Giliam Breems is a Senior Oracle APEX Consultant at Qualogy with more than 20 years of experience in the Oracle Database (SQL and PLSQL) and is now-a-days specialised in Oracle APEX. He became an Oracle ACE member in 2023, has been a member of the APEX World committee (nlOUG), organizes meetups for the company and is a speaker on national and international conferences (APEX World, HrOUG, POUG, DOAG, Kscope, OUGN, APEX Connect, APEX Alpe Adria and the APEX Latinoamérica Tour).

Giliam Breems is a Senior Oracle APEX Consultant at Qualogy with more than 20 years of experience in the Oracle Database (SQL and PLSQL) and is now-a-days specialised in Oracle APEX. He became an Oracle ACE member in 2023, has been a member of the AP... Show more

Neil has been working in IT since 1988 when he coded Assembler and Cobol on IBM Mainframes against both hierarchical (NoSQL-ish) and relational databases. He started using Oracle software in 1991. Neil is an Oracle ACE Director and a founding member of the MASH Program. He likes to drink strong smooth Italian coffee, good beer and better whisky, depending upon the time of day.

Neil has been working in IT since 1988 when he coded Assembler and Cobol on IBM Mainframes against both hierarchical (NoSQL-ish) and relational databases. He started using Oracle software in 1991. Neil is an Oracle ACE Director and a founding member ... Show more

Richard Fichtner is the Principal Software Architect at XDEV Software GmbH, with over 20 years of experience in the software industry. He works at the intersection of business and technology and is a strong advocate for best practices in modern Java development. Richard is passionate about sharing knowledge on Java technologies, making him a frequent and highly rated conference speaker.

He is the founder and leader of the Java User Group Oberpfalz and co-organizes the JCON conferences. JCON EUROPE brings together the worldwide Java community from more than 60 countries.
Richard has been recognized as a Java Champion, Oracle ACE Pro, IBM Champion, and Vaadin Champion. With a Master of Science in Applied Computer Science, his expertise spans Java, clean code, pragmatic development practices, and European data privacy, helping organizations build modern, maintainable software.

In his spare time, Richard enjoys relaxing by a campfire and listening to or playing country music.

Richard Fichtner is the Principal Software Architect at XDEV Software GmbH, with over 20 years of experience in the software industry. He works at the intersection of business and technology and is a strong advocate for best practices in modern Java ... Show more

Gary Gordhamer has dedicated his professional career to exploring the enterprise application landscape and the digitization of business processes. Over the past three decades, he has gained extensive technical expertise in Oracle database, e-Business suite, middleware, and related technologies. His professional background encompasses a diverse range of industries, including healthcare, finance, manufacturing, utilities, and government. Gary is an Oracle ACE Director and is a frequent presenter at Oracle Conferences. Additionally, he is the author of “Oracle Database Performance Tuning: Pocket Solution Guide Series For Upgrading Oracle Databases.”

Gary Gordhamer has dedicated his professional career to exploring the enterprise application landscape and the digitization of business processes. Over the past three decades, he has gained extensive technical expertise in Oracle database, e-Business... Show more

Patrick Baumgartner is a Java Champion, passionate software crafter, and technical agile coach at 42talents. He helps teams build elegant, simple, and robust solutions, specializing in cloud software with Java, the Spring ecosystem, and other open-source technologies.

Patrick is an active member of the Software Craft, Java, and Agile communities in Switzerland. As a trainer and coach, he focuses on making a real impact by sharing knowledge, experimenting, and fostering continuous improvement. He enjoys learning with and from others.

Patrick Baumgartner is a Java Champion, passionate software crafter, and technical agile coach at 42talents. He helps teams build elegant, simple, and robust solutions, specializing in cloud software with Java, the Spring ecosystem, and other open-so... Show more

Aicha Laafia, a Java software engineer at SQLI with a love for coding, an interest in sustainability, and a commitment to empowering women in tech.

I am a Women Techmakers and Girls Code ambassador, an Oracle ACE Associate, a member of the Moroccan Association of Computing Science, and part of the JetBrains Community Contributor program.

I focus on creating software with minimal environmental impact while mentoring and supporting women in technology.

When I’m not coding, I enjoy exploring delicious food, phone photography, and watching Formula 1.

Aicha Laafia, a Java software engineer at SQLI with a love for coding, an interest in sustainability, and a commitment to empowering women in tech. I am a Women Techmakers and Girls Code ambassador, an Oracle ACE Associate, a member of the Morocca... Show more

Simon Martinelli is a Java Champion, Vaadin Champion, and Oracle ACE Pro with over three decades of experience as a software architect, developer, consultant, and trainer. He is the creator of the AI Unified Process (AIUP) and a strong advocate of Spec-Driven Development.
As the owner of Martinelli LLC, he coaches teams to get up to speed with AI-driven development. He regularly shares his insights through international conferences, articles, and his blog, Keep IT Simple (https://martinelli.ch), where he writes about AI, architecture, and modern Java development.
He is also a lecturer at two universities in Switzerland, where he teaches software architecture, persistence, DevOps, and cloud-native development.

Simon Martinelli is a Java Champion, Vaadin Champion, and Oracle ACE Pro with over three decades of experience as a software architect, developer, consultant, and trainer. He is the creator of the AI Unified Process (AIUP) and a strong advocate of Sp... Show more

Richard Martens has been involved in information technology for more than 20 years. He started as a web developer using the Oracle database as no more than data storage. Richard has been responsible for major European multilingual websites and has been working with the Oracle database since 2000. During those years, he developed himself using a multitude of technologies and specialised in PL/SQL and Oracle APEX. Richard has been working primarily with PLSQL and APEX since 2005. With APEX, he combines the things he loves most: the Oracle database and web technologies.

Richard Martens has been involved in information technology for more than 20 years. He started as a web developer using the Oracle database as no more than data storage. Richard has been responsible for major European multilingual websites and has be... Show more

Brian Vermeer is a Staff Developer Advocate at Snyk and a respected authority in Java and secure software development. He is an internationally recognized Java Champion and Oracle ACE Pro, honored for his outstanding contributions to Java and open source advocacy.
With over 15 years of hands-on software engineering experience, Brian specializes in Java, cybersecurity, and AI. He has authored numerous articles on this and has contributed to a wide range of open source projects within the ecosystem.
Brian is an active developer community leader, serving as a JUG leader for both the NLJUG and VirtualJUG, co-leading DevSecCon, and conference organizer for J-Fall and J-Spring. He is also a frequent speaker at leading international conferences, including JavaOne, Devoxx, and Devnexus.
Beyond his professional work in technology, Brian serves as a reservist in the Royal Netherlands Air Force in the rank of Captain and is a Taekwondo Master and instructor.

Brian Vermeer is a Staff Developer Advocate at Snyk and a respected authority in Java and secure software development. He is an internationally recognized Java Champion and Oracle ACE Pro, honored for his outstanding contributions to Java and open so... Show more

Oren Nakdimon is an Oracle ACE Director with 30+ years of extensive and continuous experience with Oracle-based systems, as a developer, DBA, manager and instructor. Oren gained lots of knowledge about databases in general, and Oracle in particular, and likes sharing it - by blogging, tweeting, presenting in local and international conferences, and more.
He is the database architect of Moovit, where he has been working since 2012.

Oren Nakdimon is an Oracle ACE Director with 30+ years of extensive and continuous experience with Oracle-based systems, as a developer, DBA, manager and instructor. Oren gained lots of knowledge about databases in general, and Oracle in particular, ... Show more

Ivar Grimstad is the Jakarta EE Developer Advocate at Eclipse Foundation. He is a Norwegian Java Champion and JUG Leader based in Sweden.

Besides advocating the Jakarta EE technologies, Ivar is contributing to the Jakarta EE specifications as well as being the PMC Lead for Eclipse Enterprise for Java (EE4J). He is also one of the specification leads for Jakarta MVC and represents Eclipse Foundation on the JCP Executive Committee.

Ivar is also involved in a wide range of other open-source projects and communities. He is a frequent speaker at International developer conferences.

Ivar Grimstad is the Jakarta EE Developer Advocate at Eclipse Foundation. He is a Norwegian Java Champion and JUG Leader based in Sweden. Besides advocating the Jakarta EE technologies, Ivar is contributing to the Jakarta EE specifications as well... Show more

Merlin is a Migration Engineer at Moderne and a certified flight instructor two roles with the same methodology: preparation over improvisation, checklists over hope, and a safe landing is always the goal.

With 13+ years in Java and enterprise architecture, he helps organizations turn large-scale code migrations from risky adventures into routine operations using OpenRewrite for reproducible, recipe-driven transformations across hundreds of repositories.

An Oracle ACE Associate and Javaland 2024 Top Speaker, Merlin has delivered 30+ talks at conferences including Devoxx, JFokus, OOP, and Javaland. He co-organizes JUG Dortmund and writes for JAVA PRO, Java Magazin, and Java Spektrum.

Merlin is a Migration Engineer at Moderne and a certified flight instructor two roles with the same methodology: preparation over improvisation, checklists over hope, and a safe landing is always the goal. With 13+ years in Java and enterprise arc... Show more

Certified AI Wrangler, Oracle ACE Associate, Microsoft MVP, Docker Captain and passionate Java developer. Johannes builds modern applications with Vaadin, Spring, Quarkus, Kubernetes, and Langchain4j, often exploring AI integration. Public speaker, Live-Coder and open-source enthusiast. Proud husband and father of three.

Certified AI Wrangler, Oracle ACE Associate, Microsoft MVP, Docker Captain and passionate Java developer. Johannes builds modern applications with Vaadin, Spring, Quarkus, Kubernetes, and Langchain4j, often exploring AI integration. Public speaker, L... Show more

Andrej Pashchenko started his IT career in the early 1990s and has been working with Oracle Database since 1999. Over the past 15 years, he has focused on consulting, supporting customer projects in the areas of data warehousing, data modeling, ETL, and SQL performance. He has been actively sharing his knowledge since 2011 through blogging, speaking at international conferences, and teaching, helping others get the best out of Oracle Database. For his technical expertise and his long-standing commitment to knowledge sharing, Oracle has recognized him as an Oracle ACE Pro.

Andrej Pashchenko started his IT career in the early 1990s and has been working with Oracle Database since 1999. Over the past 15 years, he has focused on consulting, supporting customer projects in the areas of data warehousing, data modeling, ETL, ... Show more

Passionate OCI professional and Oracle Apps engineer. Working for a few years with Oracle products and I always try to get the best out it!

Focusing on networking and security and helping with migrations of workloads to OCI or implementing applications to OCI. Designing, building and maintaining tenants.

With that comes experience and knowledge that I am sharing with the community.

Passionate OCI professional and Oracle Apps engineer. Working for a few years with Oracle products and I always try to get the best out it! Focusing on networking and security and helping with migrations of workloads to OCI or implementing applica... Show more

Kim Berg Hansen is a database developer from Middelfart in Denmark. Originally wanting to work with electronics, he almost coincidentally tried computer programming and discovered where his talent lay, as the programs he did worked well – unlike the electronics projects he soldered that often failed. After that experience he progressed from Commodore Basic on VIC-20 over Modula-2 and C at Odense University to Oracle SQL and PL/SQL, which last two languages he now has worked with extensively since the year 2000. His professional passion is to work with data inside the database utilizing the SQL language to the fullest to achieve the best application experience for the users.

Kim shares his experience and knowledge by writing the Practical Oracle SQL book, blogging, presenting at various Oracle User Group conferences, and being the SQL quizmaster at the Oracle Dev Gym. His motivation is when peers go "now I understand" after his explanations, or when end users "can't live without" his application coding. He is certified Oracle OCE in SQL as well as awarded Oracle ACE Director. Outside the coding world Kim is married, loves to cook, and is a card-carrying member of Danish Beer Enthusiasts association.

Kim Berg Hansen is a database developer from Middelfart in Denmark. Originally wanting to work with electronics, he almost coincidentally tried computer programming and discovered where his talent lay, as the programs he did worked well – unlike the ... Show more

Julian Frey is founder of CITE GmbH. During his more than 10 years of consulting he has gained a lot of experience in many areas, especially in the areas of HA, Engineered Systems and Monitoring. He is a frequent speaker and founder of the Oracle Beer Bern Meetup Group. Julian is a member of the Oracle ACE Program as an Oracle ACE Director.

Julian Frey is founder of CITE GmbH. During his more than 10 years of consulting he has gained a lot of experience in many areas, especially in the areas of HA, Engineered Systems and Monitoring. He is a frequent speaker and founder of the Oracle Bee... Show more

Ron Ekins is the Director of Field Solution Architecture for EMEA & LATAM at Everpure, where he serves as the primary technical advisor on data-related discussions. With over 30 years of experience in data management, Ron brings a wealth of expertise in the development, design, and delivery of complex information systems projects. His extensive background is complemented by his notable contributions to the field, including 4 granted US patents related to data security and governance.

An esteemed Oracle ACE Director, Ron is an active and influential member of the global Oracle community and has had the privilege of speaking at numerous prestigious industry conferences around the world.

Ron Ekins is the Director of Field Solution Architecture for EMEA & LATAM at Everpure, where he serves as the primary technical advisor on data-related discussions. With over 30 years of experience in data management, Ron brings a wealth of expertise... Show more

Nicolas Fränkel is a technologist focusing on cloud-native technologies, DevOps, CI/CD pipelines, and system observability. His focus revolves around creating technical content, delivering talks, and engaging with developer communities to promote the adoption of modern software practices. With a strong background in software, he has worked extensively with the JVM, applying his expertise across various industries. In addition to his technical work, he is the author of several books and regularly shares insights through his blog and open-source contributions.

Nicolas Fränkel is a technologist focusing on cloud-native technologies, DevOps, CI/CD pipelines, and system observability. His focus revolves around creating technical content, delivering talks, and engaging with developer communities to promote the... Show more

Biju Thomas is an Oracle ACE Director (since 2015) and a Cloud Technical Solutions Expert leading Data Intensity’s Digital Transformation practice. With a background spanning software development and enterprise database architecture, he brings a practitioner’s perspective to building scalable, production-ready cloud solutions.

Biju specializes in modern data platforms, cloud migrations, and multicloud architectures, helping organizations integrate robust data foundations with hyperscaler ecosystems such as Microsoft Azure. A long-time community contributor and frequent speaker, he focuses on practical patterns that bridge enterprise data platforms with modern AI and application development.

Learn more at www.bijoos.com
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Biju Thomas is an Oracle ACE Director (since 2015) and a Cloud Technical Solutions Expert leading Data Intensity’s Digital Transformation practice. With a background spanning software development and enterprise database architecture, he brings a pr... Show more

Software engineer and team leader with more than a decade of experience in developing and maintaining web applications, with a particular focus on applications written in the Java ecosystem. Neither afraid of working on code, even on code that is already “legacy”, nor of designing a CI/CD processes that streamline development and deployment. Enthusiast of clean, straightforward code that solves business problems effectively, prioritizing readability and simplicity.

Software engineer and team leader with more than a decade of experience in developing and maintaining web applications, with a particular focus on applications written in the Java ecosystem. Neither afraid of working on code, even on code that is alr... Show more

A Data enthusiast more widely interested in Business Analytics/DW/EPM solutions with a special focus on Oracle products and solutions.
Oracle ACE Director, owner of DATAlysis LLC, a consulting company in Switzerland, he has more than 15 years of experience in multiple project roles like architect, analyst, team lead and developer, bridging together the business and the technical side of the BA world.
His other activities include training delivery, R&D, blogging and supporting the Oracle community on the forums and by presenting at multiple events.

A Data enthusiast more widely interested in Business Analytics/DW/EPM solutions with a special focus on Oracle products and solutions. Oracle ACE Director, owner of DATAlysis LLC, a consulting company in Switzerland, he has more than 15 years of ex... Show more

Vincent Vauban is a seasoned Java Fullstack developer with over 15 years of experience 🗓️, specializing in Java, Spring, JavaScript, React, and Angular.

He is deeply committed to helping others grow 🚀 in their software development journey by offering comprehensive courses, practical tutorials, and certification preparation.

Beyond teaching, Vincent fosters collaboration within the developer community 🤝 through meetups, workshops, and online platforms.

A lifelong learner, he holds multiple certifications 📄 and continuously sharpens his skills to stay ahead in the tech world.

Vincent Vauban is a seasoned Java Fullstack developer with over 15 years of experience 🗓️, specializing in Java, Spring, JavaScript, React, and Angular. He is deeply committed to helping others grow 🚀 in their software development journey by off... Show more

Since 2015, Maarten has taken the stage over 70 times at 40+ events across 20 countries, inspiring audiences with his practical insights and passion for technology.

His experience spans:
* Community-driven events: local meetups and Java User Groups;
* Top-tier international conferences: including JavaOne, Devnexus, JavaZone, multiple Devoxx editions, and J-Fall;
* Private engagements: in-house company events and guest lectures at both primary and professional education institutions.

Beyond speaking, Maarten actively shapes the developer and speaking communities. He spent three years on the J-Fall Program Committee, and now mentors upcoming speakers through the NLJUG Speaker Mentoring Programme and Info Support’s internal Speaking Community.

Since 2015, Maarten has taken the stage over 70 times at 40+ events across 20 countries, inspiring audiences with his practical insights and passion for technology. His experience spans: * Community-driven events: local meetups and Java User Gro... Show more

Elias Nogueira is a distinguished software engineer specializing in Quality Engineering, delivering practical hands-on sessions on testing and development practices for backend, frontend, and mobile technologies using Java and open-source solutions.

As a Java Champion and Oracle ACE Pro, he actively contributes to the Java community, advocating for best practices and innovation in testing. As an editor for Java Magazine NL, he helps writers deliver the best content to readers in the Netherlands.

Elias Nogueira is a distinguished software engineer specializing in Quality Engineering, delivering practical hands-on sessions on testing and development practices for backend, frontend, and mobile technologies using Java and open-source solutions. ... Show more

Pavan Madduri is a Senior Cloud Platform Engineer at W.W. Grainger, a CNCF Golden Kubestronaut, and an IEEE Senior Member. Specializing in AI infrastructure and enterprise cloud-native architecture, he builds GPU autoscaling and zero-trust environments for large-scale AI workloads.

Pavan is the creator of the open-source keda-gpu-scaler and an active architectural contributor to core CNCF projects, including Volcano (GPU NUMA-aware scheduling) and Dragonfly (AI model distribution). In addition to his open-source work, he serves as an independent observability and telemetry advisor for commercial AI startups.

As a recognized industry voice on LLMOps, he frequently publishes technical frameworks in trade media such as VKTR, Techstrong, and CNCF.io, and is the author of the upcoming book Agentic AIOps. Pavan regularly presents his architectural designs at major industry events, including the BrightTALK App Security Summit, KyvernoCon, and the Kubeflow Community Showcase

Pavan Madduri is a Senior Cloud Platform Engineer at W.W. Grainger, a CNCF Golden Kubestronaut, and an IEEE Senior Member. Specializing in AI infrastructure and enterprise cloud-native architecture, he builds GPU autoscaling and zero-trust environmen... Show more

Nelson Calero is a senior data engineer with 20+ years of extensive experience in Oracle, PostgreSQL, Google Cloud, and other database technologies. A seasoned presenter and community leader, he shares his insight and expertise on database products at various events globally. Nelson works as a Principal Consultant for Pythian - as the last technical team escalation point handling the Pythian client's most challenging and serious database technical problems.

He is an Oracle ACE Director and Oracle Certified Professional, a member of the Board of the Latin American Oracle User Community (LAOUC), and a leader of the Uruguayan Oracle User Group (UYOUG).

Nelson Calero is a senior data engineer with 20+ years of extensive experience in Oracle, PostgreSQL, Google Cloud, and other database technologies. A seasoned presenter and community leader, he shares his insight and expertise on database products ... Show more

Software Engineer with more than 10 years of experience in Oracle technologies and software development. Throughout his career, he has built a strong background in infrastructure, middleware, and enterprise application development, with expertise in high-availability environments, virtualization, SSL, Oracle Forms and Reports, Linux, and application servers.

Since 2020, he has focused primarily on software development, specializing in Java and Oracle APEX, delivering scalable and business-driven solutions. He is the co-founder of Pura Vida JUG (Costa Rica Java User Group) and the creator of oracle-max.com, where he actively shares technical knowledge and contributes to the Oracle and Java communities.

Recognized as an Oracle ACE Pro, he is passionate about continuous learning, community engagement, and knowledge sharing. He enjoys exploring emerging technologies and helping organizations leverage innovation, with a particular interest in Artificial Intelligence, cloud technologies, and modern software architectures.

Software Engineer with more than 10 years of experience in Oracle technologies and software development. Throughout his career, he has built a strong background in infrastructure, middleware, and enterprise application development, with expertise in ... Show more

Oracle ACE Pro and DBA Team Lead at Abakus Plus, where his team handles proactive maintenance of Oracle databases and their infrastructure.
Co-author of several commercial database tools including APPM (Oracle performance monitoring), Backup Server, and Deja Vu (test & dev provisioning).

On the open-source side, he is the author of DDLFS and ASMFS — two FUSE filesystems that expose Oracle internals as mountable Linux filesystems.

Oracle Certified Professional (DBA and Java SE), with additional certifications in Exadata and OCI.

Regular speaker at Oracle user group conferences in Europe.

Oracle ACE Pro and DBA Team Lead at Abakus Plus, where his team handles proactive maintenance of Oracle databases and their infrastructure. Co-author of several commercial database tools including APPM (Oracle performance monitoring), Backup Server... Show more

Stefan Oehrli is an Oracle ACE Director and Oracle Database Security Architect at Accenture, where he works as a Tech Architecture Manager. A trained electrical engineer, he has worked with Oracle databases since 1998 — first as a DBA and team lead at a major Swiss telecom provider, then for over a decade as a Solution Manager and trainer at Trivadis, now part of Accenture. He specializes in Oracle Database security — Advanced Security, Unified Auditing, Data Safe, encryption, and Oracle Unified Directory — and has secured Oracle environments across Swiss government, telecom, automotive, and insurance. He co-authored the security chapter of Der Oracle DBA (Hanser, 2016), speaks regularly at DOAG, AOUG, SOUG, OUGN, UKOUG, and Oracle CloudWorld / AI World, and maintains an open Oracle security knowledge base at oradba.ch.

Stefan Oehrli is an Oracle ACE Director and Oracle Database Security Architect at Accenture, where he works as a Tech Architecture Manager. A trained electrical engineer, he has worked with Oracle databases since 1998 — first as a DBA and team lead a... Show more