Open Source Summit Europe 2025: Full Schedule

25-27, August 2025
Amsterdam, Netherlands
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Note: The schedule is subject to change.

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IMPORTANT NOTE: Timing of sessions and room locations are subject to change.

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11:00 CEST

Europe-China Open Source: Digital Sovereignty & Sustained Collaboration - Yehui Wang, Huawei & Daniel Izquierdo Cortázar, Bitergia

Wednesday August 27, 2025 11:00 - 11:40 CEST

G105

In an era of geopolitical shifts, countries seek technological independence, with open source as a key strategy. While US/European developer density is well-known, their interconnections with China’s ecosystem remain under explored. This talk aims at providing an overview based on quantitative data of the evolution of the European and Chinese ecosystems. And give indicators of commonalities across both industries through potentially shared interests.

According to 2024 global open source data released by China's OpenAtom Foundation:

• Europe leads with 3M+ active developers (17.8% YoY growth), while China follows with 2.2M+ (24.05% growth).

• Europe dominates mature domains like OS (3.49M annual contributions) and front-end (9.59M), while China excels in emerging fields such as AI (+29.94% ) and semiconductors (+121.64%).

This is growing a non-exclusive and possibly complementary ecosystem of body of knowledge, tools, and processes where different parties can take advantage of.

This talk will share some thoughts on possible collaboration pathways including: technical synergies (trusted AI and compliance), policy alignments, and community coordination by lowering the barriers.

Speakers

Yehui Wang

Open Source Data Analyst and Governance Expert, Huawei

Yehui Wang currently serves as an open source governance expert at Huawei Open Source Management Center. He also holds a position as a board member in the CHAOSS community and is a co-founder of the OSS-Compass community.

Daniel Izquierdo Cortázar

CEO, Bitergia

Daniel Izquierdo is a researcher and co-founder of Bitergia and currently holding the position of CEO, he is focused on the quality of the data, research of new metrics, analysis and studies of interest for Bitergia customers via data mining and processing. Daniel earned a PhD in... Read More →

Wednesday August 27, 2025 11:00 - 11:40 CEST
G105

OpenGovCon

Audience Experience Level Intermediate

11:55 CEST

Panel Discussion: Open Source in the Dutch (Semi) Public Sector: Strategies, Challenges & Digital Sovereignty - Jonas van den Bogaard, Alliander N.V.; Boris van Hoytema, Ministry of Interior Affairs and Kindom Relations, Marlena van Ooijen, Logius; Leon R

Wednesday August 27, 2025 11:55 - 12:35 CEST

G105

As open source grows in importance, more (semi)public organizations recognize its value. However, (semi)public organizations face unique challenges in adoption.

For organizations new to open source, developing a strategic approach and ensuring internal readiness can seem overwhelming. From engineering and technical teams to legal, finance, marketing, and executive leadership, aligning stakeholders on responsible and open source participation is critical—but not always straightforward. Many organizations address this by establishing an OSPO to create policies, provide training, and share best practices for open source adoption and contribution.

This panel brings together Open Source leaders from the Dutch (semi)public sector to discuss strategies for managing open source and fostering open source readiness. Panelists will share insights from their own open source journeys, offer practical guidance, and explore best practices for building open source engagement. The discussion will also highlight the role of open source in advancing Digital Sovereignty, ensuring organizations maintain control over their digital infrastructure while leveraging the power of open collaboration.

Speakers

Leon Roeleveld

OSPO , UWV

Dutch OSPO

Jonas van den Bogaard

Digital Strategy Lead & Open Source Office Lead, Alliander N.V.

Jonas van den Bogaard is a Digital Strategy Lead at Alliander, a distribution system operator (DSO) in the Netherlands. Alliander provides reliable, affordable, and accessible energy transport and distribution to a large part of the Netherlands. Open source has proved to be an enabler... Read More →

Boris van Hoytema

OSPO, Ministry of Interior Affairs and Kindom Relations, Ministry of Housing and Spacial Planning

To take away barriers and impediements to open source. And to maintain contact with OSPO's, governments, companies and developers.

Marlena van Ooijen

CIO advisor, Logius

Innovative CIO advisor, passionate about open source and responsible AI. I help my organization to unlock the power of a open source way of working, values that seamlessly align with my own beliefs. My focus is on collaboration, sharing knowledge and openness.

Leon Roeleveld

Wednesday August 27, 2025 11:55 - 12:35 CEST
G105

OpenGovCon

Audience Experience Level Beginner

14:10 CEST

Why Further Development on Publiccode.yml Is Neccessary - Tom Ootes, developer.overheid.nl

Wednesday August 27, 2025 14:10 - 14:50 CEST

G105

My story/message/ problem statement would be:

- A cultural change needs to take place. Instead of building software themselves, organizations should first explore the landscape (open standards/existing projects).

- However, not all OSS projects are yet findable in the public sector/with suppliers.

- Also, much metadata available in repositories is not platform-agnostic (thus embedded in Gitlab/Github)

- The agnostic standard that solves this: publiccode.yml. We need to apply this standard but also invest in it/contribute to it. Only then will it become more usable.

- "Infrastructure-as-code" projects within the government are increasingly available as open source. Organizations like Kadaster and Wigo4IT are about to open source this. To make the Dutch Digital Infrastructure more sovereign, it is crucial that these open source infrastructure components are also made findable.

- The publiccode.yml standard is already being used by FR/DE and Brussels, so it's logical to invest in this standard. We will have to make all our initiatives easily findable/searchable! The quality regarding metadata needs to improve.

Besides this i would like to emphasize that working OSS is just more fun.

Speakers

Tom Ootes

Developer Advocate, developer.overheid.nl

Has been working for the Dutch Government for in several roles. As a front-end dev for the Dutch Ministry of Health during covid building the Source Tracing Platform. Got interested in how developers co-operate within this government.

Wednesday August 27, 2025 14:10 - 14:50 CEST
G105

OpenGovCon

Audience Experience Level Intermediate

15:05 CEST

Freedom, Diversity, and Sovereignty: The Power of Open Source in Europe’s Digital Future - John Samuel, Seventh State

Wednesday August 27, 2025 15:05 - 15:45 CEST

G105

As the world grows increasingly fragmented, Europe stands at a digital crossroads. The loss of digital independence threatens its cultural, intellectual, and economic values. Post-Brexit, freedom of movement has been constrained—now, Europe risks a similar fate in the digital realm. Dependence on proprietary, foreign technologies undermines Europe’s digital sovereignty and its ability to shape its future.

This talk explores why Europe must invest in open-source software to preserve its freedoms, diversity, and identity in an evolving digital ecosystem. Open-source is more than technology—it’s a path to autonomy, reduced corporate dependency, and dynamic local markets that drive innovation. As software reshapes our lives, open-source ensures Europe’s digital landscape remains as diverse as the continent itself.

We’ll examine how open-source can counter AI’s global, generic biases by fostering systems that reflect Europe’s rich cultural tapestry. By embracing open-source, Europe can protect its digital future and core freedoms of movement, trade, and expression that define its identity. What does Europe stand to lose if it fails to invest in open-source technologies?

Speakers

John Samuel

Founder and Business Leader, Seventh State

John Samuel is a technologist and founder of Seventh State, a UK-based boutique consultancy specializing in Open Source. With clients like Bloomberg, Orange, Paychex, and Siemens, he has a long-standing passion for technology, dating back to the 80s. He enjoys dismantling and reassembling... Read More →

Wednesday August 27, 2025 15:05 - 15:45 CEST
G105

OpenGovCon

Audience Experience Level Intermediate

16:20 CEST

Towards Quality SBOMs: The OpenChain Telco SBOM Guide - Marc-Etienne Vargenau, Nokia

Wednesday August 27, 2025 16:20 - 17:00 CEST

G105

OpenChain is the international standard for open source license compliance programs ; it has been created by a joined effort of the community. The OpenChain project has several work groups. The Telco work group was formed to create a recommendation for an SBOM format to be exchanged between telecommunication companies, their suppliers and customers.

The result is the "OpenChain Telco SBOM Guide" that describes what a quality SBOM should contain and how and when it should be distributed. It includes industry standard requirements like "NTIA SBOM Minimum elements" and PURL. Although developed by telcos, it is generic and can be used by other industries.

The OpenChain Telco SBOM Guide is used by Nokia as a basis for its SBOM format. The talk will discuss lessons learned from implementing the Guide at Nokia. Putting the Guide in practice has led the community to provide a minor release 1.1.

Nokia provided an open source tool to validate SBOMs against the Guide. It allows to recursively validate linked SBOMs. It is available under Apache-2.0 license.

Speakers

Marc-Etienne VARGENAU

Senior Specialist Open Source, Nokia

Marc-Etienne Vargenau is a member of the Open Source team at Nokia. He has worked as an Open Source developer for many years. Among other projects, he contributed to FusionForge (https://fusionforge.org/) and PhpWiki (https://sourceforge.net/projects/phpwiki/). He is contributing... Read More →

Wednesday August 27, 2025 16:20 - 17:00 CEST
G105

OpenGovCon

Audience Experience Level Beginner