Most Active Speakers 2025

Sessionize proudly presents the list of the most active speakers in the year 2025!

  • 1125 speakers
  • Auto-generated
Rob Kuijpers

Rob Kuijpers

I love to tell you a story! Whether it's about autonomous agents, boosting personal productivity, enhancing your company's efficiency, exploring the latest CRM innovations within Dynamics 365, or mastering social selling through LinkedIn, I bring each story to life with passion and energy.

I love inspiring audiences, whether it’s on stage, through writing, in videos, or via podcast hosting.

Curious about Agents, AI, CRM, Copilot (Studio), Power Apps, Power Automate, or Power Pages? Ask me, and we could talk for hours.

With over 25 years of experience in the CRM field, I've supported marketing, sales, and service teams around the globe. While I’ve worked with almost every major CRM platform, Microsoft Dynamics 365 CRM has stole my heart over the past decade.

Also check my website: https://robkuijpers.com/

I love to tell you a story! Whether it's about autonomous agents, boosting personal productivity, enhancing your company's efficiency, exploring the latest CRM innovations within Dynamics 365, or mastering social selling through LinkedIn, I bring ea... Show more

Hrittik Roy

Hrittik Roy

Hrittik is a Platform Advocate at vCluster Labs and a CNCF Ambassador with expertise in cloud native technologies and open source communities. He has contributed extensively to developer advocacy, technical writing, and community engagement. Hrittik has been a keynote speaker at events such as the MCP Dev Summits and has delivered talks at Kubernetes Community Days, Open Source Summits, and more. He has also served as a Program Committee member for several KubeCons and CloudNativeCons.

Hrittik is a Platform Advocate at vCluster Labs and a CNCF Ambassador with expertise in cloud native technologies and open source communities. He has contributed extensively to developer advocacy, technical writing, and community engagement. Hrittik ... Show more

Adriana Villela

Adriana Villela

Adriana Villela is a blogger, host of the Geeking Out podcast, CNCF Ambassador, OpenTelemetry Community Manager, and maintainer of the OpenTelemetry End User SIG. By day, she focuses on Observability and OpenTelemetry, as a Principal Developer Advocate at Dynatrace. By night, she climbs walls. She also loves capybaras, because they make her happy.

In past lives, Adriana managed both a Platform Engineering team and Observability Practices team at Tucows. She has also worked at various large-scale enterprises as both an individual contributor and leader, including Bank of Montreal, Ceridian, and Accenture.

Adriana Villela is a blogger, host of the Geeking Out podcast, CNCF Ambassador, OpenTelemetry Community Manager, and maintainer of the OpenTelemetry End User SIG. By day, she focuses on Observability and OpenTelemetry, as a Principal Developer Advoca... Show more

Felix Jumason

Felix Jumason

Building cool software in Telco industry

Building cool software in Telco industry Show more

Simon Skotheimsvik

Simon Skotheimsvik

Simon is a Microsoft MVP and Senior Cloud Consultant at CloudWay, recognized globally as a leading voice in modern endpoint management, Microsoft Intune, and security in Entra ID.

As an international speaker, Simon is recognized for delivering engaging sessions that combine in-depth technical expertise with practical guidance, inspiring IT professionals to rethink how they manage and secure endpoints in today’s cloud-first world. His expertise and thought leadership have made him a trusted resource at major conferences and events worldwide.

Beyond the stage, Simon extends his influence through writing and community contributions, sharing strategies and best practices that help organizations thrive in the ever-changing landscape of endpoint and cloud management.

Driven by a passion for empowering others with knowledge, Simon continues to shape the conversation on modern workplace technology, ensuring IT leaders and practitioners are equipped to meet the challenges of tomorrow.

Simon is a Microsoft MVP and Senior Cloud Consultant at CloudWay, recognized globally as a leading voice in modern endpoint management, Microsoft Intune, and security in Entra ID. As an international speaker, Simon is recognized for delivering eng... Show more

Håkan Silfvernagel

Håkan Silfvernagel

Håkan holds a Master of Science degree in Electrical Engineering and a Master’s degree in Leadership and Organizational behavior. He has also taken courses on university level in psychology, interaction design and human-computer interaction. He has 25 years’ experience of software development in various positions such as developer, tester, architect, project manager, scrum master, practice manager and team lead.

Håkan is Chairman of the Norwegian .NET User Group Oslo (NNUG) and is active as an Ambassador for Oslo AI, the local chapter for the global City.AI community. In addition, he is the co-founder of AI42, an online school for learning about AI and Data Science and the Azure User Group Sweden, a meetup focused on Azure.

Håkan is a Microsoft Most Valuable Professional (MVP) in AI, a Microsoft Certified Trainer (MCT) and a MCT Community Lead.

Currently Håkan is working as an Senior AI Architect at Sopra Steria.

Håkan holds a Master of Science degree in Electrical Engineering and a Master’s degree in Leadership and Organizational behavior. He has also taken courses on university level in psychology, interaction design and human-computer interaction. He has 2... Show more

Mauro Morales

Mauro Morales

Mauro Morales is a Guatemalan software developer and speaker. He’s currently a Staff Engineer at Spectro Cloud, where he’s part of the team building Kairos — an open-source Linux distribution for running Kubernetes at the edge. Mauro regularly speaks at conferences like KubeCon, FOSDEM, and the Open Source Summit, and co-hosts the Cloud Native Community Belgium.

Mauro Morales is a Guatemalan software developer and speaker. He’s currently a Staff Engineer at Spectro Cloud, where he’s part of the team building Kairos — an open-source Linux distribution for running Kubernetes at the edge. Mauro regularly speaks... Show more

Dieter Gobeyn

Dieter Gobeyn

Dieter is a Microsoft MVP for Azure and an experienced IT architect since 2012. He focuses on designing clear, scalable enterprise architectures, with a strong emphasis on domain-driven thinking and practical cloud governance.
As a TOGAF-certified architect, he helps large distributed organisations simplify complex landscapes, align business domains, and build integration strategies that actually work across countries and teams.
He speaks at events about cloud architecture, enterprise integration, and the real lessons learned from modernising systems, adopting AI, and running global platforms without unnecessary complexity.

Dieter is a Microsoft MVP for Azure and an experienced IT architect since 2012. He focuses on designing clear, scalable enterprise architectures, with a strong emphasis on domain-driven thinking and practical cloud governance. As a TOGAF-certified a... Show more

Sergio Valverde

Sergio Valverde

Experienced professional with a diverse background in Software, Architecture, infrastructure, SRE, OpenSource. Versatile in Research and Development. Proven track record in various roles across startups and corporations. Committed team player, thriving in collaborative environments, and dedicated to continuous learning.

I love sharing what I learn, which is why I actively participate in tech communities, organize events, give talks, and create content on platforms like YouTube, X, and GitHub.

My goal when giving a talk is always to provide practical value by sharing real-world lessons, tools, and best practices that attendees can apply the very next day. If you join one of my sessions, you'll leave with clear ideas, real examples, and the motivation to try it yourself.

Experienced professional with a diverse background in Software, Architecture, infrastructure, SRE, OpenSource. Versatile in Research and Development. Proven track record in various roles across startups and corporations. Committed team player, thrivi... Show more

Vadym Pinchuk

Vadym Pinchuk

Vadym is a Software Development Engineer and Google Developer Expert (GDE) in Flutter & Dart, driven by a dual passion: engineering world-class mobile solutions and elevating the developers around him. His deep expertise and active contributions to the tech ecosystem were formally recognized by Google with the GDE award in 2025.

With a rich background spanning over 8 years in native Android and more than 6 years in cross-platform development with Flutter, Vadym has a proven track record of building high-quality applications. He has partnered with industry giants such as Samsung, Volvo, Instagram, and Sky, as well as numerous dynamic startups, to deliver cutting-edge mobile solutions across a diverse range of sectors.

A true believer in the power of sharing knowledge, Vadym is a powerhouse in the community and a familiar face on the international conference circuit. He is known for bringing vibrant energy to the stage at major events including Droidcon, Fluttercon, FlutterHeroes, and Appdevcon. But his commitment doesn't stop at the podium; he also actively supports events as an MC and stage manager, dedicating his energy to ensuring a smooth and engaging experience for speakers and attendees alike.

At his core, Vadym is on a mission to empower the tech community. He is deeply passionate about developer education and channels this into dedicated mentoring, fostering growth, and helping to build the next generation of tech leaders.

Vadym is a Software Development Engineer and Google Developer Expert (GDE) in Flutter & Dart, driven by a dual passion: engineering world-class mobile solutions and elevating the developers around him. His deep expertise and active contributions to t... Show more

Sharon Smith

Sharon Smith

A dual Microsoft Business Applications MVP in Customer Experience and Customer Service. An expert Microsoft Certified Dynamics 365 Solution Architect, who's led the delivery and implementation of several tailored and value-oriented solutions to meet diverse global and national business requirements, that lead to positive customer outcomes.

15x Microsoft Certified and Success by Design Accredited, I use its principles that blend strategic design, rigorous gap analysis, and the pursuit of excellence in service delivery, to craft pathways to success for customers.

As Founder of the Community-led organisation The Mentoring Hub, an award-winning mentor, knowledge sharer & educator; MVP Mentor Lead, and regular Community contributor and international public speaker, I have a 'thing' for learning, a thirst for knowledge, and a desire for sharing both to uplift and empower all.

A dual Microsoft Business Applications MVP in Customer Experience and Customer Service. An expert Microsoft Certified Dynamics 365 Solution Architect, who's led the delivery and implementation of several tailored and value-oriented solutions to meet... Show more

Truls Dahlsveen

Truls Dahlsveen

Hey guys, my name is Truls and I do security-related stuff mostly detection, automation and security engineering.

My experience spans from system- and network-administration, penetration testing experience and SOC, mainly security and automation engineering. I'm a Microsoft MVP in SIEM&XDR and spent most of my time off work either experimenting with some technical stuff or playing video games. I'm very curious and love to learn new thing, but my favorite thing is talking about or hearing others talk about things they tried that didn't work.

Hey guys, my name is Truls and I do security-related stuff mostly detection, automation and security engineering. My experience spans from system- and network-administration, penetration testing experience and SOC, mainly security and automation ... Show more

Sammy Deprez

Sammy Deprez

Sammy is a seasoned consultant with an extensive background in diverse industries and over a decade of experience. With a specialization in the Microsoft Stack, he has successfully undertaken and delivered numerous projects across sectors such as finance, healthcare, and beyond.

In 2015, Sammy made a significant shift in his career by redirecting his focus towards Machine Learning and Artificial Intelligence (AI). Recognizing the transformative potential of these emerging technologies, he dedicated himself to mastering their applications and staying at the forefront of the field. His deep understanding of AI and its practical implications has allowed him to contribute significantly to the advancement of organizations he has been involved with.

In 2017, Sammy played a pivotal role in the launch of a new company that specializes in leveraging Artificial Intelligence and Microsoft tools to maximize organizations' potential. His expertise and leadership were instrumental in establishing the company as a prominent player in the AI landscape. Through his strategic insights and hands-on involvement, Sammy has helped numerous businesses harness the power of AI to drive innovation, improve operational efficiency, and achieve sustainable growth.

Beyond his professional endeavors, Sammy is a passionate advocate for AI education and community building. He serves as a board member of the global AI community, where he actively contributes to fostering collaboration, knowledge sharing, and networking opportunities among professionals in the field. As an esteemed international speaker, Sammy frequently shares his expertise and insights at industry conferences, seminars, and workshops, inspiring and educating audiences about the transformative potential of AI.

Sammy's commitment to excellence and his contributions to the AI community have been recognized with the prestigious MVP (Most Valuable Professional) award in AI since 2021. This accolade further underscores his dedication, expertise, and impact in the field, cementing his position as a trusted advisor and thought leader in the intersection of AI and business.

With his vast experience, deep knowledge, and unwavering passion for AI, Sammy continues to shape the future of organizations by unlocking their potential through cutting-edge technologies, and inspiring others to embark on their own AI journeys.

Sammy is a seasoned consultant with an extensive background in diverse industries and over a decade of experience. With a specialization in the Microsoft Stack, he has successfully undertaken and delivered numerous projects across sectors such as fin... Show more

Luis Valdivia Humareda

Luis Valdivia Humareda

Trabajo como profesional de nivel C, líder técnico y desarrollador senior con más de 15 años de experiencia en el desarrollo de aplicaciones web y APIs (REST) utilizando Node.js, React, AWS, PHP y Python para diversas organizaciones y marcas locales. Mi enfoque se centra en la creación de soluciones escalables y en la implementación de las mejores prácticas. Tengo habilidades con numerosas pasarelas de pago, incluyendo Niubiz, Culqui, Stripe, Payu y Mercado Pago, y soy un desarrollador certificado en cada una de ellas. Además, cuento con certificaciones en Metodologías Ágiles (SDC y SMC) y tengo una maestría en gestión de proyectos (PMI).

En la actualidad, estoy trabajando en el desarrollo de soluciones OTT personalizadas utilizando AWS MediaLive y MediaConnect, integrando plataformas de comercio electrónico con soluciones ERP personalizadas como Odoo y Genesys, y construyendo sitios de alto tráfico utilizando varios proveedores de servicios en la nube como AWS (Cloud Practitioner y Cloud Architect) y GCP. Uno de mis logros más destacados fue entregar con éxito transmisiones en vivo para 350,000 usuarios concurrentes en un evento global.

Trabajo como profesional de nivel C, líder técnico y desarrollador senior con más de 15 años de experiencia en el desarrollo de aplicaciones web y APIs (REST) utilizando Node.js, React, AWS, PHP y Python para diversas organizaciones y marcas locales.... Show more

Richard Fichtner

Richard Fichtner

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

Adam Nichols

Adam Nichols

As a Lifelong Geek with almost 20 something yrs. experience working in the industry, I have spent the last 9 years at Microsoft, 4 yrs. as a Sr. Product Manager and 5 as a Sr. Microsoft Customer Engineer focused on Modern Management (Autopatch, Endpoint Manager, Autopilot, Azure Virtual Desktop, Windows OSD). I have had the unique opportunity to be exposed to a wide variety of customers and environments. I have authored many Microsoft Internal offerings, as well as presented at multiple Microsoft Internal and External Conferences and tech talks. I'm always excited to talk about tech and learn from others around me.

As a Lifelong Geek with almost 20 something yrs. experience working in the industry, I have spent the last 9 years at Microsoft, 4 yrs. as a Sr. Product Manager and 5 as a Sr. Microsoft Customer Engineer focused on Modern Management (Autopatch, Endpo... Show more

Diego Rodríguez Varela

Diego Rodríguez Varela

I am currently a Microsoft MVP (Developer Security) and Software Developer Engineer at Plain Concepts. Over the past 2 years I have had the privilege of speaking in more than 10 events for both Microsoft and Google communities.

In general, I am interested in exploring the methodologies and technologies that allow us to achieve secure systems, and how we can apply these principles in organizations of different sizes. That translates lately into: failsafe use of Generative AI Tools, K8S security, Frontend & Backend frameworks and even Webauthn authentication.

Besides software development, I am passionate about sports, motorbikes and, when I have enough time, travelling.

I am currently a Microsoft MVP (Developer Security) and Software Developer Engineer at Plain Concepts. Over the past 2 years I have had the privilege of speaking in more than 10 events for both Microsoft and Google communities. In general, I am in... Show more

Christopher Brumm

Christopher Brumm

I am a big fan of Microsoft Cloud Security products because there my two favorite topics Identity and Security work together in a unique way. I've been working in IT for quite a while and have over 15 years of experience in IT security in various roles. At the moment I am a Cybersecurity Architect at glueckkanja AG and help our customers with my favorite topics. I am 45 years old and live with my family in Hamburg.

I am a big fan of Microsoft Cloud Security products because there my two favorite topics Identity and Security work together in a unique way. I've been working in IT for quite a while and have over 15 years of experience in IT security in various ro... Show more

Camillo Bucciarelli

Camillo Bucciarelli

Industrialization Architect @ Sopra Steria with over 10 years of experience in the IT sector, specialized in mobile development and cross-platform applications. I work on architectures, development, and technology strategies for modern software products, with solid expertise in native Android, Flutter, and Firebase.
I support teams and companies on their digital transformation journey, with a focus on scalability and software quality. I am active in the tech community, teach and mentor at ITS Lanciano, and participate as a speaker at national conferences on Flutter, Firebase, and software development best practices.

Industrialization Architect @ Sopra Steria with over 10 years of experience in the IT sector, specialized in mobile development and cross-platform applications. I work on architectures, development, and technology strategies for modern software produ... Show more

Saurabh Mishra

Saurabh Mishra

Saurabh Mishra is a Cloud Evangelist and technology enthusiast specializing in cloud architecture, DevOps, automation, and Agentic AI. Through active community engagement, he shares practical knowledge on cloud-native solutions, AI-powered workflows, security best practices, and multi-cloud ecosystems. As a seasoned speaker and mentor, Saurabh has presented at conferences, meetups, and workshops, empowering teams to drive innovation, modernize their platforms, and unlock business value through cloud and AI technologies

Saurabh Mishra is a Cloud Evangelist and technology enthusiast specializing in cloud architecture, DevOps, automation, and Agentic AI. Through active community engagement, he shares practical knowledge on cloud-native solutions, AI-powered workflows,... Show more

Neil Chandler

Neil Chandler

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

Graziano Casto

Graziano Casto

Graziano is a DevRel Engineer at Akamas, where he spends his days convincing computers to stop being lazy and start being efficient. A former distributed systems developer and product manager, he’s now on a mission to optimize the entire cloud-native universe, one Pod at a time. As a Co-Chair for the CNCF TAG DevEx and a member of the Kubernetes Release Team since v1.34, he balances deep infrastructure roots with a passion for developer happiness. Obsessed with AI, Platform Engineering, and saving the planet through better code, Graziano is basically trying to make the cloud faster, greener, and significantly less annoying for everyone.

More on: https://castograziano.com/

Graziano is a DevRel Engineer at Akamas, where he spends his days convincing computers to stop being lazy and start being efficient. A former distributed systems developer and product manager, he’s now on a mission to optimize the entire cloud-native... Show more

Kasper Borg Nissen

Kasper Borg Nissen

Kasper is a CNCF Ambassador, former KubeCon+CloudNativeCon Co-Chair, Golden Kubestronaut, KCD Organizer, and CNCG Group Organizer. He co-founded Cloud Native Nordics to unite meetups across the region. At Dash0, he helps make observability easy for developers by advocating for better tooling, best practices, and seamless integrations. Bridging observability and platform engineering, he ensures developers stay productive and gain actionable insights exactly when needed.

Kasper is a CNCF Ambassador, former KubeCon+CloudNativeCon Co-Chair, Golden Kubestronaut, KCD Organizer, and CNCG Group Organizer. He co-founded Cloud Native Nordics to unite meetups across the region. At Dash0, he helps make observability easy for d... Show more

Stefan Pölz

Stefan Pölz

Stefan's passion is to practice Clean Code and test-driven development in order to build maintainable high-performance software in an ever-evolving team, supported by tools from the .NET Ecosystem. He loves to attend and speak at public developer events, co-organize local community gatherings, stream live programming sessions, and author open source projects, complementing his expertise in professional software development. As Microsoft MVP (Developer Technologies), JetBrains Community Contributor (.NET) and co-organizer of DotNetDevs.at, it's his ambition to share knowledge about everything C#.

Stefan's passion is to practice Clean Code and test-driven development in order to build maintainable high-performance software in an ever-evolving team, supported by tools from the .NET Ecosystem. He loves to attend and speak at public developer eve... Show more

Karinne Bessette

Karinne Bessette

Part technologist, part educator, part community organizer—Karinne Bessette operates at the intersection of enterprise security, hands-on learning, and human connection.
In their role as Technical Storyteller in Veeam's Office of the CTO, they specialize in Microsoft 365 security and backup strategy, develop thought leadership content, and present at conferences worldwide. Their speaking portfolio spans M365 administration, Power Automate, Copilot, AI agents, Adaptive Cards, adoption strategy, and workplace culture—with live demos, because they believe the best way to learn is by doing.
A Microsoft MVP, MCT Alumni, and Object First Ace with 10+ certifications, they also teach courses at Knox Technical Center and participate in Education Advisory Boards. They run the Women in M365 Book club and co-organize the Columbus Microsoft Teams User Group—because building community is as important as building solutions.
(See more: https://linktr.ee/rinbytes).

Part technologist, part educator, part community organizer—Karinne Bessette operates at the intersection of enterprise security, hands-on learning, and human connection. In their role as Technical Storyteller in Veeam's Office of the CTO, they speci... Show more

Mauricio "Salaboy" Salatino

Mauricio "Salaboy" Salatino

Mauricio Salatino, also known as salaboy, works for Dash0 as an Ecosystem Engineer. He is a Java Champion, Cloud Native Ambassador, published book author and international Keynote speaker. Before working at Dash0, Mauricio spent the last 15 years building tools for Cloud-Native developers at companies such as Red Hat and VMware. When he is not writing tools for developers or contributing to open source projects in the Cloud Native space, he teaches about Kubernetes, Cloud-Native and agentic engineering on his blog salaboy.com

Mauricio Salatino, also known as salaboy, works for Dash0 as an Ecosystem Engineer. He is a Java Champion, Cloud Native Ambassador, published book author and international Keynote speaker. Before working at Dash0, Mauricio spent the last 15 years bui... Show more

Mabrouk Mahdhi

Mabrouk Mahdhi

Mabrouk Mahdhi is a Principal Software Engineer and a recognized Microsoft Most Valuable Professional (MVP) in .NET technologies. He specializes in modern .NET development, with deep expertise in Blazor, ASP.NET Core, and .NET MAUI, building scalable web applications, enterprise APIs, and high-performance data-driven systems.

He is the founder and organizer of Tunisia Dev Days, one of the largest .NET and software engineering conferences in North Africa, bringing together developers, architects, and technology leaders to discuss innovation, AI, cloud computing, and modern software engineering practices.

Mabrouk is also an author and international speaker passionate about sharing knowledge with the developer community. He is the author of Mastering ASP.NET Core 10, a comprehensive guide to building modern, scalable, and secure applications with ASP.NET Core, as well as Laughing at Null: A Humorous Guide to Software Life, which offers a witty yet insightful perspective on the realities of software development and engineering culture.

Mabrouk Mahdhi is a Principal Software Engineer and a recognized Microsoft Most Valuable Professional (MVP) in .NET technologies. He specializes in modern .NET development, with deep expertise in Blazor, ASP.NET Core, and .NET MAUI, building scalable... Show more

Mohamed Mortadha Manai

Mohamed Mortadha Manai

Senior AI Engineer | Google Developer Expert in Cloud AI|Phd Candidate in xAI | AI Expert Consultant | AI Expert Author | International AI Speaker

Senior AI Engineer | Google Developer Expert in Cloud AI|Phd Candidate in xAI | AI Expert Consultant | AI Expert Author | International AI Speaker Show more

Brian Vermeer

Brian Vermeer

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

Mihaela Gheorghe-Roman

Mihaela Gheorghe-Roman

Mihaela is a Senior Software Architect at Systematic, Romania, and an Oracle ACE Associate for Java. PhD in Artificial Neural Network algorithms, Associate Lecturer at the University of Cybernetics and Informatics in Bucharest, she is passionate about building production-grade systems and bringing real-world experience to the stage.

In her professional career, spanning over 15 years, she has worked in the telecom and defence domains with a focus on Java, Spring Boot, C, C#, Scala and Angular, and a growing interest in AI systems and agentic architectures.

Outside of tech, she loves sports - from running marathons and martial arts to aerobic training - and travels the world whenever she gets the chance.

Mihaela is a Senior Software Architect at Systematic, Romania, and an Oracle ACE Associate for Java. PhD in Artificial Neural Network algorithms, Associate Lecturer at the University of Cybernetics and Informatics in Bucharest, she is passionate abou... Show more

Please note that Sessionize is not responsible for the accuracy or validity of the data provided by speakers.

Most Active Speakers 2025

Every year, we put together a list of the most active speakers. This list features the top 3% of speakers who have participated in events using Sessionize during the 2025.

The 3% is calculated from the pool of all speakers that have at least one accepted session in year 2025. We don't include inactive speakers or speakers that had no accepted sessions during the year. There are around 39,000 unique accepted speakers this year, the 3% is 1163. Not all of them have their speaker profiles set as public, and we respect that, so the list doesn't show all of them.

The calculation is based on the number of accepted events, that's the main criteria, but to get more refined results we also look at things like multiple sessions per event, sharing a session with a co-speaker and how big the event is. Number of submissions and declined sessions don't affect the list.

Please note that the count of events and sessions in this list does not represent the number of events and sessions from the year 2025. Instead, it shows the number of events and sessions featured on the speaker's public speaker profile; these numbers have nothing to do with the award itself.