David Arnold

Gräfelfing, Bavaria, Germany

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Summary

🤩

Rockstar

David Arnold is a multilingual, entrepreneurial technologist with 12 years' experience blending DevOps, backend engineering, and system architecture from Gräfelfing, Bavaria. He excels at Nix-based infrastructure, reproducible builds and deployment tooling—contributing to influential projects like nixos-generators, devshell, colmena and disko—while also improving backend reliability in Python projects such as Frappe/ERPNext. Comfortable across the stack, he moves between CI/CD, storage migrations (GridFS), Redis queue hardening, and rigorous test automation to raise system resilience. David favors humanistically informed cybernetic management: combining business development instincts with pragmatic technical leadership to turn complex systems into maintainable, auditable workflows. An avid open-source maintainer and problem-solver, he often focuses on reducing dependency bloat and streamlining flake-based workflows—small structural changes that yield outsized operational gains.

12 years of coding experience

Github Skills (86)

python10

nix10

testing10

system10

automation10

f10

assert10

backend10

erp10

javascript10

filehandle10

architecture10

nixos10

editor10

kakoune10

Programming languages (31)

C#CGoHTMLTypeScriptShellAstroOCaml

Github contributions (5)

divnix/digga

Apr 2021 - Jan 2023

A flake utility library to craft shell-, home-, and hosts- environments.

Role in this project:

DevOps Engineer & System Architect

Contributions:252 reviews, 213 commits, 113 PRs in 1 year 9 months

Contributions summary:David primarily contributed to the infrastructure and architecture of the DevOS environment, focusing on the development of flake-based utility libraries. They introduced and modified Nix build definitions, including those for the bootstrap ISO and deployment pipelines. The user's commits demonstrate a focus on system configuration, module integration, and overall project structure, as evidenced by changes to the flake.nix, modules, and testing configurations.

diggahome-managercraftdotfilesshell

numtide/devshell

Oct 2020 - May 2022

Per project developer environments

Role in this project:

Full-stack Developer

Contributions:22 reviews, 11 commits, 29 PRs in 1 year 7 months

Contributions summary:David primarily focused on improving the `devshell` project, a tool for per-project developer environments. Their contributions included refactoring code to avoid escape codes, shortening menu commands, and implementing command categories. The user also enhanced the project by providing means to add extra overlays, improving code formatting and style, and refactoring the project to embrace flakes for version pinning.

gitpoddirenvtomldotfilesnvm

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