Our Speakers


Pep Rosenfeld

Keynote speaker

Pep Rosenfeld is Boom Chicago’s creative multi-tasker: Writer, performer, director, trainer, stand-up comedian, public speaker, host and facilitator.

This creative American loves to make comedy about current events and politics, and is a passionate user of technology. He hosts a lot of technology related events like The Next Web and the Accenture Innovation Awards.


René van Hees

Chief Software Architect at Thales Netherlands

René van Hees is the Chief Software Architect at Thales Netherlands. René has worked for several software companies in both the Netherlands and Germany before he started at Thales Netherlands in 2002. In his role of Chief Software Architect, he is responsible for all technological, process, methodology, architectural and innovation related aspects concerning the development of the (real time embedded) software. After some years of research Thales is now actually migrating to a real-time distributed (micro) service architecture. This is described in the fully open INAETICS architecture (www.inaetics.org).


Rudy van Buren

Winnaar van McLaren’s Worlds fastest Gamer 2017

Rudy van Buren is de winnaar van McLaren’s World’s Fastest Gamer. Als prijs is Rudy officieel als McLaren’s F1 simulator test driver benoemd. Hij heeft meer dan 30000 andere deelnemers verslagen om deze eSport-competitie te winnen.



GP Gooiker

Interaction designer at Luminis /Rotterdam

GP likes to design and build digital stuff. From the moment he got his Atari with a whopping 1Mb memory, he has been tinkering with computers. Part of the front-end group of Luminis in Rotterdam, he spends most of his time developing web applications. He likes to design apps as well, connecting stakeholders to developers. Before it was cool, he was involved with building 3D models for a project that aimed to cure phobias in Virtual Reality. As a side project, he’s making apps that live in the real world using mixed reality technology.


Niels Wissels

UX-designer at Luminis /Arnhem

Niels helpt organisaties en mensen veranderen door samen nieuwe producten en diensten te bedenken en ontwerpen.
Als UX-designer en digitaal strateeg maakt Niels toepassingen die prettig in gebruik zijn en die vooral de bedrijfsdoelstelling van de organisatie behalen. Dit helpt organisaties om in onze veranderende wereld verder te komen. In complexe en grote(re) trajecten komt de creativiteit van Niels het best tot zijn recht waarbij Niels ook vaak helpt de werkwijze rond UX binnen organisaties duidelijk te krijgen.


Florus Wilming

Co-founder of Onboard

Florus is medeoprichter van Onboard een Nederlandse startup die een digitale revolutie leidt in de maritime industry. Het door Onboard in samenwerking met Luminis ontwikkelde IIOT platform heeft in 2017 de Duke’s Choice Award gewonnen.


Steef Burghouts

Software Engineer at Luminis /Arnhem

As a Java developer, Steef loves to take deep dives into technology stacks. He believes that being a good developer is so much more than writing readable and elegant code. Developers should never lose focus on what they are trying to achieve with the software. Recently he has picked up on the no-interface hype and is working to integrate a smart home thermostat system with platforms like Alexa and IFTTT. Besides talking to Alexa, Steef likes to go for a run or bike ride and is trying to combine those in the near future.


Rafaëla Breed

Software Engineer at Luminis /Amsterdam

Rafaëla is a software engineer at Luminis in Amsterdam and driven to solve problems with creative solutions. She is very involved in the development of backend systems in Java with Spring. This is including the surrounded technologies needed to test and monitor the produced applications. In her spare time, she also likes to keep up-to-date with frontend technologies such as Angular 5 and React.


Jouri Fledderman

Software Engineer at Luminis /Apeldoorn

Jouri is an enthusiastic full stack developer at Luminis Apeldoorn with a focus on Java and Angular (Ionic) technology. He is currently working on Equestic, a project combining both of these focus areas with IoT. He likes to try new technologies and share his knowledge.


Pim Voeten

Software Engineer at Luminis /Rotterdam

Pim is a senior developer at Luminis in the Netherlands. He has a lot of experience developing Java projects for many different customers. Most of the projects he has worked on were heavily Spring oriented stacks. In some projects he has fulfilled the role of SCRUM master, but mainly he is a full stack developer.


Marcel Offermans

Managing Director at Studio 397

Marcel is leading a global team of developers, engineers and artists building rFactor 2, the most realistic, accurate and engaging sim racing platform to date, with advanced physics, a state of the art graphics engine and competition infrastructure.

Fellow at Luminis. Software architect with a broad experience in different operating systems, languages and applications and a strong focus on component based, service oriented architectures.

Member of the Apache Software Foundation and regular speaker at conferences, including ApacheCon, EclipseCon, JavaOne, OSGi DevCon, Devoxx and NLJUG.


Jettro Coenradie

Fellow at Luminis /Amsterdam

Jettro is a Fellow at Luminis in Amsterdam, specialized in Search. He has a strong background in the Java eco system. He also has experience in the front-end with React and Angular. These days Jettro is mainly involved with the elastic stack and he is learning about and experimenting with Machine Learning. Combining Machine Learning with Search to solve one of the hardest search problems, named ranking, is what keeps him going. Jettro believes in the vision of Luminis that: Knowledge is the only thing that increases by sharing. Therefore he writes blogs, gives trainings and presents at a number of meetups and conferences.


Arjan Schaaf

DevOps architect at Luminis /Technologies

Arjan has been developing modular and web applications using Java, OSGi and Groovy for years as a software engineer and architect.
As a DevOps architect, Arjan has shift his focus to bringing development, operations and business together.
Arjan has a passion for bringing the work of many people together in the Cloud and making it run secure and reliable, using the latest offerings the public cloud and the Linux Container Ecosystem.


Hans Bossenbroek

Co-founder & CEO of Luminis

Hans Bossenbroek is one of the founders and Chief Executive of Luminis. After a long career working for consultancy organisations and doing freelance jobs, Hans concluded that the potential of IT, the inherent complexity of software engineering and the power of innovation can only be unlocked by harnessing the power of the collective. It may seem strange, but this coincides with his love for jazz music, diving and mountaineering. They all build upon the aptitude, discipline and persistence of the individual in a team.

This complex reality is aptly described by Neil Young: “It’s better to burn out than to fade away”.


Evertson Croes

Software Engineer at Luminis /Arnhem

Evertson has been working as a software engineer at Luminis for over 2 years. He is interested in connecting the real world to the digital world by using technology. This is commonly referred to as the Internet of Things (IoT), which was the topic of his master thesis and which he works on every day at Luminis through the BDR project (Smart thermostat). He has worked the last two years on this project in the capacity of front-end and back-end engineer. On his free time he enjoys working on side projects with new technology stacks, such as GraphQL.


Tom Meulenberg

Software Engineer at Luminis /Arnhem

Nadat Tom afgelopen zomer is afgestudeerd aan de Hogeschool Arnhem en Nijmegen, is hij gestart als Software Engineer bij Luminis Arnhem. Tom is een ontwikkelaar die veel waarde hecht aan kwaliteit. Hij houdt niet van half werk en hij maakt graag dingen waar hij én anderen trots op zijn. Hij heeft zich tijdens zijn studie gespecialiseerd in webdevelopment. Aanvankelijk richtte hij zich op de ontwikkeling van webapplicaties, maar gaandeweg kwam hij tot de conclusie dat algehele softwareontwikkeling hem ook interesseerde en heeft hij zich toegelegd op applicatieontwikkeling met .Net. Dit is waar Tom zich vandaag de dag voornamelijk mee bezighoudt.


Byron Voorbach

Search & Data Engineer at Luminis /Amsterdam

Byron Voorbach is a Search & Data engineer at Luminis in Amsterdam. He has broad experience in security, backend development and Spring technologies. For the last 5 years, Byron has mostly been working with the Elastic Stack, taking a great interest in building and optimizing search engines. He loves to go to music festivals and travel in his spare time.


Frank Folsche

Software Engineer at Luminis /Arnhem

I’m a fullstack .NET developer that is always looking for new cool things. For the last few years my focus has shifted from static web-development to progressive web-apps with Angular. Recently I’m working on some cool Xamarin projects to build great native apps with a shared code base.


Marc Teutelink

Software Architect at Luminis /Apeldoorn

Marc is an experience architect at Luminis Apeldoorn with almost 25 years of experience. Marc’s focus is mainly open source backend and (mobile) frontend technology. Besides his broad focus he is also specialised in Enterprise Search, Profiling and Recommendation, EAI and Semantic Web.


Bert Ertman

Fellow, Director of Technology Outreach at Luminis

A frequent speaker on Java, Cloud, and software architecture all over the world. Book author, and serial conference organizer. Bert Ertman was awarded the coveted title of Java Champion in 2008, and is a JavaOne RockStar speaker and Duke’s Choice award winner.


Angelo van der Sijpt

Fellow at Luminis /Eindhoven

Angelo is a Fellow at Luminis Eindhoven, with a specialty in Connected Devices and Security. He has experience in technology as an engineer and architect, ranging from Java to Ruby to iOS with some agile coaching thrown in for good measure. Nowadays, his main question is “are we providing what our customer needs,” both in starting and ongoing projects. Angelo is active in consulting, architecting, engineering, coaching and training in all parts of the software engineering process, and is inordinately proud of his Wireshark skills.


Chris van Beek

Software Architect at Luminis /Arnhem

Chris van Beek is een software-architect bij Luminis in Arnhem. Na 8 jaar bezig te zijn geweest als ontwikkelaar en trainer op het gebied van Microsoft technologie houdt Chris zich nu vooral bezig met architectuur en software ontwikkeling op het Microsoft platform. Daarbij vindt hij het leuk om de nieuwste technologieën te onderzoeken en de opgedane kennis uit te dragen. Chris heeft veel ervaring met de Microsoft stack, Azure en front-end development met behulp van Angular, Typescript /Javascript, HTML.

Chris was voted as best rated speaker of DevCon 2017!


Hans Gringhuis

CTO at Luminis

CTO and Fellow at Luminis, working from Apeldoorn, Netherlands. Over 20 years in the software industry mainly as a software architect. Hans’ experience covers almost every facet of software delivery having worked across many different domains including E-Commerce, Publishing, Defence and Industry. Passionate about software and turning technology into a competitive advantage.


Ivo Domburg

Designer at Luminis /Arnhem

I’m a designer with a broad experience in creating (web) applications and other digital experiences. I believe that you can’t be the best at what you do when you only do what you are best at. That is why I also write about product development and everyday human/technology relations. And I try to code. That doesn’t make me a writer or an engineer, but I believe it makes me a better designer.


Xander Uiterlinden

Software Architect Luminis /Technologies

Xander is a software developer at Luminis. He has a broad experience in architecture, design and engineering of modular applications. He is a committer at the Apache Felix project contributing to the Apache Felix Dependency manager component and is also involved in several other smaller open source projects.


Gerard Verbeek

Software Engineer at Luminis /Apeldoorn

Gerard heeft ruim 8 jaar ervaring in het ontwikkelen van software. Naast zijn werkzaamheden als software engineer is hij actief binnen Luminis Apeldoorn als technical sales, gericht op machine learning.

Hij vindt het belangrijk om leuke ideeën en kennis te delen. Daarom is hij naast zijn werkzaamheden bij Luminis ook actief betrokken bij het organiseren en verzorgen van workshops voor Devoxx4Kids, en spreekt hij regelmatig bij meetups door het hele land.


Koos Gadellaa

Software Engineer at Luminis /Apeldoorn

Koos is a senior software engineer at Luminis in Apeldoorn. He specializes mostly in Spring, testing, and backend development, but is also an avid security aficionado. Ever since his master thesis on security, he is more than outspoken about the many ways security measures can be circumvented. In his spare time he’s a passionate basketball referee.


Piet van Dongen

Full stack developer at Luminis /Arnhem

Piet is an experienced and passionate full stack developer, always aiming to improve himself and those around him.
He believes that the key to success in the software business lies in the sharing of knowledge, sources and solutions — we are all standing on the shoulders of giants. That’s why he loves to dive deep into new technologies and share his findings with an audience. The more we connect, the better we get.


Harro Vons

Product Creator at Luminis /Arnhem

Harro is een professional bij Luminis in Arnhem met een passie voor het bedenken en maken van geweldige producten. Met zijn opleiding als UX-er en ruime ervaring met requirements management en Scrum levert hij een bijdrage aan iedere fase in de ontwikkeling van een app of product. Dat begint bij het ontwerpen van nieuwe concepten en gaat via het doen van interactie-ontwerp en usability-testing naar het opstellen van user story’s voor de realisatie in Agile teams. Ook vult hij vaak de rol van product owner in.


Jeroen Reijn

Software Architect at Luminis /Amsterdam

Jeroen is a software architect at Luminis and is very passionate about software engineering and engineering culture. He likes to share his broad knowledge and helps the organizations he works with to apply practices like Continuous Delivery to reach a new level of productivity.
He has a strong Java background and is committer and active community member on several open source projects at the Apache Software Foundation.


Sander Mak

Fellow at Luminis /Apeldoorn

Sander is a Fellow at Luminis in The Netherlands, where he crafts modular and scalable software, most often on the JVM, but with a touch of TypeScript when needed. He also is a Java Champion and author of the O’Reilly book ‘Java 9 Modularity‘. As an avid conference speaker, Sander loves sharing knowledge, also through his blog at http://branchandbound.net and as Pluralsight instructor.

Sander was voted as best rated speaker of DevCon 2017!

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