Andreas Rogge is a software developer specializing in Linux and open-source infrastructure, with a strong focus on backup and automation solutions. He works at Bareos, contributing to the development and support of the open-source backup platform. Previously, he held roles as an IT manager and consultant, designing and operating complex IT environments.
- A Brief Introduction to Resilient Data Backup
Annebelle: Sales Executive at Adfinis, an open source system integrator that helps organisations such as banks and government institutions navigate their open source challenges.
- Is Your Secrets Management Open, Simple, and Reliable?
Hacker, maker, physicist.
Does things with sensors, leds, hackerspaces and hacker events.
- How to start anything -- from small projects to hackerspaces to huge events -- when you have only the foggiest of ideas
Brenno de Winter is expert op het gebied van informatiebeveiliging, digitale soevereiniteit en governance. Hij is directeur van Vigilis Consultancy en voorzitter van Stichting LibreKAT, waar hij zich inzet voor praktische en open oplossingen om digitale afhankelijkheden te verminderen.
Als adviseur, onderzoeker en spreker helpt hij organisaties om regie te krijgen op data, infrastructuur en risico’s. Hij is auteur van Fundamenten van informatiebeveiliging: Regulering, organisatie en techniek en Soevereiniteit! Hoe dan?, waarin hij complexe vraagstukken vertaalt naar concrete bestuurlijke keuzes.
Zijn werk kenmerkt zich door een nuchtere, uitvoerbare benadering: soevereiniteit niet als ideologie, maar als vraag naar regie, verantwoordelijkheid en continuïteit.
- Soevereiniteit! Hoe dan?
Emiel Brok is a seasoned Digital Sovereignty & Open Source Ambassador, and a prominent voice in the European FOSS ecosystem. He is actively involved in DOSBA (Dutch Open Source Business Association) and APELL (European Association of Next Generation IT Providers), where he works at the intersection of policy, community, and business strategy to promote European digital autonomy.
Known for his high-energy delivery and ability to translate complex regulatory frameworks (like CRA and NIS2) into actionable human stories, Emiel is a frequent speaker at international events. He is a passionate advocate for the "Power of Many," encouraging the ecosystem to move past compliance hurdles and embrace a philosophy of "Let’s Dance, not Fight!"
- Open by Choice, Sovereign by Design
Frank Hofmann works mostly from the road as a developer, Linux trainer and author. His preferred places to work are Berlin, Geneva and Cape Town. He is one of the authors of the Debian package management book.
- Help! Finding your way around a Linux system
Jeroen Baten is an open-source developer and IT coach with 25+ years of experience in Linux, CI/CD, and web application development. He contributes to the LibrePlan project, where he recently migrated all GitHub-based workflows to Forgejo Actions. He helps organizations adopt open-source tooling and build digitally autonomous development infrastructures.
- Van terminal naar tafel: communicatievaardigheden voor nerds
- Getting started with CI/CD using Forgejo Actions and why this is important AF
No longer completely Irish, not yet completely Dutch, trying to be completely FLOSS.
Ken has been living in the Netherlands for 25 years working for various Telco's and Cable Operators designing IP TV Platforms.
He is a free software enthusiast, and has been one of the Janitors at HPR since 2010.
- Hey Mum, I'm on Spotify !
- The Fediverse, just a nice place, not an alternative!
Ever since the first time Kris got in touch with his dad’s 1983 ZX Spectrum, he was captivated by the wonderful world of computer programming. In 1995, he learned to program ‘Pacman’ in x86 real-time assembly, which was soon followed by learning C and then C++ and Rust, which came to be his bread and butter. He is very serious about code quality and is mostly interested in C++, Rust, Linux, cybersecurity, programming languages/paradigms, software architecture and performance optimization. He currently works as the lead developer at ViNotion/Nedinsco and as a trainer at High Tech Institute in Eindhoven (NL). If he is not working, coding for fun or doing dad-/husband-related things, he is probably playing the guitar or running out in the woods.
- The XZ Utils backdoor
In 1985 I started my study Electrical Engineering at the Eindhoven University of Technology and I eventually got my PhD in 1997. I have always been tinkering with microcomputers and FORTH and I have been using Linux since 1992.
Today I work at Rambus B.V. in Vught, developing device drivers and test suites for complex cryptographic modules.
- FORTH: a pioneering language
I started my YouTube channel with videos about the Pinebook Pro.
I publish videos about a lot of devices running Linux, including RISC-V devices.
http://youtube.com/c/LivingLinux
- Games on RISC-V
More than 30 years of work experience in the IT industry, developing innovative systems and preventing cyber threats. I have worked as an independent architect in large and small companies and institutions, in both the private and governmental sectors.
Always working on architecture & design to solve complex problems in complicated environments. I am TOGAF and CISSP Certified and I hold both a Master (MSc) Business Studies of University of Groningen and a Master degree (MSc) Electrical Engineering, of Delft University of Technology.
Running FreeBSD since version 4 to keep things simple, solid and secure. I still love to do hands-on programming (C/C++, Java, Python, PHP,JS,GOlang etc) to learn, make and break things.
- False Sense of Security in Static Analysis: Building a Reliable Python SAST Scanner
Biographies are for people with too much ego.
- MuseScore workshop
Michael Boelen worked previously as a consultant for several Fortune 500 companies like Philips and ASML. In 2013, he started his own company CISOfy, focusing on Linux and UNIX security. Michael is interested in technical auditing, system hardening, and compliance. He developed several open-source security tools, including Rootkit Hunter (rkhunter) and auditing tool Lynis.
As part of his efforts to share knowledge, he enjoys blogging and maintains a Linux security blog named Linux Audit. In 2025, the Dutch blog Linux voor een beginner was created to help those new to Linux and make more accessible. His latest endeavor is a website to create an one-stop shop for open source, improve privacy, and lower our dependence on Big Tech. More information about Michael can be found at michaelboelen.com.
- We promote and talk about "open", but are we actually -doing- it enough?
Neal Walfield co-founded the Sequoia PGP project in 2017 and has lead the project ever since. Neal feels that not everyone shares his view that fundamental rights are non-negotiable. That is why he fights for privacy, data protection, and freedom of expression. In his spare time, he enjoys spending time with his family, reading - recently “Le Petit Nicolas,” whose stories seem too familiar to him - and cycling whenever possible.
- Verifying and Signing Artifacts with Sequoia PGP
- Opening talk in Grote Spoel
As Linux sysadmin is SSH my daily driver.
- SSH workshop