Alejandro Colomar - Linux Man-pages Maintainer Lead Developer

Alejandro Colomar

Linux Man-pages Maintainer Lead Developer

Spain

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Summary

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Rockstar

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Top School

Alejandro Colomar is a Linux-focused systems engineer and lead maintainer of the Linux man-pages with nine years of experience crafting and modernizing C-based open-source software. He specializes in C, POSIX, shell scripting, Git, and container workflows, and is committed to working exclusively on open-source C projects with remote-first collaboration. Alejandro has contributed substantial refactors and API improvements to projects like NGINX Unit and shadow, improving safety, readability, and modern standards compliance across core system components. He has held principal engineering and DevOps roles (including at NGINX) and maintains stable releases for shadow-utils, demonstrating both release stewardship and low-level codecraft. Based in Spain, he pairs an engineering background in electronics/automation with hands-on maintenance of critical Linux documentation and tooling—an uncommon combination that bridges hardware-minded rigor with kernel-adjacent software craftsmanship.

10 years of coding experience

6 years of employment as a software developer

Various courses, Various courses at edX

Industrial Organization Engineering, Industrial Organization Engineering at Universidad Politécnica de Cartagena

Various courses, Various courses at Cognitive Class

Electronic & Computer Engineering, Electronic & Computer Engineering at Institute of Technology, Sligo

Various courses, Various courses at MITx Courses

Universitat Politècnica de València

Smart Manufacturing & Robotics Delft (minor), Smart Manufacturing & Robotics Delft (minor) at De Haagse Hogeschool / The Hague University of Applied Sciences

Academia Básica del Aire

English, Spanish, Catalan

Stackoverflow

Stats

4,358reputation

3.4mreached

83answers

94questions

Github Skills (19)

c-language10

posixct10

system-programming10

c1110

refactor10

c1710

computer-engineering10

posix10

refactoring10

cprogramming-language10

apidoc8

api8

develop7

errno6

pointer6

Programming languages (18)

JavaC++CSSCRustMakefileTeXHTML

Github contributions (5)

shadow-maint/shadow

Dec 2021 - Jan 2023

Upstream shadow tree

Role in this project:

Back-end Developer

Contributions:11 releases, 1383 reviews, 110 commits in 1 year 1 month

Contributions summary:Alejandro primarily contributed to the shadow project by refactoring and simplifying the codebase. They removed redundant code, eliminated preprocessor directives (like `HAVE_STRFTIME`) by assuming standard C functionality, and replaced older functions (like `gethostbyname` and `getpass`) with more modern and standard alternatives. Furthermore, the user improved code readability and maintainability by using standard library calls and applying consistent coding practices.

upstreamshadow

nginx/unit

Dec 2021 - Dec 2022

NGINX Unit - universal web app server - a lightweight and versatile open source server that simplifies the application stack by natively executing application code across eight different programming language runtimes.

Role in this project:

Back-end Developer

Contributions:441 reviews, 54 commits, 86 PRs in 1 year

Contributions summary:Alejandro primarily focused on code cleanup and refactoring within the NGINX Unit project. Their contributions included fixing indentation inconsistencies across multiple source files, improving code readability and maintainability. They also added new array APIs and modified existing code to leverage the new APIs. Additionally, the user corrected code style and addressed potential undefined behavior issues.

appservernginx-unitprogramming-languageruntimes

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