Linux System Administrator (f/m/d) - Defense Products

Location: Hybrid work in Karlsruhe and/or Berlin, Germany

Company

hirify.global is a European provider of cloud infrastructure, cloud services, hosting, and digitalization solutions for small and medium-sized businesses and enterprise customers.

What you will do

• Operate and troubleshoot scrubbing platforms and large-scale proxy infrastructure for real-time DDoS mitigation.
• Manage the lifecycle of more than 800 Linux-based components in a highly available defense infrastructure.
• Participate in a mandatory one-week-per-month on-call rotation supporting 24/7 protection against high-priority network threats.
• Use the ELK Stack and ClickHouse to analyze high-volume telemetry, identify attack signatures, and develop mitigation strategies.
• Develop and optimize CI/CD pipelines in an agile DevOps environment.
• Evaluate and integrate technologies such as Docker and Kubernetes for defense platforms.

Requirements

• 3–5 years of platform operating experience at scale and several years administering complex, distributed Linux systems.
• Expert-level Linux administration skills in complex, distributed environments.
• Experience configuring and operating Nginx as a reverse proxy or Web Application Firewall.
• Hands-on experience with BGP, Flowspec, and Anycast routing on Linux systems and network routers.
• Strong automation skills with Ansible, Puppet, and Python.
• Strong analytical skills and a proactive interest in DDoS mitigation, cybersecurity defense, and Open Source technologies.

Nice to have

• Initial experience with Docker, Kubernetes, ClickHouse, or the ELK Stack.

Culture & Benefits

• Hybrid working model with flexible trust-based working hours.
• Open structures, flat hierarchies, agile working methods, and strong team collaboration.
• Training and development opportunities.
• Subsidized canteen, free drinks at select locations, employee discounts, and health and wellness offerings.
• Modern offices with public transport connections and regular employee events.