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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This schedule is automatically displayed in Central European Summer Time, CEST (UTC +2). To see the schedule in your preferred timezone, please select from the drop-down menu to the right.

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

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11:00 CEST

The Secret Lives of OSS Designers: Understanding Designers Contributing To OSS - Eriol Fox, Superbloom

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

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In October 2023 Superbloom.design published findings from 10-16 week diary studies reported by designers actively working on OSS contributions. The diary studies aim was to investigate some of the key questions relating to design in OSS and fill some of the larger systemic “gaps” of information from non-code contributors’ experiences in OSS. There is existing research about designers in open source, but it has focused on analysis of data on issue trackers or interviews with designers.

This session will cover an overview of the study, some of the key learnings and recommendations from Superbloom Designers on how to improve and progress design in OSS.

Speakers

Eriol Fox

Senior Designer and Researcher, Superbloom

Eriol has been working as a designer for 10+ years working in for-profits and then NGO's and open-source software organisations, working on complex problems like sustainable food systems, peace-building and crisis response technology. Eriol now works at Superbloom design, research... Read More →

Wednesday August 27, 2025 11:00 - 11:40 CEST
G001-002

Equity + Inclusion + Accessibility

Audience Experience Level Intermediate

11:55 CEST

The Hidden Heroes: How Non-Technical Contributors Find Their Place in Open Source Communities - Miaolai Zhou & Lahari Chowtoori, AWS

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

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In the open source world, while code contributions often take the spotlight, the ecosystem thrives on the crucial work of non-technical contributors. Through interviews with over 10 seasoned open source professionals in documentation, program management, and community building, we explore the vital role of non-technical contributors in open source ecosystems. Our talk delves into their emotional and professional journeys, from navigating code-centric communities to becoming essential project pillars.

We'll share authentic stories about overcoming imposter syndrome, achieving breakthroughs, and maintaining engagement despite challenges. The discussion examines how community dynamics and project structures influence non-technical contributors' experiences and success.

Drawing from these insights, we'll present practical strategies for project maintainers and community leaders to create welcoming spaces, develop inclusive contribution pathways, and foster long-term engagement with non-technical contributors. Whether you're leading an open source project or considering non-technical contributions, you'll gain actionable knowledge for building more inclusive and sustainable communities.

Speakers

Miaolai Zhou

Program Manager, AWS

Mila is a passionate program manager at AWS, spearheading funding programs that provide vital resources to open source projects. Her unwavering commitment to empowering and supporting these communities fosters sustainability, drives innovation, and enables collaboration. She actively... Read More →

Lahari Chowtoori

Technical Program Manager, AWS

Lahari Chowtoori is an AI enthusiast and Technical Program Manager at AWS, focusing on open source, Machine Learning, and Artificial Intelligence. With a background in Data Science and Machine Learning, she is passionate about democratizing AI knowledge and fostering community collaboration.She... Read More →

Wednesday August 27, 2025 11:55 - 12:35 CEST
G001-002

Equity + Inclusion + Accessibility

Audience Experience Level Intermediate

14:10 CEST

Responsible Innovation in AI: How You Can Shape the Future - Emily Witko, Hugging Face

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

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AI innovation isn't just technical—it's deeply human. In this talk, Emily Witko, a non-engineer leading AI talent strategy at Hugging Face, explores how diverse roles—from engineers, ethicists and policy experts to communicators and designers—play a crucial role in building ethical, inclusive AI. Through real-world case studies of AI gone wrong, they illustrate the risks of ignoring non-technical perspectives. Attendees will gain tools to challenge assumptions, advocate for accessibility, and bridge the technical-human divide. The future of responsible AI belongs to those who ask hard questions—and that includes you.

Speakers

Emily Witko

Engagement Specialist, Hugging Face

Emily is a people-obsessed engagement specialist with master’s level DEIB training. In their current role at Hugging Face, they source, recruit, hire, develop, and retain top AI talent, with a dedicated focus on decentralized team happiness and growth. Emily thrives in people-centric... Read More →

Wednesday August 27, 2025 14:10 - 14:50 CEST
G001-002

Equity + Inclusion + Accessibility

Audience Experience Level Beginner

15:05 CEST

Understanding the Need for Systemic Change in Open Source Through Intersectionality - Imma Valls, Grafana Labs

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

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While open-source communities strive for innovation, achieving genuine diversity and inclusion requires a fundamental understanding of systemic inequalities.

This talk centers on the lived experiences of women navigating open-source spaces. We will reveal the persistent challenges related to safety, lack of representation, and the critical importance of considering intersecting identities. By applying an intersectionality lens, we can gain a clearer understanding of the systemic changes required to dismantle the barriers.

This session will then focus on the power of sponsorship and fostering allyship as key strategies for enacting this change. We will highlight existing initiatives and brainstorm solutions to build a more welcoming and equitable community where everyone feels empowered to contribute.

Join us to explore how understanding the need for systemic change through intersectionality and how actively fostering allyship and sponsorship can pave the way for a truly diverse and inclusive open-source future.

Speakers

Imma Valls

Staff Developer Advocate, Grafana Labs

Imma is a Developer Advocate who loves automating stuff and anything that helps get apps from development to production.

Wednesday August 27, 2025 15:05 - 15:45 CEST
G001-002

Equity + Inclusion + Accessibility

Audience Experience Level Beginner

16:20 CEST

Adding the W3C’s New ARRM To Improve Your Project’s Accessibility - Mike Gifford, CivicActions

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

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The W3C recently released a draft of the Accessibility Roles and Responsibilities Mapping (ARRM) framework—a practical tool for open source teams to better define and share accessibility responsibilities across roles. In this session, we’ll explore how ARRM can help open source maintainers, designers, developers, content contributors, and community leaders collaborate more effectively on accessibility goals.

Whether you’re maintaining a solo project or coordinating a large contributor base, ARRM offers a roadmap to embed accessibility into your workflows and culture—without burning out a single “accessibility lead.” Learn how adopting ARRM can help your project move from one-time audits to continuous improvement, and why accessibility is a shared responsibility—not just a technical checklist.

https://www.w3.org/WAI/planning/arrm/

Speakers

Mike Gifford

Open Standards and Practices Lead, CivicActions

Mike Gifford is an open standards and practices lead at CivicActions and a thought leader on digital accessibility in the public sector. He is also a W3C Invited Expert and recognized authoring tool accessibility expert.

Wednesday August 27, 2025 16:20 - 17:00 CEST
G001-002

Equity + Inclusion + Accessibility

Audience Experience Level Any