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7-9 October, 2026
Prague, Czechia
View More Details & Registration
Important Note: Timing of sessions and room locations are subject to change.

The Sched app allows you to build your schedule but is not a substitute for your event registration. You must be registered for Open Source Summit Europe 2026 to participate in the sessions. If you have not registered but would like to join us, please go to the event registration page to purchase a registration.



Type: Open Source 101 clear filter
Wednesday, October 7
 

11:20 CEST

Containers as an Illusion - Michael Kerrisk, man7.org Training and Consulting
Wednesday October 7, 2026 11:20 - 12:00 CEST
One goal of containers is to provide an illusion: that a group of
processes are in a world of their own, and that there are no other processes on the system. In this session1, we'll look at the nature of that illusion and–through a series of experiments and live demonstrations–examine the various Linux mechanisms–namespaces, capabilities, cgroups (control groups), and seccomp–are used to support the creation of that illusion. (Bring a laptop with a recent Linux distro installed!)
Speakers
avatar for Michael Kerrisk

Michael Kerrisk

Trainer/author/programmer, man7.org Training and Consulting
Michael Kerrisk is a trainer, programmer, and author of "The Linux Programming Interface", a widely acclaimed book on Linux (and UNIX) system programming. From 2004 to 2021, he maintained the Linux "man-pages" project, which provides the primary documentation for Linux system calls... Read More →
Wednesday October 7, 2026 11:20 - 12:00 CEST
Terrace 2A (Floor 2)
  Open Source 101

13:30 CEST

Making the Kernel Chat: How To Get Debug Output - Richard Weinberger, sigma star gmbh
Wednesday October 7, 2026 13:30 - 14:10 CEST
When starting with Linux kernel development, beginners quickly encounter a frustrating roadblock: system crashes that produce absolutely no output, neither on the screen nor in the logs. Fortunately, Linux provides a rich toolbox designed to extract debug information even in the most desperate situations. The main challenge is knowing which tool fits a specific scenario and what data to expect.

In this talk, Richard shares practical guidance on the debugging mechanisms he has relied on over his past decade of working inside the Linux kernel. Attendees will learn how to break through the silence by deploying the right tool for the right type of crash. Besides well known mechanisms such as earlyprintk, pstore, and ftrace, Richard will reveal lesser known Linux debugging gems used to capture logs from freezing systems, trace internal behavior, and retrieve postmortem panic data.

By the end of the talk, beginners will have a clear and actionable roadmap for diagnosing actual kernel issues, ensuring they know exactly what to do the next time the kernel suddenly goes quiet.
Speakers
avatar for Richard Weinberger

Richard Weinberger

CTO, sigma star gmbh
Richard Weinberger is co-founder of sigma star gmbh where he offers consulting services around Linux and IT security. Upstream he maintains various subsystems of the Linux kernel such as UserModeLinux and UBIFS. Beside of low level and security aspects of computers he enjoys growing... Read More →
Wednesday October 7, 2026 13:30 - 14:10 CEST
Terrace 2A (Floor 2)
  Open Source 101

14:25 CEST

Derivative Work and Modification(s): Where Copyright and Open Source Software Collide - Yet Again - Eleftheria Stefanaki, Nokia Technologies & Jimmy Ahlberg, Ericsson
Wednesday October 7, 2026 14:25 - 15:05 CEST
Talking points:

• Copyright law as a (wrong) playing field for open source software
• Working with what we have – the curious case of modifications
• Modification of software – what does this mean practically (e.g., bug fix, alteration of existing code, new code)
• Derivative work and modification in FOSS licensing
• Practical cases and “risks”
o Products
o M&As


Abstract:
There are many legal concepts that create havoc in the open source world, but only a few are as “scary” as the concept of modification and derivative work. Copyright law concept are challenging to adopt in the software context. The ambiguity of the legislation as well as the case law in many jurisdictions, such as the US and many EU countries and institutes, is proof enough that this is a convoluted topic, and not just in theory. The practical impact of derivative works and modifications runs through the entirety of the open source compliance process. In this session, we will attempt to demystify the aforementioned concepts and possibly open up more questions for discussion.
Speakers
avatar for Eleftheria Stefanaki

Eleftheria Stefanaki

FOSS Legal Counsel, Nokia Technologies
I am a lawyer from Greece, specialized in technology and passionate about open source. I have started my 'open source journey' in Ericsson, assisting and participating in the activities and day-to-day of the OSPO since 2022. Currently, I am the FOSS Legal Counsel for Nokia Technologies... Read More →
avatar for Jimmy Ahlberg

Jimmy Ahlberg

Expert & Senior Legal Counsel, Ericsson
Currently Mr Ahlberg is the Director of Open Source Policy with the Ericsson OSPO. Prior to the inception of the Ericsson OSPO he worked in different roles with various aspects of Open Source in the Ericsson organization, This included consumption of and contribution to Open Source... Read More →
Wednesday October 7, 2026 14:25 - 15:05 CEST
Terrace 2A (Floor 2)
  Open Source 101

15:35 CEST

Your Backup Data Doesn't Belong To You - Julien Castets, Plaklar
Wednesday October 7, 2026 15:35 - 16:15 CEST
You can rebuild your infrastructure from a git repo and migrate workloads across clouds. Your backup data is locked in a proprietary format, on vendor hardware, encrypted with keys you don't fully control. This talk applies the open-source portability argument to resilience, and examines what genuine backup ownership actually requires: open formats, storage-backend independence, and key custody that stays with the data owner.
Speakers
avatar for Julien Castets

Julien Castets

Software Engineer, Plaklar
Julien Castets is a French software engineer based in Prague, Czech Republic. Passionate about infrastructure, he previously worked at cloud providers Scaleway and Koyeb as a DevOps and backend engineer, and now works at Plakar, an open-source backup platform, where he focuses on... Read More →
Wednesday October 7, 2026 15:35 - 16:15 CEST
Terrace 2A (Floor 2)
  Open Source 101

16:30 CEST

A Day in the Life of a CVE Remediator - Shubham Kalloli & Cameron Scholes, Ericsson Software Technology
Wednesday October 7, 2026 16:30 - 17:10 CEST
This talk will focus on a day in the life of CVE remediators. It will go through the full process of identifying, resolving, upstreaming and following up CVEs in various dependencies. It will also go through the various Open Source tools that we use throughout the full process, touch on our experiences working upstream and go through how we are sharing this knowledge and experience internally.
Speakers
avatar for Shubham Kalloli

Shubham Kalloli

Senior Software Engineer, Ericsson Software Technology
Senior Software Engineer at Ericsson Software Technology working in the Open Source Community
avatar for Cameron Scholes

Cameron Scholes

Software Engineer, Ericsson Software Technology
Cameron is a software engineer working for Ericsson Software Technology in Ireland for over 3 years. He has been working in many different open-source projects and communities with a focus on the security supply chain and CVE remediation upstream. He has experience with many different... Read More →
Wednesday October 7, 2026 16:30 - 17:10 CEST
Terrace 2A (Floor 2)
  Open Source 101

17:25 CEST

5 Practical Tips To Improve Your Log File Analysis Efficiently - Syed Usman Ahmad, Grafana Labs
Wednesday October 7, 2026 17:25 - 18:05 CEST
Linux now stands as the most widely used operating system for production and development environments, as it provides a lot of services (daemons) and tools for debugging.

One core part are the log files which is widely used. You can use built-in commands such as less, grep, awk/sed or tail for log analysis, but there are times when you need some more advanced commands or tools that can help to investigate large log files efficiently.

In this talk, you will learn five practical tips to view your log files for analysis. You will learn about Open Source tools that can make your job easier for your daily tasks.

Join us to learn more about Linux, log analysis, aggregation tools, and the value of Open Source Community.
Speakers
avatar for Syed Usman Ahmad

Syed Usman Ahmad

Staff Developer Advocate, Grafana Labs
Usman is a Staff Developer Advocate at Grafana Labs from Nuremberg, Germany and works with the Open Source community on the community forum, GitHub and Slack.

He has over 15 years of experience in IT and Cloud Support where he served multiple customers all over EU, US and Japan.
... Read More →
Wednesday October 7, 2026 17:25 - 18:05 CEST
Terrace 2A (Floor 2)
  Open Source 101
  • Audience Experience Level Any
 
Thursday, October 8
 

10:50 CEST

K8s Dungeon Crawl: Learning Kubernetes Controllers and Webhooks Through a Roguelike Project - Kim Schaefer, Game Plan Tech
Thursday October 8, 2026 10:50 - 11:30 CEST
In this session, we’ll explore Kubernetes controllers, CRDs, and admission webhooks using K8s Dungeon Crawl: a modified roguelike game where in-game monsters are represented by live Kubernetes resources running in the cluster.

As gameplay unfolds, the Kubernetes control plane becomes part of the game itself. Monsters are represented as Kubernetes Deployments, dungeon entities are modeled as CRDs, and admission webhooks dynamically mutate and validate cluster behavior as gameplay progresses.

Using KubeBuilder, we’ll walk through how controllers and webhooks interact with the Kubernetes API while demonstrating reconciliation loops, admission control, CRDs, declarative state management, runtime policy enforcement, and event-driven Kubernetes behavior.

The session demonstrates controllers reconciling game and cluster state, mutating and validating admission webhooks, GitOps deployment using Helm and Argo CD, and observability with Prometheus and Grafana.

Rather than treating Kubernetes concepts as abstract control-plane mechanics, this session turns them into visible gameplay interactions that make Kubernetes behavior easier to understand and reason about.
Speakers
avatar for Kim Schaefer

Kim Schaefer

Senior DevOps Engineer, Game Plan Tech
Kim Schaefer is a Senior DevOps and Cloud Engineer focused on Kubernetes, GitOps, and secure platform engineering. She designs and operates production Kubernetes platforms with a focus on deployment reliability and automation in constrained environments.

Kim's work centers on bu... Read More →
Thursday October 8, 2026 10:50 - 11:30 CEST
Terrace 2A (Floor 2)
  Open Source 101

11:40 CEST

Hardening Your Software Supply Chain, Pin Your Actions and Patch Your Dependencies - Richard Tweed, Tessl
Thursday October 8, 2026 11:40 - 12:20 CEST
2026 has been a big year for supply chain attacks. Shai-Hulud, TeamPCP and others are determined to weaponise open source to hack our communities.

In this talk I'll show you tools and techniques you can use to defend your projects against them, and common pitfalls
Speakers
avatar for Richard Tweed

Richard Tweed

Member of Technical Staff - Leading security and infrastructure, Tessl
Richard Tweed is the security, compliance and infrastructure person at Tessl. He's the OWASP Project Lead and Lead Maintainer for [Github-Workflow-Updater-Extension](github.com/OWASP/GitHub-Workflow-Updater-Extension/) and the lead maintainer of [kube-audit-rest](https://github.c... Read More →
Thursday October 8, 2026 11:40 - 12:20 CEST
Terrace 2A (Floor 2)
  Open Source 101

13:50 CEST

Observability Signals Outages Before They Happen: Lessons from MySQL - Igor Donchovski, Planetscale
Thursday October 8, 2026 13:50 - 14:30 CEST
Most MySQL incidents don't start with downtime, they start with small changes that go unnoticed for weeks or months.

This session focuses on operational trend analysis rather than real-time monitoring. We'll explore how growing full table scans, rising temporary table usage, lock contention, redo log pressure, buffer pool inefficiencies, and index bloat can reveal future performance and stability issues long before users are affected.

Through practical examples, attendees will learn how to identify meaningful signals, separate noise from actionable insights, and build lightweight monitoring approaches that provide long-term visibility into database health.

Whether you're a DBA, SRE, platform engineer, or developer responsible for production systems, you'll leave with a practical framework for understanding MySQL health over time.
Speakers
avatar for Igor Donchovski

Igor Donchovski

Enterprise Support Engineer, Planetscale
Most database problems aren't really database problems. They're problems nobody had time to look at closely until things started breaking.
Looking closely is the part I love. For 20+ years I've dug into why systems get slow, cost too much, or can't handle more users and turned th... Read More →
Thursday October 8, 2026 13:50 - 14:30 CEST
Terrace 2A (Floor 2)
  Open Source 101

14:40 CEST

Ship Less: Scoping Open Source Contributions That Actually Merge - Yurii Bliuchak, Apify
Thursday October 8, 2026 14:40 - 15:20 CEST
Most first contributions fail before the code does. They try to solve too much, touch too many files, and stall in review while the maintainer waits for a smaller entry point that never comes.

Adding HTTPS support to proxy-chain, a Node.js proxy library used across the web-scraping ecosystem, taught me this the hard way. My first attempt was comprehensive: tunnel support, byte accounting, certificate handling, the works. It went nowhere. What merged was a version that did one thing and stopped.

We'll use that contribution as a case study in scoping. The technical context matters, because it's a great example of hidden complexity: TLS changes proxy semantics in ways that aren't obvious until you're counting bytes and realising the handshake traffic your code never sees is inflating every number. But the talk is really about the decisions behind the code - how to identify what "done" looks like before you start, how to read a maintainer's priorities from their issue tracker, and how to negotiate a PR boundary that gets merged rather than praised and ignored.

You'll leave with a framework for scoping contributions that ship, and a clearer sense of when doing less is the right call.
Speakers
avatar for Yurii Bliuchak

Yurii Bliuchak

Engineering Team Lead at Apify, Apify
Yurii Bliuchak is an Engineering Team Lead at Apify, where his team maintains proxy-chain, an open-source Node.js proxy library used widely in the web scraping ecosystem. Over 14 years, he has gone from test automation to leading distributed teams on mission-critical, large-scale... Read More →
Thursday October 8, 2026 14:40 - 15:20 CEST
Terrace 2A (Floor 2)
  Open Source 101

15:50 CEST

Ask for Help Like a Pro! - Jakub Scholz, Cloudera
Thursday October 8, 2026 15:50 - 16:30 CEST
Open source communities are like a busy marketplace from some fantasy book. They are crowded, full of magic, and have all kinds of information. You will meet there many different characters: the wizards who saw everything twice and have every answer; the newbies who just landed and are completely lost; or the jumpy folks looking desperately for some quick fix for their production issue. It can be an intimidating place and it can be hard to find the right answers. This talk will try to help you navigate it. What are the differences between commercial support and community help? How do you find the right channel for your questions? What are the things you should always include when asking for help with some problem? How to deal with confidential data in your logs or configurations? This talk will try to answer all these questions and more. It will help you to ask for help like a pro and get the best answers quickly to get your systems up and running as soon as possible.
Speakers
avatar for Jakub Scholz

Jakub Scholz

Engineer, Cloudera
Jakub is a CNCF Ambassador and engineer at Cloudera with deep expertise in Kubernetes, streaming, and messaging. As a co-founder and maintainer of the Strimzi project, he has spent years bridging the gap between Apache Kafka and cloud-native infrastructure. Before his time at Cloudera... Read More →
Thursday October 8, 2026 15:50 - 16:30 CEST
Terrace 2A (Floor 2)
  Open Source 101

16:40 CEST

How One Open Source Program Changed the Direction of My Career - Saumya Singh, IBM
Thursday October 8, 2026 16:40 - 17:20 CEST
In 2018, I applied to an open source program with no expectations.

I wasn't from a well-known college. I didn't have a strong professional network. Like many students, I was simply looking for a way to learn, gain experience, and figure out where my career was headed.

That single application led to opportunities I could never have predicted.

Over the next few years, open source introduced me to mentors, global communities, speaking opportunities, internships, scholarships, leadership roles, and eventually a full-time career in technology. More importantly, it changed how I viewed learning, collaboration, and my own potential.

This session is a personal story about how one open source opportunity created a ripple effect that shaped an entire career.

Along the way, I'll share the practical lessons I learned about contributing to projects, building relationships within communities, overcoming self-doubt, and creating opportunities that don't exist in traditional classrooms.

Whether you're a student, an aspiring contributor, this talk offers a realistic look at how community-driven programs can create life-changing opportunities.
Speakers
avatar for Saumya Singh

Saumya Singh

Software Engineer & Tech Influencer, IBM
Saumya Singh is a Software Engineer, Educator, and Tech Influencer with an audience of 1M+ developers across social media. Based in India, she has over 5 years of experience in Kotlin, Android Development, Open Source Technologies, and AI. Through her content, she helps students... Read More →
Thursday October 8, 2026 16:40 - 17:20 CEST
Terrace 2A (Floor 2)
  Open Source 101
 
Friday, October 9
 

11:05 CEST

Small Language Models 101: Why Bigger Isn't Always Better - Mohit Gaur, Microsoft
Friday October 9, 2026 11:05 - 11:45 CEST
Large Language Models often dominate headlines, but many real world AI applications don't need billions of parameters to be effective. Tasks such as classification, information extraction, intent detection, summarization and domain specific assistants can often be served effectively by smaller open source models with lower latency, reduced infrastructure requirements and improved privacy.

This session introduces Small Language Models (SLMs), explores the trade-offs between model size, accuracy, cost and performance and discusses techniques such as quantization, distillation and domain adaptation that make these models practical for deployment on laptops and edge devices.

Attendees will leave with a framework for selecting the right model for a given use case, understanding why bigger is not always better and how open-source SLMs are making AI more accessible to developers and organizations with limited compute resources.
Speakers
avatar for Mohit Gaur

Mohit Gaur

Software Engineer 2, Microsoft
Mohit Gaur is a software engineer at Microsoft with a passion for exploring new tools and sharing insights that help others harness the full potential of technology. He thrives on collaboration and mutual success and is guided by the belief that every challenge holds the potential... Read More →
Friday October 9, 2026 11:05 - 11:45 CEST
Terrace 2A (Floor 2)
  Open Source 101

11:55 CEST

Minimal Viable AI Platform - Max Körbächer, Liquid Reply
Friday October 9, 2026 11:55 - 12:35 CEST
Creating your own AI platform sounds like a job for a funded team and a matching cloud bill. Surprisingly, it isn't. I want to show how a handful of open source tools combine into a minimal viable AI platform that runs on one machine from a single Docker Compose file.
Five layers are all needed for a valuable platform: LiteLLM as the gateway (one API for any model, with keys and cost tracking), Open WebUI as the chat interface, n8n for automation and agents that take real actions, Ollama for private local models, and Langfuse for request tracing.
Then we look at how to grow it (RAG, authentication, scaling) without adding a pile of disconnected tools. This setup can be advanced for every demand.
The setup is indeed not perfect, but it is a valid starting point for organizations of any size.
No enterprise budget needed, just you, some OSS tools and a little bit of interest.
Speakers
avatar for Max Körbächer

Max Körbächer

Chief Technology Advisor & CEO, Liquid Reply
Max Körbächer is the Founder and Chief Technology Advisor at Liquid Reply, a CNCF Ambassador and Governing Board Member, LF Europe Advisory Board member and the author of the book Platform Engineering for Architects. Max specializes in translating the crushing complexity of cloud... Read More →
Friday October 9, 2026 11:55 - 12:35 CEST
Terrace 2A (Floor 2)
  Open Source 101

14:00 CEST

The Foundational Misnomer Hiding in Plain Sight - Powen Shiah, Sovereign Tech Agency
Friday October 9, 2026 14:00 - 14:40 CEST
"Foundation" is a word that carries weight: endowments, permanence, institutional resources. In the philanthropic world, foundations often have millions or billions in their endowments. In open source, the same word describes organizations that range from trademark holders and event hosts to genuine funders of development work.
That gap between expectation and reality matters. When developers, companies, and governments hear "foundation," many assume someone already has it covered. That assumption is one reason so many critical open source projects remain underfunded: the name signals security that often doesn't exist.
This talk unpacks the spectrum of what open source foundations actually do and don't fund, why the word creates a misleading picture of available resources, and what genuine infrastructure funding looks like in practice. Drawing on the work of the Sovereign Tech Agency, which funds critical open source projects and the ecosystem infrastructure sustaining them, this session offers a clearer picture of where the money is, where it isn't, and what that means for the long-term health of open source.
Speakers
avatar for Powen Shiah

Powen Shiah

Communications Lead, Sovereign Tech Agency
Powen handles communications at the Sovereign Tech Agency, highlighting the importance of open source digital infrastructure and the government's role in supporting it in the public interest. He’s worked in product marketing, communications, and internationalization in technology... Read More →
Friday October 9, 2026 14:00 - 14:40 CEST
Terrace 2A (Floor 2)
  Open Source 101
  • Audience Experience Level Any

14:50 CEST

Landscape of the Quantum Open Source Ecosystem - Mathys Rennela, Unitary Foundation
Friday October 9, 2026 14:50 - 15:30 CEST
The discussion on quantum computers often focuses on abstract physics, but for the engineers manipulating those systems, the underlying software stack is becoming a very pressing reality. As the field matures, we are witnessing the emergence of a collaborative, open-source ecosystem.

This session provides a comprehensive tour of the current quantum open source landscape, and will aim to demystify programming for quantum computers. Community-led projects are currently providing the necessary plumbing (compilers, simulators, verification tools, ...) to ensure that quantum technologies are not only scalable and useful, but also transparent and interoperable.

No prior background in quantum physics or quantum computing is required. The session will actually aim to argue that most quantum software challenges are very known problems in software engineering and computer science, and that one can contribute to quantum open source projects without any knowledge of quantum physics.
Speakers
avatar for Mathys Rennela

Mathys Rennela

Fellow, Unitary Foundation
Mathys Rennela is a quantum software researcher. His main focus is on building the foundational & open source quantum software infrastructure to ensure that quantum computers can also be transparent & of public utility.
Friday October 9, 2026 14:50 - 15:30 CEST
Terrace 2A (Floor 2)
  Open Source 101
  • Audience Experience Level Any

15:40 CEST

Kids Programming in Turtlegrove - Making Beautiful Things Together - Pascal van Dam, pascalvandam.com
Friday October 9, 2026 15:40 - 16:20 CEST
In 1967, Seymour Papert, Wally Feurzeig, and Cynthia Solomon built a language based on studies of Piaget whose radical premise still hasn't been fully cashed in: children should program the computer, not be programmed by it. Logo gave them a turtle an "object to think with" and a place to live in mathematics by walking it, drawing it, and making it their own.

Half a century later, most kids meet software as something to consume, not construct. This talk argues that Papert's constructionism and the free-software ethos are the same idea one generation apart, both are about the freedom to understand and reshape your own tools and that open source is exactly how we finally deliver Logo's promise at scale.

I'll show TurtleGrove: a UCBLogo compatible interpreter we created that runs in any browser, with a Rust core and a vanilla-JS frontend, fully open source and self-hostable.

In the OpenSource mindset children can even show-and-share their code with other children. Working on their own canvas or creating art together. Children learn the best, when learning together. We use this also in the Living OpenSource project to introduce kids in African countries into programming.
Speakers
avatar for Pascal van Dam

Pascal van Dam

Trainer & Architect, pascalvandam.com
Pascal has been working with Linux and Opensource since the early days of 1991. He's having almost 30 years of experience in of UNIX and Linux. He has been delivering courses since 1997.

Next to being a trainer Pascal is the hired Linux/K8S architect for ATOS.

Pascal has a fond... Read More →
Friday October 9, 2026 15:40 - 16:20 CEST
Terrace 2A (Floor 2)
  Open Source 101

16:30 CEST

Generative AI and FOSS - Not Just the How but Also the Why - Carol Chen, Red Hat
Friday October 9, 2026 16:30 - 17:10 CEST
I've given several talks & workshops on various GenAI tools in the past couple of years. Generally the goals of the presentations are to demonstrate the how - how to fine tune a model, how to prepare data for RAG systems, how to use this framework or optimize that pipeline - I find that a lot of the discussions which happen during and after the workshop are around the why.

Why is structured data important? Why do we care about open source and open weights in models? Why does context size matter? Why can't I run/reproduce the same AI set up on my laptop? Why do I even have to use GenAI??

These and many more questions have popped up and quickly drowned in the rush to keep up with the next new AI tool or agent. I'd like to provide a space for everyone, especially those new to GenAI and/or open source, to pose these questions and discuss them without worring about missing out. Whether you are a skeptic or have your fully agentic workflow set up, we might share similar concerns and doubts. Bring your ideas and opinions!

During the BoF, I will also share various open source resources that may be relevant and useful in answering your questions and better prepare you on the AI journey.
Speakers
avatar for Carol Chen

Carol Chen

Principal AI Community Architect, Red Hat
Carol Chen is a Community Architect at Red Hat, having led several upstream communities including InstructLab, Ansible and ManageIQ. She has been actively involved in open source communities while working for Jolla and Nokia previously. In addition, she also has experiences in software... Read More →
Friday October 9, 2026 16:30 - 17:10 CEST
Terrace 2A (Floor 2)
  Open Source 101
 
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