Building systems
Crafting solutions
We’re a team of independent principal engineers who love Open Source and building custom systems and infrastructure for teams that focused on getting things done – no sales layer, no middle management.
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How we help
your team.
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Software Development
We partner with your engineers to deliver custom infrastructure and system development—solving real problems fast and integrating seamlessly into your existing stack.
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Research & Development
We build custom tools and infrastructure tailored to your workflows, working closely with your team from idea to deployment.
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Commercial NixOS Support
We provide hands-on NixOS commercial support to help your team build, maintain, scale, and troubleshoot reliable systems faster.
Here is the
tech we use.
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Nix / NixOS
We’re not just deeply embedded in the ecosystem but use Nix as our superpower to make delivery faster and systems more reliable. We can migrate your project or infrastructure to Nix, pair with your team, and teach you the patterns to stay independent. If Nix isn’t the right fit, we’ll use whatever tools best match your situation.
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Sovereign infrastructure
We build infrastructure you fully own: no proprietary layers, no managed-service traps, no vendor lock-in. By using Nix, we make environments reproducible and auditable: pinned dependencies, repeatable builds, and traceable deployments. You get the source, documentation, and know-how to run it yourself and move it wherever you need.
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LLMs
LLMs are evolving fast. We help you apply them pragmatically where they create real leverage. Our focus stays the same: high-quality, maintainable code and engineering outcomes you can trust. On spec-heavy work, we’ve used LLM-assisted workflows to reduce effort significantly passing hundreds of hours of savings back to customers.
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Open Source
We maintain and contribute to open source tools that Nix stacks rely on. Working with Numtide means you’re not only getting senior engineering help, but also supporting the ecosystem, your infrastructure depends on. That feedback loop makes your platform stronger over time.
What teams say about us
Meet the magic behind.
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Jonas Chevalier
Founder
Switzerland- Herding of Geeks
Jonas founded Numtide and created direnv, a per-directory environment manager used by thousands of developers worldwide. He has been shaping the NixOS ecosystem for over 10 years, helping establish the NixOS Foundation, NixCon, and the nix-community organization. When not running the business, he builds tools like treefmt and system-manager to solve real-world infrastructure problems.
Projects
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Dragan Milic
Team Lead
Switzerland- Distributed Networking
- Databases
- Ethereum
Dragan has a PhD in distributed overlay networks from the University of Bern and a track record of shipping under pressure -- from backend systems at Monzo Bank to leading the Arkiv Network team, where he took an Ethereum L3 data platform from zero to mainnet. Give him a big technical problem and a team, and he will deliver.
Projects
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Jorg Thalheim
Germany- Builder of tools
- Chief of Automation
Jorg is one of the most prolific toolmakers in the Nix ecosystem. With a PhD from the University of Edinburgh, he created sops-nix, nixos-anywhere, and nix-direnv -- tools with thousands of stars each that are now standard in NixOS workflows. He currently leads the Clan project and serves on the Nix and NixOS infrastructure teams.
Projects
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