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Christopher Coss Mejia

Systems Administrator & Backend Developer

Systems Backend Infrastructure Open Source

Systems and software professional from Mexico with more than 6 years of experience across backend development, Linux and Windows Server environments, networking, virtualization, cybersecurity and web infrastructure.

Location
Mexico City, Mexico
Languages
Spanish — Native
English — C1 Certified
Website
zibuu.net

About me

I'm Christopher, also known online as Kissadevre.

My work sits somewhere between software development and infrastructure. I enjoy building backend applications, but I also like understanding everything behind them: the servers they run on, how services communicate, how users authenticate, how data is stored, how systems are secured and what happens when something breaks.

My main development stack is PHP, Laravel and MariaDB/MySQL. On the infrastructure side, I regularly work with Linux, Windows Server, Proxmox, Docker, Active Directory, DNS, VPNs, monitoring and self-hosted services.

I'm also the founder of Zibuu , where I combine software, infrastructure, open source and a more colorful side of technology.

How I build software

I prefer solving real problems over accumulating features.

  • Build around real needs.
  • Keep systems understandable and maintainable.
  • Treat security as part of the architecture.
  • Avoid complexity without a clear reason.
  • Open source what can help others learn and build.

Professional Experience

Selected technical experience
Envases Xena · Mexico City

Senior Software Developer

Jun 2026 — Present
  • Develop and maintain internal web systems, backend services, APIs and business integrations using PHP and Laravel.
  • Design maintainable solutions around operational needs, authentication, data flows and automation.

System Administrator

Nov 2025 — Jun 2026
  • Administered Linux and Windows Server environments, Active Directory, DNS, VPNs, virtualization, backups and monitoring.
  • Supported infrastructure reliability, troubleshooting, security controls, endpoint management and technical documentation.
PriceShoes

System Analyst

May 2024 — Jan 2025
Mexico City

  • Diagnosed and resolved system, software and endpoint incidents supporting day-to-day IT operations.
  • Worked with users and infrastructure teams to maintain reliable access to business systems and services.
TNAHosting

Server Administrator

Jun 2020 — Nov 2023
Remote

  • Administered Linux hosting environments, web servers, DNS, mail services, backups and remote access.
  • Performed troubleshooting, service monitoring, maintenance, security hardening and recovery tasks.
Zibuu · Freelance

Full-Stack Web Developer

Aug 2018 — Present

  • Build web applications, APIs, integrations and open-source projects using PHP/Laravel, MariaDB/MySQL, Git, HTML, CSS and Bootstrap.
  • Combine application development with deployment, Linux infrastructure and self-hosted services.

Technical Skills

Backend Development

PHP Laravel REST APIs MVC Postman Git HTML CSS Bootstrap

Systems & Infrastructure

Linux Ubuntu Debian Windows Server Proxmox VE KVM Docker Nginx Apache

Networking & Security

Active Directory DNS LAN/WAN VPN UFW iptables pfSense Wireshark Nmap Wazuh Fail2ban

Data, Automation & Identity

MariaDB MySQL Bash Python LDAP SSO Keycloak
Currently expanding my knowledge of PostgreSQL, Redis and Rust.

Education

Computer Systems Engineering

UVEG · Online · In progress

Technical Diploma in Business Information Technology

Centro Educativo ICEI · Morelos · 2025–2026

Bachelor's Degree in Forensic Sciences

Escuela de Derecho Posgrados y Práctica Jurídica · 2021–2023

Bachelor's Degree in Law

Escuela de Derecho Posgrados y Práctica Jurídica · 2018–2021

Certifications

Introduction to Cybersecurity
Cisco Networking Academy · March 2024
Cybersecurity Fundamentals
IBM SkillsBuild · February 2024
Web Design & Computational Thinking
PILARES · August 2024

Additional Experience

Additional professional experience outside my primary systems and software roles.

Interpreter & Translator
LanguageLine Solutions
Feb 2025 — Jun 2025
Airline Incident Coordinator
Passenger Handling Services
Dec 2023 — May 2024
Software Localization Specialist
Azuriom
May 2023 — Sep 2023
Forensic Services Intern
FGE Morelos
Apr 2022 — Aug 2022
Junior Web Developer
FusionD3
Sep 2017 — Feb 2018

Open source matters to me.

Much of what I know today came from open-source software and the people who shared their knowledge publicly. Whenever possible, I try to return part of that by publishing projects that others can use, study, modify or self-host.