Cristóbal Peñalver
Senior Software Engineer at Expenti
Granada, Andalusia, Spain
Summary
🤩
Rockstar🎓
Top SchoolCristóbal Peñalver is a Senior Software Engineer with a decade of experience building secure, reliable backend systems from Granada, Spain. He has deep hands-on experience in security-focused open-source work—contributing bug fixes and vulnerability mitigations to Wazuh, a widely used open-source XDR/SIEM platform—and has also improved and maintained its documentation and release notes. Cristóbal has progressed through engineering roles at Wazuh, Unit4, and product-focused teams before joining Expenti, demonstrating strengths in stability engineering, SELinux/socket hardening, and cross-platform event handling. Comfortable spanning developer and technical-writer disciplines, he combines pragmatic troubleshooting with clear documentation to keep complex systems both robust and understandable. Colleagues describe him as a practical problem-solver who quietly improves tooling and processes that reduce operational friction.
10 years of coding experience
8 years of employment as a software developer
Computer Engineering, Computer Engineering at Universidad de Granada
Github Skills (14)
it-security10
compliance10
c-programming10
vulnerability-detection10
documentation10
security10
scripting9
linux9
incident-response9
shell9
script9
sh9
windows8
sia8
Programming languages (5)
Github contributions (5)
wazuh/wazuh
Jun 2018 - Dec 2019
Wazuh - The Open Source Security Platform. Unified XDR and SIEM protection for endpoints and cloud workloads.
Role in this project:
Backend & Security Engineer
Backend & Security EngineerContributions:172 commits, 70 PRs, 256 pushes in 1 year 5 months
Contributions summary:Cristóbal's commits primarily focused on enhancing the Wazuh security platform's core functionalities. These include fixing active response repeaters, addressing vulnerabilities in the SELinux socket creation process on CentOS and Fedora, and correcting issues related to Windows event logging. Furthermore, the user contributed to improving the stability of the agent by addressing bad file descriptor errors. These changes encompass both bug fixes and general improvements to the platform.
malware-detectionendpointscompliancecloud-securitysecurity-hardening
wazuh/wazuh-documentation
Jul 2018 - Nov 2019
Wazuh - Project documentation
Role in this project:Technical Writer
Technical WriterContributions:24 commits, 17 PRs, 46 pushes in 1 year 4 months
Contributions summary:Cristóbal primarily contributed to the project by enhancing and adding to the Wazuh documentation. Their work includes improving vulnerability detection documentation by updating the compatibility matrix and the use case section, removing obsolete documentation, and updating the architecture.rst file. Furthermore, the user incorporated release notes for Wazuh versions 3.5.0, 3.6.0, 3.7.0, and 3.8.0, including the addition of documentation for multi-groups and policy monitoring modules and configuration assessment, demonstrating a focus on keeping the documentation current with the software's new features and changes.
loganalyzerreferenceintrusion-detectionosseccompliance
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