Alejandro Colomar

<alx@kernel.org>

<http://www.alejandro-colomar.es/>

Synopsis | Experience | Projects | Education | Languages | Footer |

^ Synopsis

Principal software engineer.

C, Git, Shell, Linux, POSIX, open source, security.

^ Experience

• co-maintainer @ shadow

  (2021 - present)
  • Maintain stable branches.
  • Find, report, and fix security vulnerabilities and other bugs.
  • Increase robustness of the source code.
  • shadow-4.14.7 release
  • shadow-4.15.0 release
  • shadow-4.14.6 release
  • shadow-4.14.5 release
  • shadow-4.14.3 release
  • shadow-4.14.2 release
  • shadow-4.14.1 release
  • shadow-4.14.0 release
  • shadow-4.13 release
  • shadow-4.12 release
  • shadow-4.11 release

• contributor @ NeoMutt

  (2023 - present)
  • Find, report, and fix security vulnerabilities.
  • Enhance crypto capabilities.
  • (feature) -C: Command-line crypto
  • (feature) Encryption information block
  • (vulnerability) A third party can add itself to an encrypted conversation
  • (vulnerability) A third party can resend a signed message in a different conversation
  • (vulnerability) BCC recipients in encrypted messages are leaked
  • (discussion) Message security

• Linux man-pages maintainer @ Linux

  (2020 - present)
  • Review and merge incoming patches and bug reports.
  • Test the Linux kernel and C library APIs.
  • Write technical documentation about the APIs.
  • Develop example programs using the APIs.
  • Review existing technical documentation.
  • Report detected bugs to the Linux kernel, C library or related projects.
  • man-pages-6.7 release.
  • man-pages-6.06 release.
  • man-pages-6.05 release.
  • man-pages-6.04 release.
  • man-pages-6.03 release.
  • man-pages-6.02 release.
  • man-pages-6.01 release.
  • man-pages-6.00 release.
  • man-pages-5.13 release.
  • man-pages-5.12 release.
  • man-pages-5.11 release.
  • man-pages-5.10 release.
  • man-pages-5.09 release.

• Principal software engineer @ NGINX

  (2021 - 2024)
  • NGINX Unit.
  • (feature) Design and implement a client controller program.
  • (feature) Design and implement an efficient gzip filter.
  • (feature) Design and implement a method for chaining actions in the server.
  • Programming; C
  • SCM; Git
  • Scripting; Bash
  • CI/CD; GitHub

• DevOps engineer @ SQLI

  (2020 - 2022)
  • CI/CD; Jenkins
  • SCM; Git
  • Scripting; Bash
  • Unix maintenance
  • Containers; Docker

• Senior software engineer @ EXFO

  (2021)
  • Programming; C++
  • Packaging; Conan
  • SCM; Git
  • Scripting; Bash
  • Containers; Docker

• DevOps engineer @ Academia-Online.ORG

  (2018 - 2020)
  • SCM; Git
  • Scripting; Bash
  • Programming; C, C++
  • Linux maintenance
  • Containers; Docker, Kubernetes, Openshift 4
  • CI/CD; GitHub
  • Cloud; AWS

• Baseball coach @ Béisbol Astros Valencia

  (2017 - 2018)
  • Coach the U-13 children team.

• Airman/Soldier @ Spanish Air Force

  (2011 - 2017)
  • Aircraft maintenance (military helicopters)
  • Force protection (military training)

^ Projects

• Open-source contributions:

  • Codidact

  • Conan

  • Debian

  • GCC

  • Gentoo

  • Glibc

  • Groff

  • IWYU

  • libbsd

  • Linux kernel

  • Linux man-pages

  • LLVM/Clang

  • NetBSD

  • NeoMutt

  • NGINX Unit

  • shadow-utils

  • Stack Exchange

  • Stack Overflow

  • Void Linux

  • ...

  I've contributed to the above projects with patches, bug reports, testing, reviews, suggestions, Q&A, etc.

• liba2i

  (2023 - present) A. Colomar

  C library for parsing integers.

• chessutils

  (2022 - present) A. Colomar

  *nix-style (filter) chessboard games.

• Robust internet services node

  (2020 - present) A. Colomar, S. Colomar

  High availability & high security server.

• rob_cam

  (2020) A. Colomar, S. Colomar

  Project to control a system that has cameras and robots (e.g.: a production line) in a high availability manner.  The programs are written in C and deployed using Docker & Kubernetes.

  • love.c (2020) A. Colomar

• libalx

  (2017 - present) A. Colomar

  C & C++ library providing useful extensions to common libraries.

• mine-sweeper

  (2015 - 2020) A. Colomar

  Simple game written in C.  Based on the 1990 game Mine by CurtJ, LarryH, RobD at Duff Software.

• European Project Semester: Laundry symbol reader

  (2020) A. Colomar, T. Ruis

  Project to analyze clothing labels and allow laundry automation, programmed in C (prototypes in C++ and Python).

• Coins

  (2018 - 2019) A. Colomar

  Project to accurately count money from photos of coins, programmed in C (prototype in C++).

• stm32l4-project-plane

  (2018 - 2019) A. Colomar, F. J. García Pedroche, S. Junquera Carrero

  Project to demonstrate CAN communication to control an embedded system, programmed in C.

• PNP-Solver

  (2012 - 2019) A. Colomar

  Program that solves small NP-Complete problems, written in C.  Used to test the performance of the algorithm it implements.

• Praktikum UPV (Spanish): Control Automatico

  (2010) A. Colomar

  Program to control a helicopter-like system using a Wii remote.

  • Project overview

^ Education

• Courses

  :
  
  

  • man7.org Training and Consulting

    (2021 - 2022):

    • Michael Kerrisk

      :
      • [M7D-SECISOL02]: Linux Security and Isolation APIs
      • [M7D-LUSP01]: Linux/UNIX System Programming
      • [M7D-SHLIB02]: Building and Using Shared Libraries on Linux

  • Cognitive Class

    (2020):

    • IBM

      :
      • [PY0101EN]: Python 101 for Data Science

  • Coursera

    (2012 - 2013):

    • UPenn

      :
      • Single Variable Calculus

  • EdX

    (2012 - present):

    • AnahuacX

      :
      • [IEST-CP1-2x]: Introducción a la Inteligencia Artificial

    • Dartmouth_IMTx

      :
      • [DART.IMT.C]: C Programming with Linux

    • DelftX

      :
      • [AE1110x]: Introduction to Aeronautical Engineering

    • IITBombayX

      :
      • [ME209.1x]: Thermodynamics

    • LinuxFoundationX

      :
      • [LFS101x]: Introduction to Linux

    • Microsoft

      :
      • [DAT204x]: Introduction to R for Data Science

    • MITx

      :
      • [2.008x]: Fundamentals of Manufacturing Processes
      • [3.15.1x]: Electronic Materials and Devices
      • [3.15.2x]: Optical Materials and Devices
      • [3.15.3x]: Magnetic Materials and Devices
      • [3.032.1x]: Mechanical Behavior of Materials: Linear Elastic Behavior
      • [3.032.2x]: Mechanical Behavior of Materials: Stress Transformations, Beams, Columns, and Cellular Solids
      • [3.091x]: Introduction to Solid State Chemistry
      • [6.002.1x]: Circuits and Electronics 1: Basic Circuit Analysis
      • [6.002.2x]: Circuits and Electronics 2: Amplification, Speed, and Delay
      • [6.004.1x]: Computation Structures 1: Digital Circuits
      • [8.MReVx]: Mechanics ReView
      • [8.01.1x]: Mechanics: Kinematics and Dynamics
      • [8.01.2x]: Mechanics: Momentum and Energy
      • [8.01.3x]: Mechanics: Rotational Dynamics
      • [8.02x]: Physics II (Electricity and Magnetism)
      • [16.00x]: Introduction to Aerospace Engineering: Astronautics and Human Spaceflight

    • NYUx

      :
      • [CPP.PRG.1]: Introduction to Programming in C++
      • [CPP.PRG.2]: Advanced Programming in C++

    • TenarisUX

      :
      • [STEEL101x]: Introduction to Steel

    • UPValenciaX

      :
      • [DC201x]: Dynamics and Control

    • UQx

      :
      • [Hypers301x]: Hypersonics - from shock waves to scramjets

• Smart Manufacturing & Robotics Delft Minor

  - European Project Semester (2020)
  

  The Hague University of Applied Sciences (THUAS)

  , The Netherlands

• BEng Electronic & Computer Engineering

  - Erasmus Semester (2019)
  

  Institute of Technology Sligo (ITS)

  , Ireland

• BEng Industrial Electronics and Automation Engineering

  (2017 - 2020)
  

  Universitat Politècnica de València (UPV)

  , Spain
  • Minor: Industrial computing
  • High academic preformance group (Grupo ARA)
  • Special mention: Computer Vision
  • Special mention: Embedded Systems
  • Special mention: Industrial Computing I
  • Special mention: Digital Electronics
  • Special mention: Analog Electronics
  • Special mention: Electronic Technology

• BEng Industrial Organization Engineering

  (2014 - 2016)
  

  Universidad Politécnica de Cartagena (UPCT) / Centro Universitario de la Defensa (CUD)

  -

  Spanish Air Force

  , Spain
  • Special mention: Computer Science

• Technician in Telecommunication and Computer Systems

  (2013 - 2014)
  

  Academia Básica del Aire (ABA)

  -

  Spanish Air Force

  , Spain

• BEng Mechanical Engineering

  (2012 - 2013)
  

  Universidad Nacional de Educación a Distancia (UNED)

  , Spain

^ Languages

• Catalan: Native
• Spanish: Native
• English: Full professional proficiency