Mission of the role

You will be part of the team responsible for operating one of the largest and most complex hosting platforms in Europe.

Your mission will be to ensure the stability, performance, and evolution of the Stretch platform, working directly on critical production systems and contributing to the continuous improvement of a highly distributed infrastructure.

This is a strongly technical role with hands-on impact at scale, where your work will directly influence service quality and platform evolution.

You will collaborate closely with Hosting Technology teams and other web hosting teams within IONOS, with frequent interaction with international colleagues—particularly in Germany—to consolidate knowledge of existing systems.

 Responsibilities

• Operation, maintenance, and evolution of large-scale Linux infrastructure.
• Advanced (Level 3) support for complex platform incidents.
• Automation of processes using scripting (BASH, Python) and infrastructure tools.
• Operation and management of distributed storage systems (Ceph).
• Monitoring and analysis of the platform using observability tools (Grafana and similar).
• Continuous improvement of system architecture and stability.
• Collaboration with international teams to absorb knowledge from legacy systems.
• Participation in on-call rotation.

 Professional profile

Must have

• +3 years of experience in Linux system administration.
• Strong scripting skills in BASH and Python.
• Experience with configuration and automation tools:
  • Puppet or SaltStack
  • Ansible or Terraform
• Hands-on experience operating Ceph storage clusters in production environments.
• Experience with monitoring and observability tools such as Grafana.
• Fluent English, required for international communication.

Nice to have

• Knowledge of SQL databases (MySQL, PostgreSQL).
• Solid understanding of networking fundamentals.
• Experience with container technologies (Docker/Kubernetes).
• Knowledge of CI/CD pipelines.
• Experience in highly distributed or high-availability environments.

Soft skills

• Technical curiosity and continuous learning mindset.
• Ability to work in complex environments with incomplete documentation.
• Pragmatic approach to problem solving.
• Team player in international environments.
• Proactive attitude to independently build technical context.
• Participation in an on-call rotation (approx. 1 week every 6).

 Benefits

• Hybrid working model across any of the Arsys offices in Logroño, Alcobendas, Valencia, Barcelona, or Seville, with broad flexible working hours aligned with team coordination needs.
• Opportunity to work on one of the most advanced and large-scale hosting platforms in Europe.
• Direct exposure to highly complex distributed systems at significant scale.
• International technical environment with cross-country collaboration.
• Participation in critical projects with direct impact on service stability.
• Continuous training and professional development within a global technology organization.

At Arsys we value diversity and welcome all applications regardless of, for example, gender, nationality, ethnic or social origin, religion, disability, age, as well as sexual orientation and identity, physical characteristics, marital status or any other irrelevant factor subject to applicable law.

Are you a Linux expert who loves solving challenging problems and automating complex systems? Do you want to work in a dynamic, international team where your technical skills make a real impact? Join IONOS and help us power cloud and hosting services for thousands of customers worldwide!

About the Role

As a Senior Linux System Administrator in our Managed Service Platform Operations (MSPO) team, you will manage, automate, and optimize our server platforms (bare metal and virtualized), ensuring high-quality service delivery for cloud and hosting services. You’ll work hands-on, troubleshoot complex issues, and continuously improve our platforms through automation and best practices.

Tasks

• Ensure smooth daily operations of managed service platforms.
• Administer Linux servers globally.
• On-call support as a 3rd-level agent for customer tickets (max one week per month).
• Automate recurring tasks using Bash, Perl, Python, and Ansible.
• Troubleshoot Linux systems, Apache servers, and MySQL databases.
• Collaborate with team members, stakeholders, and customers.
• Maintain documentation and follow best practices.

Requirements

• Advanced Linux system administration skills.
• Experience in Bash, Perl, or Python scripting.
• Troubleshooting experience with Linux, Apache, and MySQL.
• Experience with Ansible automation.
• Familiarity with ticketing and collaboration tools (OTRS, Jira, Confluence).
• Strong problem-solving skills, proactive mindset, attention to detail.
• Excellent communication skills and customer-oriented attitude.

Benefits

• Hybrid work in Valencia.
• Flexible working hours.
• Flexible compensation packages.
• Discounts on Arsys products.
• Discounts on technology brands.
• Personalized training and development.
• Biannual team events.

We are looking for a Head of Infrastructure to own the strategy and execution of our hybrid infrastructure. This role is perfect for a leader who understands the "full stack" of infrastructure—from physical data centers to managed cloud services—and can bridge the gap between technical complexity and business goals.

You will lead a team of specialists, ensuring our Linux-based ecosystem and Kubernetes clusters (on-prem and cloud) are reliable, scalable, and fully automated.

Key Responsibilities

• Infrastructure Strategy: Develop the vision for a hybrid environment that balances the performance of on-prem bare metal with the agility of the public cloud.
• Architectural Oversight: Guide the design of robust, scalable solutions. You aren't the one clicking the buttons, but you are the one ensuring the architecture is sound.
• Team Leadership: Build and manage a high-performing team of DevOps and SRE engineers. Foster a culture of accountability and continuous learning.
• Automation Evangelism: Drive the transition toward "No-Ops" by prioritizing automation across all layers of the infrastructure stack.
• Vendor & Capacity Management: Manage the lifecycle of hardware and data center relationships. Balance OpEx (Cloud) and CapEx (On-Prem) effectively.
• Security & Compliance: Ensure that the infrastructure meets modern security standards, from network isolation to access management.

Technical Profile (Strong Conceptual Understanding)

• Linux Foundations: A solid understanding of Linux internals, file systems, and server management principles.
• Networking Principles: Strong grasp of L2/L3 networking, routing, BGP, and load balancing, especially in the context of connecting data centers to the cloud.
• Kubernetes Ecosystem: Good understanding of K8s architecture, including how it runs on bare metal versus managed services (EKS/GKE). You should understand orchestration, persistent storage, and service discovery.
• Cloud Platforms: Experience managing environments in AWS, GCP, or Azure.
• Modern Tooling: Familiarity with the CNCF landscape, CI/CD pipelines, and Infrastructure as Code (Terraform, Ansible).

Core Competencies

• Management Excellence: Proven track record of leading technical teams and managing stakeholders.
• High Responsibility: A "the buck stops here" attitude regarding system reliability and team performance.
• Strategic Thinking: The ability to decide when to build on-prem (for cost/performance) and when to use cloud (for speed/flexibility).
• Process Driven: A focus on documentation, post-mortems, and standardized workflows.