System Administrator (f/m/d) Defense Products

IONOS; Karlsruhe; Vor Ort; EUR 65.000 - 90.000; Vollzeit

Benefits dieser Stelle

Subsidized canteen

Free drinks

Public transport access

Employee discounts

Training and development

Zusammenfassung

IONOS in Karlsruhe is seeking a System Administrator to plan and operate defense platforms alongside site reliability and network engineers. You will manage highly available Linux infrastructures, deploy Nginx as reverse proxy and WAF, and contribute to modern DDoS protection and CDN efforts.

The role emphasizes automation with Ansible, Puppet, and Python, on-call rotations, and international deployments. You will evaluate new technologies, participate in CI/CD pipelines, and help drive agile

Qualifikationen

• Several years of experience administering complex distributed Linux systems.
• Experience configuring and operating Nginx as reverse proxy or WAF.
• Hands-on deployment of BGP, Flowspec, and Anycast on Linux and routers.
• Automation experience with Ansible, Puppet and Python.
• Strong analytical skills to evaluate DDoS attacks and defenses.
• Familiarity with Docker, Kubernetes, ClickHouse, or ELK Stack is a plus.
• Open Source advocate with a Linux focus.
• Flexible working hours through trust-based hours.
• Subsidized canteen and free drinks at select locations.
• Modern office with good public transport connections.
• Employee discounts and events; training opportunities.

Aufgaben

• Administration and troubleshooting of highly available infrastructures, including on-call rotation.
• Develop and optimize distributed DDoS defense platforms and visualization mechanisms.
• Monitor systems, analyze security attacks, and track industry trends.
• Evaluate and assess new technologies and products.
• Develop and implement new functions; plan and operate international setups.
• Support company goals through efficient operating architecture in an agile DevOps environment.
• Conception, setup, and evolution of CI/CD pipelines and related processes.

Kenntnisse

Linux system administration

Automation scripting

English communication

Network security concepts

Ausbildung

Degree in Computer Science

Tools

Nginx

Docker

Kubernetes

ClickHouse

ELK Stack

Ansible

Puppet

Python

BGP/Flowspec/Anycast

Jobbeschreibung

Join our highly motivated team of experts dedicated to combating cybersecurity threats. As a System Administrator, you will plan and operate our cutting-edge defense platforms alongside site reliability engineers and network engineers. These platforms are crucial for protecting our hosting products and infrastructure, encompassing classic DDoS mitigation, modern Web Application Firewalls (WAF), Zero Trust strategies, and our Content Delivery Network (CDN). We foster a culture that highly values creative ideas, agile working methods, initiative, and participation.

Tasks

• Administration and troubleshooting of highly available and complex infrastructures, including participation in an on-call service rotation.
• Further development and optimization of distributed DDoS defense platforms, as well as analysis and visualization mechanisms.
• Monitoring of systems, analysis of security attacks, and active tracking of current industry trends.
• Evaluation and assessment of new technologies and products.
• Development and implementation of new functions, as well as planning and operating international setups.
• Supporting company goals through efficient operating architecture, active lifecycle management, and lean processes in an agile DevOps environment.
• Conception, setup, and further development of CI/CD pipelines and supporting technical processes.

Qualifications

You have completed a degree in Computer Science or a comparable professional education. Additionally, you have a keen interest in security topics, strong networking knowledge, fluent English communication skills (German is a plus), and the following qualifications:

• Several years of experience in the administration of complex, distributed Linux systems.
• Proven experience in configuring and operating Nginx as a reverse proxy or web application firewall.
• Hands-on experience with the deployment of BGP, Flowspec, and Anycast routing on Linux systems and network routers.
• Strong passion for automation using tools like Ansible, Puppet, and Python to eliminate repetitive manual tasks.
• Strong analytical skills to evaluate DDoS attacks, implement effective countermeasures, and continuously develop our defense platforms.
• Initial experience with technologies such as Docker, Kubernetes, ClickHouse, or the ELK Stack is beneficial.
• Like us, you are a strong advocate for Open Source, especially Linux.
• Flexible working hours through trust-based working hours.
• Subsidized canteen and various free drinks at select locations.
• Modern office space with excellent public transport connections.
• Various employee discounts for activities and products.
• Employee events such as summer and winter parties, as well as workshops.
• Numerous training and development opportunities.
• Various health offerings, such as sports and wellness courses.