reviewer for various international journals and conferences. He is using Java since 1995, developing various applications and teaching programming courses.

  • Marko Lukša

    Software Engineer, Red Hat

    Marko Lukša is a software engineer at Red Hat, working on Istio, Kubernetes and related technologies. He is also the author of the book “Kubernetes in Action” (Manning, 2017).

  • Matija Dujmović

    Java Developer - Teaching Assistant

    Matija graduated from the Polytechnic of Zagreb with a master’s degree in Information Technologies. He is currently an enterprise application developer at King ICT and a teaching assistant at the Polytechnic of Zagreb and Algebra University College. Interested in technical know-how and delivering functional code. He is a self-proclaimed certification junkie as evidenced by his many Java certificates. He loves learning, teaching and growing together with the developer community.

  • Paolo Carta

    Software Architect and Developer

    Born and grown in the beautiful Sardinia in Italy, I moved to Zurich to complete my studies at the ETH (Swiss Federal Institute of Technology).
    After working on delay tolerant networks with Android devices I focused more on Web development and scalable and resilient software architectures on the cloud.
    Currently working as a Freelancer at Interdiscount, the market leader for electronics in Switzerland.

  • Pavao Varela Petrac

    ecx.io an IBM company

    Studied Intelligent transport systems in Zagreb and Vienna. On-site consultant for Lufthansa and AGCO corp. Developed projects for Raiffeisen bank, Intesa Sanpaolo bank, Henkel and Metlife.

  • Rafael del Nero

    Java Champion

    Rafael Del Nero is a Java Champion, creator of NoBugsProject and quiz master in Oracle Dev Gym, is the author of "No Bugs, No Stress - Create a Life-Changing Software Without Destroying Your Life." Rafael believes there are many techniques involved in creating high-quality software that developers are often unaware of. His life's purpose is to help Java developers use better programming practices to code quality software for stress-free projects with fewer bugs.

  • Stewart X Addison 🇪🇺

    AdoptOoenJDK development/sysadmin and common sense advocate

    IBMer working on Open Source software for the Runtime Technologies team. Passionate about engaging with communities and making technology work for people. Background mostly in UNIX but have a strong interest in inclusivity of platforms and making things run everywhere.

  • Adnan Isajbegovic

    Clean Coder

    Adnan Isajbegovic, graduated Theoretical Computer Science at Faculty of Natural Science and Mathematics in Sarajevo, is Senior Software Engineer at Tacta with 6 years experience in Java enterprise world. He mostly works on improving, optimizing and scaling Data Access Layer REST web services and data analytic platforms.

  • Ana Baotić

    Asseco SEE, PM

    During college she focused on various e-learning projects and plagiarism detection. After getting her Masters degree in CS, she started developing for Android, working on various projects in the telecommunication, medical and travel industry. After switching to mobile banking and security, in 2016 she took the role of Technical Manager of Mobile banking. She is currently working as a PM at Asseco SEE. In addition to coding, she loves organising workshops and working directly with clients, helping to close the gap between the technical and practical in the mobile industry.

    Apart from coding and public speaking, she enjoys spending time with her family and traveling.

  • Darko Jureković

    Oracle Academy

    Born to learn, but enjoys teaching too. ;-)

  • Ivor Baric

    RIT Croatia

    An IT student currently enrolled at RIT Croatia's WMC program. His interests involve software development and architecture - specifically AI/machine learning. Currently alongside his studies he's working on a research regarding a system capable of predicting air pollutant parameters in urban areas like "Zagreb".

  • Josip Pojatina

    Performatune d.o.o., Oracle & Open Source Performance Tuning Expert and Technical Solution Architect

    After finishing Mathematical secondary school (MIOC) and ETF (Faculty of Electrical Engineering and Computing) in Zagreb, my first significant project was implementation of Mathematical programming model (Revised Simplex method) in order to solve optimal production scheduling problem. Later I've been applying similar methods from Operations Research and Management Science, Statistics and Neural networks to optimize critical business processes (supply chain optimization, forecasting, financial and inventory tuning...). More than 2 decades has passed from time when I started to use Oracle, and little bit later Linux and others Open Source technologies. That experience allowed me to become technical solution architect most demanding European databases, helping some of the Global Fortune 100 companies to improve their operations. I'm also regular speaker at OUG (Oracle User Group) and member of Europen High Performance Computing society. My two websites (www.josip-pojatina.com & www.performatune.com) are among Top 100 Oracle Blogs and Websites for Oracle DBAs to follow in 2019 (https://blog.feedspot.com/oracle_blogs).

  • Jurica Krizanic

    Lean Java Expert at ComSysto Reply

    Jurica Križanić is a software developer with 10+ years of experience in several industries. He is currently working as a Lean Java Expert at Comsysto Reply from Zagreb, although Comsysto Reply and the clients are originally located in Munich, Germany. He is interested in Java, Spring, but also in CI/CD, as well as lean development, agile frameworks and remote work.

  • Ladislav Mačkala

    Head of IT Department

    20+ years of experience in Java programming, software engineering, leading development teams and managing IT departments. Last 8 years worked on developing CRM for medical tourism and managing all aspects of IT business in leading dental tourism clinic in Zagreb.

  • Many Speakers

    Sponsors of Javantura and Friends of HUJAK

    Not enough place for CVs ;-)

  • Marija Malkoč Kušt

    Comsysto Reply

    Marija Malkoč Kušt is a full stack developer with a strong interest for best practices and continuous improvement, especially in the area of agile / lean development and remote work. She has been working for several years with local teams before starting to work for Comsysto Reply three years ago in multicultural semi-distributed teams. Professional constants in her life are Java, Spring and JavaScript.

  • Marko Elezovic

    Head of Technology at Oradian, working on spreading financial inclusion to the bottom billions.

    Leading the tech teams of Oradian through the fascinating and turbulent world of financial inclusion.
    Experienced in developing fintech solutions and organizing meetups. Likes to wave arms when talking to crowds.
    Scala aficionado, but will try to create art out of anything that compiles or interprets.
    Manager by day, dad by afternoon, programmer by wee hours - sleep is for mortals.

  • Martin Grmek

    Software Architect

    During college, Martin's main interests were security and root-kits. After getting his Masters degree in Computer science, he has accrued over 10 years in Java development, with greatest focus on mobile in the fintech sector.Software architect on key ASSECO SEE products used by over millon end users in the region. Currently leading team on the newest cutting-edge solutions for fast growing financial business. In his free time, he enjoys traveling and spending time with wife and two sons.

  • Matea Pejčinović

    Software Engineer at Asseco SEE Croatia

    I am a software engineer in one of the leading companies in banking sector in South-Eastern Europe-Asseco SEE. I graduated magna cum laude from Faculty of Electrical Engineering and Computing in 2016 with Masters degree in Computer Science. During my studies I’ve gained interest in algorithmic approach to problem solving. My primary focus is on developing enterprise software solutions using Java technologies in fintech sector, as well as sharing knowledge. In my free time, I enjoy travelling and learning new languages.

  • Matej Vidaković

    Android developer at Microblink

    Android developer and Kotlin fan, currently working at Microblink.

  • Matija Šipek

    RIT Croatia

    Matija Šipek is a student at the Rochester Institute of Technology Croatia (RIT Croatia), majoring in Information Technology with a concentration in Web and Mobile Computing and application development. His interests are in the core of programming languages, software architecture, and compiler optimizations. He is currently working on GraalVM research, and his professional interests also include blockchain and cybersecurity. Also, he is working as a Junior Developer in CS Computer Systems.

  • Miro Svrtan


    Veteran of PHP affairs, BDD practitioner, devops enthusiast
    I started using PHP as a student, back in 1999. At first I worked as a one man band web developer and from there I progressed, via focusing on PHP development in a team environment, to be a senior dev, tech lead & technical analyst.
    I found much more happiness doing backend stuff so I focus on scalable backends and devops tasks this days.

  • Miroslav Čerkez


    Proactive, experienced software developer. During his 10 years in the IT industry he has roles in design, development, deployment, systems analysis, testing and optimization applying different technologies on number of projects from various business domains.

  • Paula Pufek

    RIT Croatia

    Paula Pufek is a student at the Rochester Institute of Technology Croatia (RIT Croatia), where she studies Information Technology with a concentration in Web and Mobile Computing. She is interested in software development as well as software architecture, and currently, she is working on a research about Automatic Memory Management and Garbage Collection algorithms in Java, including new Parallel Full G1 GC, the Z GC, and Shenandoah GC. Her other interests are web application development and user interface design, and she attends software development conference as much as she can.

  • Tomislav Klišanić

    Software Development Consultant @ CROZ

    Tomislav is software development consultant at CROZ. He has always been an all-rounder, a developer with strong interest in how systems work under the hood. Later he discovered that his calling actually has a name, DevOps! He still develops various software solutions, but is also part of CROZ DevOps team that makes magic and automates whatever comes its way.

  • Vjori Hoxha

    RIT Croatia

    Vjori Hoxha is an Information Technology student with a concentration in Web and Mobile Computing in RIT Croatia. His interests are currently about Software Development and using Software & Artificial Intelligence together to solve real world problems. Currently, he's a teaching assistant (tutor) for Java 2 course at his college. Alongside his studies he's working on a research regarding tsunami prediction in specific area like French Polynesia using supervised neural networks.

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