CloudLinux is a integral remote-first company. We are driven by our principles: do the right thing, employees first, we are remote first, and we deliver high-volume, low-cost Linux infrastructure and security products that help companies to increase the efficiency of their operations. Every person on our team supports each other and does what we can to ensure we all are successful.

Check out our website for more information: cloudlinux.com

We are currently hiring a Staff Security Engineer within the Imunify360 product.

Imunify360 is CloudLinux's security suite for Linux web servers. It protects hundreds of thousands of hosting servers and the websites running on them, so it sees most large-scale web attacks early — often in the first hours.

Check out our website for more information: https://imunify360.com/

Role Mission & Scope

At Imunify360, protecting customers from evolving cyber threats requires close collaboration between security research, engineering, and other teams.



Responding to complex attack campaigns involves more than identifying threats — it requires understanding attack techniques, developing effective detection and mitigation strategies, and ensuring customers are protected.

As a Staff Security Engineer, you'll take end-to-end technical ownership of complex security challenges, from initial threat discovery and analysis to detection, mitigation, and post-incident review.

This is a hands-on technical leadership role focused on practical security engineering rather than SOC monitoring, compliance, or purely theoretical research. You'll analyze malware and exploit code, develop detection and mitigation tools, anticipate emerging attack techniques, and ensure security findings translate into production-ready detections, mitigations, and fixes.

You'll work closely with engineering, security research, support, external partners, and the broader security community to coordinate responses and drive continuous improvements in our security capabilities

📌 Staff Security Engineer, Imunify360 (Madrid)
🏢 CloudLinux
📍 Madrid