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The Tweakers Developers Summit offers a combination of high class, well-known international speakers, Dutch local heroes and international stars living in the Netherlands. None other than Peter Sunde (Pirate Bay), Aral Balkan, Rasmus Lerdorf and Stuart Russell gave keynotes in the last 2 years. This year you can expect the same high level. Dying to know the speakers of this edition? You'll find them below.

Stuart Russell was one of the keynote speaker in 2018



Mikko Hypponen
Mikko Hypponen is a global security expert who has worked at F-Secure since 1991 and has written for the New York Times and Wired. He is also very well known as a public speaker, appearing at multiple TED conferences world wide.


Harper Reed
Harper Reed is a technologist who, as CTO of the Obama 2012 campaign, was the first to bring tech mentality to politics. Thanks to the efforts of his team, Obama won the elections at the time. Reed has been further involved with, Modest Inc. has founded, the software team at PayPal and is known as a gifted speaker.

Jamie Bartlett

Jamie Bartlett
Jamie Bartlett is the author of three books: The People Vs Tech (2018) about data and democracies, Radicals (2017) about political outsiders and the best-selling The Dark Net (2014) about internet subcultures. He is the Director of the Centre for the Analysis of Social Media at the think-tank Demos. He recently presented the two-part BBC documentary series 'The Secrets of Silicon Valley'. His Ted Talk about the dark net has had over 3 million views.
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Masterclasses (webdevelopment)


Davy Engone (Hackages)
Davy Engone is a software engineer passionated by technology and education. He has more than 10 years of experience working as a software engineer consultant for many companies around Europe and in the US and was one of the best rated speakers from last years edition.
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DevSummit Philip Leonard

Philip Leonard (PICNIC)
Philip Leonard works as a software engineer at the online PICNIC supermarket and gives a master class at the Developers Summit entitled 'Reactive Programming: Why You Should Care about Future Proof Code'.
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Jouke Visser

Jouke Visser (Rabobank)
Jouke has been developing software for more than 20 years. Since 2013 he specializes in Frontend Development, and two years ago he joined Rabobank as Solution Architect for the Frontend Platform. His main responsibility is to design a new Frontend Platform that is ready for the future.
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Victoria Navarro Franco (Siemens Mobility GmbH)
Victoria is originally from Monterrey, Nuevo León, Mexico, and based in Germany since 2014. She has professional experience in Mexico and UK developing scalable applications, and she is currently working at Siemens Mobility GmbH as a software developer. She enjoys participating at a variety of non-profit organisations aiming to increase education opportunities for children and young people around the world.
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Prakash Palanisamy (Amazon Web Services)
Prakash Palanisamy is a Solutions Architect for Amazon Web Services. When he is not working on Serverless, DevOps or Machine Learning, he will be solving problems in Project Euler. He also enjoys reading about origin of universe, life, etc..
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Sebass van Boxel (GitHub)
Sebass van Boxel is Solutions Engineer at GitHub. He helps companies be more successful in the way they use GitHub and develop software.
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Bert Jan Schrijver

Bert Jan Schrijver (Open Value)
CTO Openvalue. Software craftsman and CTO focused on Java, Continuous Delivery and DevOps. International speaker, recognized Java champion, JavaOne rock star and Developer Champion. User Group leader for NLJUG (Dutch Java User Group), author for Java magazine and Devoxx4Kids volunteer.
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Pieter van Dorst

Pieter van Dorst (Passionate People)
Pieter van Dorst is a full stack Javascript developer with a clear passion for the web platform. Working at Passionate People he builds high quality software solutions at companies throughout the Netherlands using the latest and greatest in web technologies
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Jamie Maria Schouren (DEITY)
Jamie Maria is addicted to e-commerce, in love with code and her mind bound to business. With DEITY she is abetting an online revolution to evolve web technologies to the use of PWA solutions. One of her passions is to empower women and girls to never stop chasing their dreams.
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Masterclasses (science and more)

Guszti Eiben

Guszti Eiben (VU)
Guszti Eiben is a professor of Artificial Intelligence, with a focus on robotics. He connects evolution, robotics and intelligence and is best known for being the first person in the world who let two robots have a child.

Ali Niknam

Ali Niknam (bunq)
Ali Niknam is best known as the founder of TransIP and Bunq, but besides being a real nerd, he also founded his first company at age 16. He shows time and time again to be a visionary and is a well-known speaker in Dutch media.
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Daniel Linder (Adyen)
Daniel Linder is a Machine Learning enthusiast who works as a Data Scientist at Adyen. He is currently focused on building scalable, fault-tolerant, productionized machine learning systems. He also teaches advanced machine learning workshops internally at Adyen.
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Ren Yee (UNSense)
Head of Innovation Strategy and Forecasting at UNSense, the arch tech company founded by architect Ben van Berkel and UNStudio. UNSense explores, designs and implements strategies and technologies to improve people’s living conditions, and to make buildings and cities more humane and healthy. UNSense presents the opportunity to fully integrate digital and sensorial technology into the architectural design process.
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Masterclasses (security)

RIk van Duijn

Rik van Duijn (DearBytes)
Rik van Duijn works as an ethical hacker at DearBytes in order to keep the internet safe. Like no other he knows the way of thinking as a hacker and with this knowledge he is very successful in discovering vulnerabilities.
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Dirk Zittersteyn (HackerOne)
Dirk Zittersteyn works as a Senior Software Engineer at HackerOne and gives a masterclass within the track Security.
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Rini Icent Gopinath (ABN Amro)
Rini is an Information Securtiy Expert at ABN Amro who began her career in Cyber Security. She holds 5+ years of experience in investigating and handeling Cyber security incidents. She gives a masterclass within the track Security.
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Sanne Maasakkers (Fox-IT)
Sanne Maasakkers works as a Security Specialist at Fox-IT. In her current role, Sanne mainly deals with performing penetration tests to prevent malicious hackers at our customers. Next to this she stands ‘for a more secure society’, for example during awareness trainings, hack demos and guest lectures.
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Mischa Rick van Geelen (NFIR)
Mischa is an experienced IT forensic security researcher, speaker and entrepreneur. Because of his insights into the technologies of today and the impact and dangers of the Internet on society, Mischa is able to bring business and hackers closer to each other. Mischa works at NFIR, a forensic security company specialized in digital forensic investigation and penetration testing.
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Masterclasses (something different)


Remie Bolte (Project Privacy)
Remie Bolte is an Atlassian Marketplace Top Vendor. He has developed multiple add-ons for the Atlassian product suite, turning a late night side-project into a small business. Additionally he helps companies to leverage cloud solutions to create a high-available, high-performance IT infrastructure.

DevSummit van Loenen

Ricardo van Loenen (B. Building Business)
Ricardo van Loenen is co-founder and CEO of B., a platform for growth and workplace innovator. He has overseen B. Amsterdam's significant expansion to 64,000 sq. ft. of work space, hosting 300+ companies as tenants and over 2,000 entrepreneurs. Forever bringing startups, creatives, and corporates together, Ricardo has developed numerous governmental and corporate partnerships including IBM, Heineken and PWC.
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Guy Lagrand (Scrumworks)
My agile journey started back in 2007 at Parkmobile. The CTO said: “Project management doesn’t work anymore. Let’s do Agile with Scrum. You, fix it!” That said, I enrolled for a training hosted by Jeff Sutherland. He brainwashed me from not possible to I should have done this way earlier.
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Laure De Mey (ustwo games)
Laure De Mey works as a games programmer at ustwo games (based in London). Before that she was working in Belgium as a mobile app developer, but after working on a few VR/AR Unity projects decided to shift from mobile apps to mobile games programming. In her free time she’s been working on her own game called Discosnakes.
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Michiel Klitsie (Nedap)
Michiel Klitsie graduated in 2014 on the mastertrack ‘Medical Imaging & Interventions’ from Technical Medicine. After his studies he started working as a PhD candidate in the field of radiology, but quickly noticed that his true passion was making medical software. Currently he is working as a Software Engineer at Nedap Healthcare, where he works on a mobile electronic health record and innovative new applications for medical measurements. In addition, he works as a Technical Physician in the elderly care, where he treats patients with dementia.
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Masterclasses (mobile app development)


Ayelen Chavez (OLX group)
Ayelen Chavez is an Engineering Manager currently leading 2 teams in one of the OLX Group's Tech Hubs located in Berlin. OLX Group fuels local economies by making it super easy for anyone to buy or sell almost anything through our platforms. She has a master degree in Computer Science and more than 10 years experience developing solutions for different platforms. Ayelen moved to Germany 3 years ago and spends her free time either working out, travelling or in between her other hundred plus hobbies.
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Jeroen Zonneveld (Triple)
Jeroen Zonneveld is an iOS & tvOS developer from The Netherlands. He works as a mobile app developer for Triple in Alkmaar. The last years he worked on projects like My Vodafone for iOS and Videoland for tvOS.
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Jeroen Mol & Joep Admiraal (Ex Machina)
As Project Manager/Product Owner, Jeroen works closely with International clients to help bring millions of users together in multiscreen video and game interactions.

Joep is a lead developer specializing in backend development for large scale cluster software in mobile applications. He recently moved to a technical lead role managing the development of a video streaming platform.
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Bart Soeters (IceMobile)
Bart Soeters is iOS lead and is driven by beautiful things. Whether this is a beautiful piece of code or a delicious dish, this gives him energy. By focusing on scalability he aims to produce maintainable code ahead of business goals.
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Masterclasses (AI/machine learning)


Damiaan Zwietering (IBM)
Damiaan Zwietering is an IBM developer advocate who spent his career on achieving real world results innovating with information. He was a developer, consultant, architect and sales engineer in the area of data warehousing, business intelligence and advanced analytics before his current position as a developer advocate for data science, specializing in the application of machine learning and artificial intelligence.
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Eric Munneke (Eco-Movement)
Eric has been around in ICT, in a large variety of branches and techniques. From medical to geo, from ActionScript to Java. As CTO of Eco-Movement Eric can apply his knowledge to the advancement of electric driving.
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Vera van de Seyp
Vera van de Seyp is a designer and creative coder, working between design and development for clients as well as autonomously. Currently she studies Media Technology at the Leiden University and manages the Generative Design Research Network, developing projects with a focus on machine learning, language and design systems.
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Geert Vos & Joanna Krajewska (Media Distillery)
Geert is one of the founders and CTO of Media Distillery. In that role he is responsible for development and operations. With a team of 20+ developers and machine learning engineers Media Distillery builds a large scale video analysis platform for operators and media companies.

Joanna is a machine learning expert at Media Distillery with a strong software development background. She's been programming professionally for over 6 years and she's always on the hunt to learn something new.
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Masterclasses (internet of things)


Jan Jongboom (Arm)
Jan Jongboom leads the global evangelism team at Arm, the company behind the ARM architecture, shipping 22 billion chips last year. He’s always looking to connect more devices to the internet, tries to make computers smarter than humans and there's a monument in San Francisco with his name on it.
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Eric Bezzam (Snips)
Eric is passionate about education, open-source, and everything audio. He currently works for Snips in Paris, and previously worked at EPFL, Fraunhofer IDMT, and DSP Concepts. Snips enables makers and companies to add a voice assistant to their devices. All voice recognition takes place on device, meaning no voice data ever gets sent to the cloud.
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Johan Stokking (The Things Network)
Johan is tech lead and co-founder of The Things Network, an open, crowd sourced and decentralized internet of things network. Founded in 2015, The Things Network has become the world’s biggest LoRa network. As tech lead, Johan oversees architecture, product, development and operations, and likes to contribute to the open source stack too.
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Jan Willem Smeenk (SODAQ)
Jan Willem Smeenk is the founder and CEO of SODAQ, one of the early IoT pioneers. He has a background in the Internet that dates back to the 1980's. He was co-founder of in 1994 and connected Tanzania to the Internet in 1998. 12 years later he moved back to Holland to start SODAQ.
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Masterclasses (blockchain)


Rick Meerwaldt (APG)
Rick has been working as blockchain engineer at APG for some time now after graduating from his master in information sciences at the Vrije Universiteit. He graduated on the topic of process optimalization using blockchain, his thesis researched a specific use case within APG. APG is the largest pension provider in the Netherlands and manages the pension assets of 4.5 million Dutch citizens. While some people might not associate innovation with pensions, it is now one of the five national use cases for creating blockchain solutions.
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Sasha Pitkevich (Accenture)
Sasha Pitkevich is a Blockchain spokesperson and technology lead at Accenture the Netherlands. Before championing the technology in 2015, she has managed an impressive array of complex IT solutions from architecture to delivery, in demanding fields of global telecom, airlines and oil & gas multinationals.

Accenture is a leading global professional services company, providing a broad range of services and solutions in strategy, consulting, digital, technology and operations.
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Badreddine Tazrouti (
Badreddine is a Blockchain specialist and experienced international speaker who is able to explain complex technical concepts in simple everyday words, making it open and easy to understand for everyone!
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Peter Willemsen (codebuffet)
Peter is a IT/Blockchain lead developer and engineer with a clear focus on goals. He is a committed founder who thinks in challenges and not in problems, likes to multitasks and bring new ideas to the table, and is able to work in different languages like C++ and Python.
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