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.

❗️Please note that this role is office-based for Spain.

❗️If you need to be relocated, we take care of the process.

✅ We offer excellent benefits, including but not limited to:

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 Platform Data Engineer to join our Spanish hub in Belgrade and work on real-time analytics and streaming solutions. You’ll design scalable data architectures, optimize pipelines, and drive best practices across teams.

✅ Responsibilities:

• Advise business streams on data platform architecture: when and how to use ClickHouse, explain data flow architecture;
• Review code and solutions from business teams, ensure best practices and scalability;
• Design and build platform data architecture: tables, materialized views, and views in ClickHouse;
• Configure and maintain Debezium and MSK Kafka connectors;
• Build and optimize data pipelines and database performance;
• Lead and drive initiatives to improve data platform standards and adoption.

✅ Requirements:

• 5+ years of hands-on experience working with data;
• Strong expertise in ClickHouse (schema design, queries, performance optimization);
• Good knowledge of relational databases (e.g., MySQL), ability to analyze and reverse-engineer schemas and code;
• Experience with streaming tools (Kafka, Debezium, connectors);
• Ability to review code and guide teams in architectural decisions;
• Strong problem-solving and communication skills;
• Experience driving initiatives across teams.

✅ Why you should join us?

We offer Excellent benefits, including but not limited to:
🧑🏻‍💻 Learning and development opportunities and interesting challenging tasks; 
✈️ Relocation package (tickets, staying in a hotel for 2 weeks); 
📚 Opportunity to develop language skills, with partial compensation for the cost of Spanish classes (for localisation purposes). 
🏥 Global coverage health insurance. 
🏝 Time for proper rest, with 23 working days of annual vacation and an additional 6 paid sick days. 
📈 Competitive remuneration level with annual review. 
🤝 Teambuilding activities