Most Active Speakers 2025

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

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Whitney Lee

Whitney Lee

Whitney Lee is a creator and systems thinker who explores how observability, AI, and platform engineering connect across the cloud native ecosystem. She brings humor, depth, and clarity to complex technologies while building original frameworks that help others understand how systems fit together. She runs a vibrant YouTube channel, hosts Datadog Illuminated and Software Defined Interviews, has delivered two KubeCon keynotes and countless breakout talks, and combines storytelling and technical rigor to illuminate the human side of cloud native engineering.

Whitney Lee is a creator and systems thinker who explores how observability, AI, and platform engineering connect across the cloud native ecosystem. She brings humor, depth, and clarity to complex technologies while building original frameworks that ... Show more

Peter Eijgermans

Peter Eijgermans

Peter Eijgermans is a long-time software developer and an adventurous and passionate CodeSmith Frontend at Sopra Steria. He likes to travel around the world with his bike. Always seeking for the unexpected and unknown. For his job he tries out the latest techniques and frameworks. He loves to share his experience by speaking at conferences all over the World and writing for the Dutch Java magazine, Medium and DZone. He believes that you as the front-end developer are the spider in the web to bring the user, the team and the product together.

Peter Eijgermans is a long-time software developer and an adventurous and passionate CodeSmith Frontend at Sopra Steria. He likes to travel around the world with his bike. Always seeking for the unexpected and unknown. For his job he tries out the la... Show more

Rajani Ekunde

Rajani Ekunde

Rajani is a DevOps and Site Reliability Engineer (SRE) with over 4 years of experience in cloud infrastructure, automation, and platform engineering. She is a Google Developer Expert (GDE) for Google Cloud, a Docker Captain, and a Women Techmakers (WTM) Ambassador, actively contributing to the global tech community.
Rajani is a frequent speaker at major cloud and DevOps conferences, where she shares practical insights on modern infrastructure and emerging technologies. Passionate about knowledge sharing, Rajani aims to inspire and empower developers to build scalable, reliable systems.

Rajani is a DevOps and Site Reliability Engineer (SRE) with over 4 years of experience in cloud infrastructure, automation, and platform engineering. She is a Google Developer Expert (GDE) for Google Cloud, a Docker Captain, and a Women Techmakers (W... Show more

Giorgio Galassi

Giorgio Galassi

Senior Frontend Engineer with 10+ years of experience building large-scale, production-grade web applications. Specialized in Angular, TypeScript, NgRx, RxJS, and Nx, with a strong focus on component architecture, state management, micro-frontend patterns, and modular monorepos.

Most of my career has been spent in complex, multi-team environments where scalability and maintainability aren't optional. I think about frontend not just as UI delivery, but as a platform: shared libraries, design systems, DX tooling, and architecture that lets teams move fast without breaking each other's work.

Beyond code, I care deeply about the developer community. I'm co-founder of GDG Roma Città and co-organizer of NgRome. I write regularly on Angular topics and speak at conferences across Italy and Europe, including DevFest events and NgRome.

Senior Frontend Engineer with 10+ years of experience building large-scale, production-grade web applications. Specialized in Angular, TypeScript, NgRx, RxJS, and Nx, with a strong focus on component architecture, state management, micro-frontend pat... Show more

Arnaud Giuliani

Arnaud Giuliani

Arnaud Giuliani is co-founder of Kotzilla (Tech, Vision & Product) and creator of Koin, the most widely adopted dependency injection framework for Kotlin.

With 18 years of experience in software engineering across Java/JVM systems and Android, he has been an active speaker since 2016 with 60+ talks delivered across Europe and the US.

Recognized as a Google Developer Expert for Android & Kotlin and a member of the Kotlin Foundation, he focuses on the intersection of software architecture, developer experience, and AI-driven observability for mobile applications.

Arnaud Giuliani is co-founder of Kotzilla (Tech, Vision & Product) and creator of Koin, the most widely adopted dependency injection framework for Kotlin. With 18 years of experience in software engineering across Java/JVM systems and Android, he... Show more

Mauricio "Salaboy" Salatino

Mauricio "Salaboy" Salatino

Mauricio Salatino, also known as salaboy, works for Dash0 as an Open Source and Ecosystem Engineer. He is a Java Champion, Cloud Native Ambassador, and international Keynote speaker. Before working at Dash0, Mauricio spent the last 10 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 and Cloud-Native via his Blog salaboy.com and/or LearnKube

Mauricio Salatino, also known as salaboy, works for Dash0 as an Open Source and Ecosystem Engineer. He is a Java Champion, Cloud Native Ambassador, and international Keynote speaker. Before working at Dash0, Mauricio spent the last 10 years building ... 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

Øystein Hagen Blixhavn

Øystein Hagen Blixhavn


Øystein Hagen Blixhavn is passionate about getting stuff done, in basically all senses of the words. If it reduces wasteful effort and time, fantastic. If it improves the developer experience and increases their flow, amazing! This aspiration has led him to roles as system- and platform architect and platform developer, because these roles are directly concerned with increasing rate of stuff getting done.

Learning stuff and gaining cool insights is another thing that drives him, and his talks always seek to stimulate curiosity and induce this feeling in the audience.

Øystein Hagen Blixhavn is passionate about getting stuff done, in basically all senses of the words. If it reduces wasteful effort and time, fantastic. If it improves the developer experience and increases their flow, amazing! This aspiration has ... Show more

Marjolein Opsteegh

Marjolein Opsteegh

My name is Marjolein Opsteegh. I'm a Microsoft Data Platform MVP and a big Power BI enthusiast living in the Netherlands, who loves to share knowledge, especially at the intersection of Power BI, UI, and UX. As a consultant, I design and build dashboards that are both visually appealing and user-friendly, keeping end users in mind throughout the process.

In addition to creating dashboards, I enjoy writing about frontend principles and sharing practical tips to help others get the most out of Power BI. I frequently speak at events and host Q&A sessions, inspiring others to improve their skills and embrace the power of data visualization, both online and offline.

My name is Marjolein Opsteegh. I'm a Microsoft Data Platform MVP and a big Power BI enthusiast living in the Netherlands, who loves to share knowledge, especially at the intersection of Power BI, UI, and UX. As a consultant, I design and build dashbo... Show more

Roland Guijt

Roland Guijt

Roland is a Microsoft MVP, MCT and Pluralsight author enjoying a constant curiosity around new techniques in software development. His focus is on all things .NET and browser technologies with a special focus on security.
As a long-time trainer and speaker, he led many courses on these topics and spoke about these topics at many international conferences. He's currently working with Duende software to help building out their products.

Roland is a Microsoft MVP, MCT and Pluralsight author enjoying a constant curiosity around new techniques in software development. His focus is on all things .NET and browser technologies with a special focus on security. As a long-time trainer and... Show more

Juarez Junior

Juarez Junior

My name is Juarez Barbosa Junior. I have held senior leadership roles in software engineering and developer relations, focusing on developer audiences, subject matter experts, customers, and business partners. I have also acted as a mentor for Microsoft for Startups, having worked with startup founders, accelerators, incubators, mentors, and venture capitalists.

I am a Sr Principal Developer Evangelist and Director of Developer Evangelism at Oracle. Previously, I was an Azure Developer Relations Lead – Director of Developer Relations at Microsoft. In addition to that, I was a Principal Developer Advocate, Developer Advocacy Director at Oracle EMEA, and a Thought Leader and Technical Evangelist at IBM.

I have extensive experience with large enterprise systems and environments with companies like Oracle, Microsoft, IBM, Unisys, Nokia, Accenture, and a few medium-sized companies and startups (two as a founder). I have mastered presenting to technical and non-technical audiences and engaging the C-Level in technology and business transformation journeys.

I have received many awards, such as Oracle Customer Excellence 2025, Oracle ACE Mentor 2022, IBM Technical RockStar for Cloud, IBM Redbooks Thought Leader and Evangelist for IBM Mobile, Nokia Developer Champion, IBM Manager’s Choice Award, Superior Community Service Contributions—Forum Nokia Wiki, IBM Hall of Fame Awards, IBM Common Development and Test Outstanding Contribution Awards, and IBM Mobile Enterprise Social Media Residency Outstanding Contributor.

https://linktr.ee/juarezjunior

My name is Juarez Barbosa Junior. I have held senior leadership roles in software engineering and developer relations, focusing on developer audiences, subject matter experts, customers, and business partners. I have also acted as a mentor for Micros... Show more

Camillo Bucciarelli

Camillo Bucciarelli

Manager e sviluppatore software specializzato nello sviluppo mobile e applicazioni cross-platform con oltre 10 anni di esperienza nel settore IT. Attualmente ricopro il ruolo di Manager @ Sopra Steria e mi occupo di architetture, sviluppo e strategie tecnologiche per prodotti software moderni. Ho una solida esperienza su Android nativo, Flutter e Firebase, e supporto team e aziende nel raggiungere obiettivi di trasformazione digitale, usabilità e scalabilità.

Parallelamente alla mia attività professionale, contribuisco attivamente alla community tecnologia come membro GDG, insegno e faccio mentoring presso ITS Lanciano, e partecipo come speaker in conferenze nazionali su temi legati a Flutter, Firebase e buone pratiche di sviluppo software.

Manager e sviluppatore software specializzato nello sviluppo mobile e applicazioni cross-platform con oltre 10 anni di esperienza nel settore IT. Attualmente ricopro il ruolo di Manager @ Sopra Steria e mi occupo di architetture, sviluppo e strategie... Show more

Neel Shah

Neel Shah

I help platform engineers and DevOps teams understand and adopt cloud-native infrastructure through talks, demos, and community building. I organise the CNCF Gandhinagar, HashiCorp UG Gandhinagar, and Google Cloud Gandhinagar communities, and I have spoken at 40+ events, including KubeCon India, PlatformCon, HashiTalks, OpenSearchCon Korea, FOSS ASIA, and LinuxFest Northwest.

My core focus areas are Kubernetes, GitOps, IaC with Terraform/Vault, AI-powered DevOps tooling, and observability pipelines. I've mentored 15+ hackathons and open-source programmes.

Certifications: GCP DevOps Professional, Azure AZ-104, FinOps Certified Engineer, Terraform Associate, Vault Associate.

I help platform engineers and DevOps teams understand and adopt cloud-native infrastructure through talks, demos, and community building. I organise the CNCF Gandhinagar, HashiCorp UG Gandhinagar, and Google Cloud Gandhinagar communities, and I have ... Show more

Leonardo Micheloni

Leonardo Micheloni

Leonardo Micheloni has been a software developer for more than 20 years, and has been recognized as a Microsoft MVP for the last 10 years thanks to his collaboration with the development community in Latin America and Spain.
For several years he has been involved with good development and agility practices, and everything related to creating quality software.
He currently works for Tokiota in Madrid.

Leonardo Micheloni has been a software developer for more than 20 years, and has been recognized as a Microsoft MVP for the last 10 years thanks to his collaboration with the development community in Latin America and Spain. For several years he has... Show more

Fabio Catinella

Fabio Catinella

Fabio is an Android lover even before being an Android Developer.
He is specialized in Kotlin Multiplatform and Jetpack Compose, with a focus on building scalable architecture and fostering developer communities through international speaking. He is driven by high-quality code and the creative side of mobile innovation.

In his spare time, he also organizes community events with the GDG Venezia.

Fabio is an Android lover even before being an Android Developer. He is specialized in Kotlin Multiplatform and Jetpack Compose, with a focus on building scalable architecture and fostering developer communities through international speaking. He is... 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

Arin Roy

Arin Roy

As a Principal Architect with a specialization in Azure and AI, Arin excels at pioneering new services in Azure, bringing innovative solutions to his clients.

He is dedicated to keeping the developer community updated with new technology, advocating for best practices, and fostering a culture of continuous learning and innovation.

He combines his expertise in Azure and AI with a passion for mentoring and leadership, driving technological excellence and community engagement. He is also deeply passionate about the Microsoft Development Ecosystem and .NET, integrating these technologies seamlessly into his projects to deliver optimal results.

As a Principal Architect with a specialization in Azure and AI, Arin excels at pioneering new services in Azure, bringing innovative solutions to his clients. He is dedicated to keeping the developer community updated with new technology, advocati... Show more

Philip Seamark

Philip Seamark

Phil Seamark works on the Microsoft Fabric CAT team and is an accomplished database and business intelligence (BI) professional. Phil has an in-depth knowledge of the Microsoft BI stack along with extensive knowledge of data warehouse (DW) methodologies and enterprise data modelling.

Phil has expert knowledge in all facets of BI/DW including planning architecture, project management, dimensional modelling, performance tuning, ETL design, development and optimisation, report and dashboard design as well as installation and administration.
Phil has written several books DAX and Data modelling and has also blogged extensively at dax.tips

Phil Seamark works on the Microsoft Fabric CAT team and is an accomplished database and business intelligence (BI) professional. Phil has an in-depth knowledge of the Microsoft BI stack along with extensive knowledge of data warehouse (DW) methodolog... Show more

Andrew Connell

Andrew Connell

Andrew Connell is a full-stack developer who focuses on Microsoft Azure & Microsoft 365. He's a 22-year recipient of Microsoft's MVP award and has helped thousands of developers through the various courses he's authored & taught. Whether it's an introduction to Microsoft 365 development or a deep dive into specific software, Andrew's mission is to help web developers become experts in the Microsoft 365 ecosystem and irreplaceable in their organization and for their customers. He does this through his company, Voitanos, where he offers courses, articles, videos, tutorials, and coaching.

Andrew Connell is a full-stack developer who focuses on Microsoft Azure & Microsoft 365. He's a 22-year recipient of Microsoft's MVP award and has helped thousands of developers through the various courses he's authored & taught. Whether it's an intr... Show more

Chris Ayers

Chris Ayers

Chris Ayers is a Principal Software Engineer at Microsoft, where he builds AI-driven tooling to analyze outages and incidents across Azure. His work focuses on improving the way engineers understand failures, uncover risks, and strengthen reliability at cloud scale.

With a background spanning DevOps, cloud architecture, and modern application design, Chris brings both engineering depth and practical experience to the challenge of making large systems more resilient. He’s also a frequent international speaker who loves sharing real-world lessons about developer productivity, reliability, containers, and automation.

Outside of work, Chris is a proud dad, lifelong gamer, avid reader, and unapologetic nerd.

Chris Ayers is a Principal Software Engineer at Microsoft, where he builds AI-driven tooling to analyze outages and incidents across Azure. His work focuses on improving the way engineers understand failures, uncover risks, and strengthen reliability... Show more

Samuel Macharia

Samuel Macharia

Samuel Macharia is a skilled Cloud DevOps Engineer with a passion for leveraging cloud technologies i.e. AWS, Azure & Google Cloud to drive innovation. He holds certifications as a Google Cloud Certified Professional Cloud Architect and Microsoft Certified DevOps Engineer Expert, equipping him to design and manage secure, scalable, and high-performing infrastructure across multi-cloud environments.

Samuel is dedicated to empowering the next generation of tech talent and has served as a mentor in the Grow Your Skills for Sub-Saharan Africa Google Cloud Program 2024. With a focus on practical solutions and a commitment to communities including AWS User Group Kenya, CloudForce Sky, GDG Eldoret & Write the Docs Kenya where he volunteers, Samuel is excited to share his knowledge and inspire others to embrace the power of the cloud.

Coming from a community best known for resilience and entrepreneurial spirit, he opted to code his own path forward. When he's not building in tech, he's exploring new creative endeavors, mastering chess strategies, or immersed in an intense crime drama.

Samuel Macharia is a skilled Cloud DevOps Engineer with a passion for leveraging cloud technologies i.e. AWS, Azure & Google Cloud to drive innovation. He holds certifications as a Google Cloud Certified Professional Cloud Architect and Microsoft Cer... Show more

Alan Cox

Alan Cox

Alan Cox is a Microsoft MVP for Copilot & Microsoft 365 and has been in IT for almost 30 years and consulting for 25. His passion is helping organizations achieve more from their Microsoft 365 investments. Alan currently is the Director of Microsoft Governance for Genworth Financial.

Alan Cox is a Microsoft MVP for Copilot & Microsoft 365 and has been in IT for almost 30 years and consulting for 25. His passion is helping organizations achieve more from their Microsoft 365 investments. Alan currently is the Director of Microsoft ... Show more

Javier Armesto

Javier Armesto

I am Javier Armesto Gonzalez, a technology leader with over 20 years of experience in the IT sector. Currently, I work as Head R&D + AI @ at VS-Sistemas.

With a passion for technology and innovation, I have been honored by Microsoft with the MVP (Most Valuable Professional) award in the "Business Applications" category for the past two years, recognizing my valuable contributions to technical communities.

Additionally, I am a certified Microsoft trainer, dedicated to delivering advanced knowledge and training on Microsoft technologies. In recent months, I have been actively collaborating with Microsoft Reactor on YouTube, sharing my expertise on Azure's artificial intelligence services.

I also share my knowledge and experience through my personal blog, TechSphere Dynamics, where I publish articles and resources on the latest trends and technologies in business applications and artificial intelligence.

For more information or to contact me, feel free to email me at javiarmesto@gmail.com.

Blog : https://techspheredynamics.com/
YouTube channel : https://youtube.com/@techspheredynamics9753?si=AbZ6nSljq3SAxst8
MVP Profile : https://mvp.microsoft.com/en-US/MVP/profile/29ac6398-c755-ed11-9561-000d3a197333

I am Javier Armesto Gonzalez, a technology leader with over 20 years of experience in the IT sector. Currently, I work as Head R&D + AI @ at VS-Sistemas. With a passion for technology and innovation, I have been honored by Microsoft with the MVP (... Show more

Thomas Naunheim

Thomas Naunheim

Thomas Naunheim is a Cyber Security Architect at glueckkanja AG and a Microsoft MVP from Koblenz, Germany, specializing in cloud-native identity and security solutions in Microsoft Azure and Microsoft Entra. With a deep focus on privileged identity management, identity security, and Zero Trust architecture, he designs and implements security solutions for real-world enterprise environments.

Thomas actively gives back to the community as a blogger at cloud-architekt.net, where he publishes in-depth research and practical insights on Microsoft Security. He is a speaker at international conferences and meetups, co-author of the open-source Entra ID Attack & Defense Playbook, and the creator of EntraOps - a community tool for privilege classification based on the Enterprise Access Model.

Beyond content creation, Thomas co-hosts the podcast Cloud Inspires and is actively involved in community organization as a member of the Azure Meetup Bonn and Cloud Identity Summit organizing teams. His long-standing contributions across blogging, speaking, and open-source development earned him the Microsoft MVP award in the Identity & Access and Cloud Security category.

Thomas Naunheim is a Cyber Security Architect at glueckkanja AG and a Microsoft MVP from Koblenz, Germany, specializing in cloud-native identity and security solutions in Microsoft Azure and Microsoft Entra. With a deep focus on privileged identity m... Show more

Bob Walker

Bob Walker

Bob Walker is a Field CTO Octopus Deploy. Bob started as a developer in the early days of .NET when web forms were the hottest new thing, and manual deployments were the norm. After one too many five-hour 2 AM Saturday deployments, he searched for any automation to stop that pain. His original focus was on automating database deployments. Since then, his passion remains writing code but has expanded to creating full CI/CD pipelines, Continuous Delivery, DevOps, and Platform Engineering.

Bob Walker is a Field CTO Octopus Deploy. Bob started as a developer in the early days of .NET when web forms were the hottest new thing, and manual deployments were the norm. After one too many five-hour 2 AM Saturday deployments, he searched for ... Show more

Tori Tompkins

Tori Tompkins

Tori is a Principal AI Consultant at Advancing Analytics and Microsoft AI MVP. Specialising in MLOps and LLMOps, Tori has worked on many ML and data science projects with Azure and Databricks at all stages of the ML Lifecycle. She is a co-presenter of the Data & AI podcast, Totally Skewed, founder of Girls Code Too UK and Trustee of Girls in Data.

Tori is a Principal AI Consultant at Advancing Analytics and Microsoft AI MVP. Specialising in MLOps and LLMOps, Tori has worked on many ML and data science projects with Azure and Databricks at all stages of the ML Lifecycle. She is a co-presenter o... Show more

Christian Woerz

Christian Woerz

Christian is a Microsoft MVP, Oracle ACE in Java and Fullstack engineer with over 15 years of experience as an engineer. He started with Java and since 9 years works also in the frontend with Angular, TypeScript and JavaScript. Besides his daily work he enjoys giving talks, creating YouTube videos for his over 8000 subscribers, works on his open source projects. If there is time left he gives workshops giving trainings regarding the successful usage of AI in software engineering and writes articles.

Christian is a Microsoft MVP, Oracle ACE in Java and Fullstack engineer with over 15 years of experience as an engineer. He started with Java and since 9 years works also in the frontend with Angular, TypeScript and JavaScript. Besides his daily work... Show more

Baruch Sadogursky

Baruch Sadogursky

Baruch Sadogursky (@jbaruch) did Java before it had generics, DevOps before there was Docker, and DevRel before it had a name. He built DevRel at JFrog from a ten-person company through IPO, co-authored "Liquid Software" and "DevOps Tools for Java Developers," and is a Java Champion, Microsoft MVP, and CNCF Ambassador alumni.

Today, he's obsessed with how AI agents actually write code. At Tessl, an AI agent enablement platform, Baruch focuses on context engineering, management, and sharing. On top of sharing context with AI agents, Baruch also shares knowledge with developers through blog posts, meetups, and conferences like DevNexus, QCon, Kubecon, and Devoxx, mostly about why vibecoding doesn't scale.

Baruch Sadogursky (@jbaruch) did Java before it had generics, DevOps before there was Docker, and DevRel before it had a name. He built DevRel at JFrog from a ten-person company through IPO, co-authored "Liquid Software" and "DevOps Tools for Java De... Show more

Arjan Rijsdijk

Arjan Rijsdijk

I’m Arjan Rijsdijk, a Power Platform enthusiast, or as I like to call myself, a Power Addict, based in the Rotterdam area in the Netherlands. I work at Powerbouwer on some of the coolest Power Platform projects, always focused on creating real added value for users.

My first introduction to the Power Platform showed me how much impact smart low-code and vibe-code solutions can have. Since then, I’ve kept building, experimenting and learning. What I enjoy most? Working with other Power Platform experts and pushing each other to the next level.

I also love sharing that passion as a speaker. At events and sessions, I talk about the Power Platform, my experiences and the lessons I pick up along the way.

Learn something new every day. Stay Hungry. Stay Foolish.

I’m Arjan Rijsdijk, a Power Platform enthusiast, or as I like to call myself, a Power Addict, based in the Rotterdam area in the Netherlands. I work at Powerbouwer on some of the coolest Power Platform projects, always focused on creating real added ... Show more

Hossein Salahi

Hossein Salahi

Hossein is a Cloud Tech Lead with nearly a decade of experience architecting distributed systems and scalable infrastructure. From engineering enterprise-grade, on-premises Kubernetes platforms to leading complex DevOps transformations, he specializes in building resilient systems. Beyond driving technical strategy, Hossein actively mentors platform engineering teams and shares his expertise through industry talks and workshops.

Hossein is a Cloud Tech Lead with nearly a decade of experience architecting distributed systems and scalable infrastructure. From engineering enterprise-grade, on-premises Kubernetes platforms to leading complex DevOps transformations, he specialize... 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.