NixCon 2025

Interested in all things nix.

Freelance Nix consultant and author of many tools in the Python/Nix space such as poetry2nix, pyproject.nix and uv2nix.
In nixpkgs he mostly enjoys working on lower level plumbing such as lib & stdenv, but also maintains Emacs & it's package ecosystem.
Python developer in a previous life.

NixOS developer

Alex is contracting for ASML, spearheading migration to Bazel build system. He enjoys solving complex challenges in a manner that results in simple solutions. Rust, Nix and Bazel enthusiast, he attempts to bring reproducibility and correctness to any software project he works on.

Hi, I'm a software developer working at garnix. I've been spending the past few years tinkering with nix in my homelab in my free time.

I use Nix

TODO: will expand it if the CFP is approved

Software engineer from Goiânia, Brazil, 28 years old. Working with Elixir in banking, focusing on backend and DevOps. Interested in functional systems, infrastructure, and the Nix ecosystem.

Daniel is engineer and mathematician turned software developer. He found Nix in late 2021 and has been supporting the NixOS marketing team nearly as long.

Nix enthusiast

SRE by trade, but my interests lie in security, decentralization, radio communications, self-hosting and automation.
FOSS contributor to various projects, blog available at https://blog.erethon.com/, recently fell in love with NixOS.

I'm mainstreaming Nix using cachix.org and devenv.sh

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Guillaume Maudoux (a.k.a @layus on GitHub and elsewhere) is an engineer and researcher specialized in build systems.

Based in Belgium, Guillaume blends a background in computer science, engineering, and applied mathematics with strong interests in correctness, reliability, and efficiency in software systems.

Guillaume works at Tweag’s Scalable Build Systems group. A team of engineers and researchers focused on developer productivity, robust tooling, and enterprise-scale build performance. His work focusses on integrating Nix into Bazel and in particular supporting remote execution. For some reason his skills are most appreciated in the robotics industry.

You may find him contributing to random open source projects because he never resists fixing a bug he found, and digging to uncover the root cause of problems. He will happily share his findings in blogs, conferences or around a coffeeC-w tea.

Guillaume’s reputation stems from his ability to bridge academic rigor with systems engineering pragmatism. His work helps teams build complex software more reliably, efficiently, and at scale.

Jacek Galowicz is the CEO of Nixcademy and Applicative Systems GmbH (DE) and Corp. (US), where he has trained over 400 engineers in Nix and NixOS and helped numerous companies accelerate their adoption of Nix. Before that, Jacek co-founded Cyberus Technology GmbH, where he worked on hypervisor technology and advanced test automation. He has an extensive background in the security and operating systems industries, and as a software engineer, Jacek ported the NixOS integration test driver to Python in 2019. He is also the author of the C++17 STL Cookbook.

João Thallis is a Product Engineer at Turn.io.

He started his programming journey creating games in his teenage years. He’s working with functional programming using Elixir since 2018.

He lives in Brazil, loves cycling, traveling, open source, nix and neovim

My website: https://joaothallis.com

Working on developer tooling at Shopify from Saskatoon, Canada.

Julian was born in Brazil, but has lived in India, the US, Germany and now Switzerland. He is the CEO of garnix; prior to that, he variously cowrote the Haskell servant web framework, worked at a newspaper, started but never finished a philosophy PhD, and was Brazilian chess champion under 16.

Kavisha Kumar is a Bazel Build Architect at ASML. A recent Nix convert, she brings a fresh perspective on what it’s like to learn Nix from scratch. Her journey from confusion to clarity has made her passionate about improving the onboarding experience for newcomers.

She/Her

Programmer and CS student at Purdue University, spending way too much time on the internet.
I found Nix and NixOS late 2020/early 2021 and have been obsessed ever since.
I'm also the one with the receipt printer.

Lukas Beierlieb is a software engineer at Cyberus Technology and a PhD student at the University of Würzburg, both with a focus on virtualization technology. He does not want to imagine a world in that development systems and environments are not managed with Nix.

Hi, I'm a software engineer and primarily work on tools and systems to improve developer productivity.

Matti has been involved in Open-Source development for many years, and now primarily works on building Gitea, an open-source Git and CI/CD service, and numerous other projects.

• CS undergrad (B4) @ University of Tsukuba
• Interested in Nix, software engineering and compiler toolchains
• https://momee.mt
• https://x.com/mutsuha_asada

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Founder and CEO of genki instruments. Engineer, musician, Icelandic.

Hi I'm Qubasa, I'm a systems developer and part of the clan.lol project.
I have a passion for solving complex technical challenges, and Nix is my tool of choice for managing complexity.

Nix Steering Committee, Nix team member, NixOps maintainer, Hercules CI founder

Rok is an Engineer at Flox.

Wherever he worked, he put users first, either as a Release Engineer at Mozilla or as a consultant at Tweag. UX/DX became the language to "talk" to the users. Knowing that communicating the ideas is as important as having the technical skill is what makes Rok stand out. Understanding users and knowing how to talk to them is what brings a smile to Rok's face every day.

Ron is CEO and co-founder of Flox and President of the NixOS Foundation. A former software engineer and leader in large-scale product development, Ron led developer products at Meta, supporting 20,000+ engineers. Realizing the limitations of existing tooling and recognizing the superpowers of Nix, Ron co-founded Flox to help build a more sustainable Nix and make it accessible to the wider engineering community.

Ross Turk is head of marketing and devrel at Flox. Ross brings more than 20 years of experience creating software, managing complex IT systems, and helping companies understand and serve developers.

Ryota has been immersed in Nix ecosystem for the past few years, starting with macOS originally, now to run NixOS for his main machine. In daytime he works as software engineer mainly focusing on Cloud Native ecosystem and solutions, and at night, he tinkers with Nix and Emacs.

Author of the Full Time Nix podcast and open source contributor (watch me work)

Joined the Nix community in 2017 and has gotten increasingly more involved ever since. Joined the Nix Group at Tweag in 2021. Ran the weekly Nix Hour from 2022 to 2024. Was part of the NCA to establish a Nix governance constitution and subsequently run the first Steering Committee election. A NixOS Foundation board member since 2025. One of the main organisers of this years NixCon.

Software developer at Helsinki Systems GmbH

Hi, I'm an undergraduate student at ShanghaiTech University and the president of the GeekPie Association.
Currently I'm maintaining the university's mirror infrastructure at https://mirrors.shanghaitech.edu.cn/ which runs NixOS.
I contribute to Nixpkgs and the ecosystem and I'm also a Summer of Nix 2025 participant.
Earlier the year I've hosted NixOS CN Meetup #1, the first regional conference on Nix in China.

Sönke Hahn specializes in Functional Programming and has been using nix on and off since 2013. He also has a strong interest in Agile Software Engineering, from Test-Driven Development to team organization. He is the CTO of garnix.io.

Hi there, I'm Srini. I previously worked at Apple Maps and LinkedIn, primarily in the build systems space. I'm a recent Nix convert (my primary expertise is in Bazel) and I'm looking forward to delving deep into all things nix and being a part of the community!

Long-time advocate for building software that works.
Currently building https://nix-ci.com.

Travis has a masters degree in Computer Science from George Mason University and over 25 years of professional work experience and research experience in network and system security. He has a particular interest in system automation, distributed systems, and anonymous communications; as well as protecting anything under his purview from exploitation, harm, or loss, to include ssh sessions in transit between trusted end points.

Having observed peers vocalize angst over quantum computers and having spent time trying to understand the threat and mitigation prospects of quantum computers as it relates to ssh(d), he has identified easily adopted configuration changes for ssh and sshd leveraging Nix(OS) that can help reduce the threat of quantum computers to ssh sessions.

Self-proclaimed Nix documentarian on a never-ending crusade to put the right words in the right place, convinced that programming is machine-assisted philosophy.

Weijia Wang is a PhD student at Sorbonne Université, specializing in computer algebra and real algebraic geometry.

Wessel Klein Snakenborg is passionate about technology since childhood. He launched NovaCustom in 2015, crafting tailor-made laptops with privacy and security in mind. With a focus on user-friendliness, NovaCustom continues to redefine the laptop experience, led by Wessel's commitment to innovation and collaboration.

Building with nix since before the pandemic, brought flake support to search.nixos.org, contribute to Nix and now aim to make the power of Nix more accessible to people who have something else to do.

Jobless osu! std/mania player, unprofessional sysadmin, nixpkgs committer. Still fixing mismatched closing parens )))))))))) from a college assignment. More about me here.

I hold a master’s degree in mathematics and computer science applied to biology from Sorbonne University in Paris. I discovered C++ programming as a child and have been actively involved in open-source communities ever since. My professional experience includes work in 3D graphics, developer tooling, compilers, and runtime design using Rust and Haskell. I’ve taught systems programming, computer architecture, and DevOps to master’s students, and I’ve also designed algorithm competitions and coding workshops for kids and teens, helping them build small video games. I’m currently based in Belgium, working as a NixOS consultant for Numtide. In my free time, I enjoy biking, hiking, climbing, and cooking.

I'm a man of many talents, some of which are useful. I'm an engineer at Flox working on the CLI. I'm also the Official Flox Meme Lord. I did a PhD in physics building femtosecond pulsed lasers and doing quantum mechanics simulations. I did a stint on the Nix Documentation Team. I'm an amateur curler (like the Olympic sport) and Flox sponsored my team. I'm program chair for Planet Nix. I never know where my circus of a life is going to take me next.

Zoë Kooyman is the executive director of the Free Software Foundation (FSF). She has a deep interest in the visual and digital nature of modern society, and holds a Master of Arts in Preservation and Presentation of the Moving Image from the University of Amsterdam. Here, her understanding of copyright was profoundly influenced by the concepts of copyleft and user freedom. She then spent the next years living and working around the world as a project director for a wide range of assignments, soaking up experiences along the way. She found her way to Boston and the FSF in 2019 as program manager and was named executive director in 2022.