Devnexus 2025


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API Toolbox with Spring

Spencer Gibb

Spencer Gibb is a Software Engineer at Broadcom where he is the co-founder and lead of the Spring Cloud Core projects. His interests include distributed systems, JVM languages, web services frameworks, message-driven architectures and making software development simpler. He has industry experience in early e-commerce platforms, government and non-profit organizations, and business intelligence startups. He has extensive java experience and experience in other languages such as scala and python.

BoxLang - The Future is Dynamic

Luis Majano

Luis Majano is a Computer Engineer, published author, founder, and CEO of Ortus Solutions, Corp (www.ortussolutions.com), a consulting firm specializing in open-source tooling, web development, architecture, and professional open-source. He has been designing and working with software architecture and technologies since the year 2000. He has a passion for learning and mentoring developers so they can succeed with sustainable software practices and the usage and development of open-source software. He is the creator of ColdBox HMVC, ContentBox Modular CMS, TestBox BDD, CommandBox CLI, and over 200 open-source projects. He speaks regularly at several international conferences and you can read his blog at www.luismajano.com.

Containers All the Way Down!: Optimizing Spring Boot apps for the Modern Cloud

Mark Heckler

Mark Heckler, MBA is a software developer & Principal Cloud Developer Advocate for Java/JVM Languages at Microsoft, conference speaker, Java Champion, and Kotlin Developer Expert focused on developing innovative production-ready software at velocity for cloud and edge computing platforms. He has worked with key players in numerous industries and public sector organizations to develop and deliver critical capabilities on time and on budget. Mark is an open source contributor and author of Spring Boot: Up and Running (https://bit.ly/springbootbook) and can be found on Twitter/X @mkheck.

Functional Spring Boot

John Burns

John is a platform engineer at GrubHub where he leads development on JVM service platform engineering. He is a co-organizer of the Chicago Java and Kotlin User Groups. He is also the maintainer of the ktlint-gradle and spring-funk projects.

Mastering Logging in Java

Jeanne Boyarsky

Jeanne Boyarsky is a Java Champion from New York City and has been a Java developer for more than 22 years. She has split her time between development and being a Scrum Master for the last decade. Jeanne has co-authored Wiley's Oracle Java 8 , 11, 17, and 21 certification books along with a new book “Real-World Java: Helping You Navigate the Java Ecosystem”. Jeanne volunteers at CodeRanch and mentors the programmers on a high school robotics team in her free time. She has spoken at numerous conferences including Dev Nexus, QCon, KCDC, and JavaOne.

Victor Grazi

Victor Grazi is SVP at BNY Pershing X. He is a Java Champion, author of several open source projects including the popular Java Concurrent Animated, and coauthor of the book Real World Java-Helping you navigate the Java ecosystem. He serves on the Java Community Process Executive Committee, won an Outstanding Spec Lead award for JSR 354 Java Money and Currency, and has presented on Java-related topics across the globe.

Polyglot Pipelines with Apache Nifi

Bob Paulin

Bob Paulin is a software engineer at Snowflake and speaker that has been developing open source software for the past 20 years. Bob has presented at large international conferences such as ApacheCon, JavaOne and Devnexus. He frequently shares his knowledge and opinions on the Java Pub House and Java Off Heap podcasts. Bob is a passionate member of the ASF and Chicago Java User Group communities. When not coding, Bob enjoys coaching football, and spending time with his wife and 4 kids.

Runtime Efficiencies and Spring Boot

DaShaun Carter

DaShaun is a husband, father of four, volunteer, struggling athlete, former professional cheerleader, Raspberry Pi enthusiast, and Spring Developer Advocate at Broadcom. Deliberately practicing to build, run, and manage, better software, faster.

Spring Batch 5.2 and beyond: What's new and what's coming next

Mahmoud Ben Hassine

Mahmoud is the Lead of Spring Batch at VMware. He is a passionate software engineer with 15 years of experience in enterprise software development. Mahmoud is an open source advocate and has contributed to several open source projects. When he is not coding, Mahmoud enjoys spending time with his family and friends, reading, running and playing chess!

Stream Processing As You’ve Never Seen Before (Seriously): Apache Flink for Java Developers

Viktor Gamov

Viktor Gamov is a Principal Developer Advocate at Confluent, founded by the original creators of Apache Kafka® . With a rich background in implementing and advocating for distributed systems and cloud-native architectures, Viktor excels in open-source technologies. He is passionate about assisting architects, developers, and operators in crafting systems that are not only low in latency and scalable but also highly available. As a Java Champion and an esteemed speaker, Viktor is known for his insightful presentations at top industry events like JavaOne, Devoxx, Kafka Summit, and QCon. His expertise spans distributed systems, real-time data streaming, JVM, and DevOps. Viktor has co-authored "Enterprise Web Development" from O'Reilly and "Apache Kafka® in Action" from Manning.  Follow Viktor on X - @gamussa to stay updated with Viktor's latest thoughts on technology, his gym and food adventures, and insights into open-source and developer advocacy.

Sandon Jacobs

Sandon Jacobs is a Senior Developer Advocate at Confluent based in North Carolina. Sandon has built microservices and event streaming applications in several industries - including television media, energy, mobile advertising, rail freight logistics, and healthcare. This experience spans multiple JVM languages - Java, Scala, Kotlin, Groovy - with smatterings of Python and JavaScript along the way.

The Overwhelmed Spring Developer's Guide To AI

Glenn Renfro

As a VMware engineer, Glenn Renfro is a core committer for Spring Cloud Task, Spring Batch, and Spring Cloud Data Flow and a Java Champion. He has 15 years of experience in designing, building, and delivering enterprise-level applications in Java and 21 years total of software development experience.

Chris Bono

Focused on Spring for Apache Pulsar, Spring Cloud Dataflow, and Spring Cloud Stream Applications.
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