Jonas Chevalier
Director at Numtide
Satigny, Geneva, Switzerland
Summary
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RockstarJonas Chevalier is a Director and hands-on engineering leader with 12 years of experience building production infrastructure, developer tooling, and commercial teams around NixOS and DevOps practices from Geneva. He founded and scales Numtide, assembling Nix/DevOps experts while still contributing code to foundational projects like the Nix package manager and Home Manager. Technically versatile, Jonas has shipped backend, DevOps and full‑stack improvements—from nix repl features and S3 examples to CI, packaging and build-system refactors—plus work on high‑visibility repos such as nix and Homebrew. He brings startup‑speed product delivery experience from roles at Pusher and BCG Digital Ventures and a pragmatic focus on reproducible, minimal tooling (he’s obsessive about Nix and builds minimalist CLIs). Pragmatic and detail-oriented, Jonas often combines system architecture changes with small UX fixes and documentation updates that unblock teams and users.
12 years of coding experience
20 years of employment as a software developer
English, French, German
Stackoverflow
752reputation
117kreached
11answers
2questions
Github Skills (83)
dependency-management10
env10
package-management10
nix10
testing10
bash10
dotfile10
home-manager10
ruby10
automation10
build-automation10
declarative10
composer10
javascript10
nixos10
Programming languages (34)
Github contributions (5)
numtide/devshell
Aug 2020 - Aug 2022
Per project developer environments
Role in this project:
DevOps Engineer
DevOps EngineerContributions:53 reviews, 155 commits, 171 PRs in 2 years
Contributions summary:Jonas primarily focused on improving the developer experience within the `devshell` project. Their contributions include streamlining the build process by simplifying and refactoring the code, allowing users to specify custom commands through a configuration file. They also introduced the functionality to manage git hooks and integrated a module to support PostgreSQL. The changes demonstrate a focus on automating tasks, adding new features, and optimizing the overall workflow.
gitpoddirenvtomldotfilesnvm
direnv/direnv
Oct 2013 - Jan 2023
unclutter your .profile
Role in this project:Back-end & DevOps Engineer
Back-end & DevOps EngineerContributions:34 releases, 92 reviews, 466 commits in 9 years 4 months
Contributions summary:Jonas primarily contributed to the backend functionality of the project, specifically focusing on the environment variable management features. Their work included fixing bugs, refactoring code for improved error messages and handling, and enhancing the flexibility of the `.env` file parsing and shell hook integrations. The user also worked on adding tests for special configuration variables and improved the build system by introducing a Nix-based build and cross-platform installations.
zshdirenvtcshbashenvironment
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