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Staff Reliability Engineer (f/m/d)

IONOS SE
IT Software Development
Berlin
Full-time
I-1227

About IONOS SE

At IONOS, we don't just manage servers – we shape the digital future for more than 6.2 million customers worldwide with our solutions. As Europe's leading hosting provider and a pioneer in independent cloud solutions, we are building next-generation infrastructure – from sovereign cloud architectures and high-performance GPU clusters to integrated AI automation tools. What drives us is digital sovereignty for Europe and real impact for small and medium-sized businesses (SMBs) as well as large enterprises. We work in agile teams, rely on transparent structures, and believe that excellence and innovation only emerge through true team spirit. Ready for your next step? Become part of IONOS and grow with us.

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United Internet Office Building

Tasks

Our Object Storage platform runs on Ceph, spans multiple data centers, and holds double-digit petabytes of customer data. It is growing fast. We are looking for a staff-level engineer who knows Ceph, Linux and the network underneath it well enough to keep it healthy as it scales.

We follow a "you build it, you run it" model. You will deploy, operate and improve the platform with the Network, SRE, Data Center and infrastructure support teams. A separate development team works on the product, and you will work closely with them.

Your tasks

  • Own the reliability, performance and capacity of our production Ceph clusters across locations
  • Solid understanding of server hardware (disks, controllers, NICs) and how it affects storage performance, so you can diagnose hardware-related issues remotely
  • Diagnose the hardest issues across the full stack, from disk and server through the Linux network stack to the Ceph service, and lead incident response and postmortems
  • Automate deployments, upgrades and routine operations (Ansible) so they need less manual work
  • Build monitoring and observability that catch problems before customers do
  • Plan capacity and growth with the Data Center and Network teams
  • Take part in the on-call rotation
  • Follow Ceph releases and the community, and bring useful practices back to the team

Your profile

  • 5+ years as an SRE, Linux or storage engineer, with proven experience running Ceph in production (the more petabytes the better; 20 PB+ clusters are ideal)
  • Strong knowledge of Linux and its network stack, plus good networking fundamentals
  • Solid understanding of server hardware (disks, controllers, NICs) and how it affects storage performance
  • Experience with object, block and file storage concepts
  • Automation experience, ideally Ansible, and scripting in Python or Bash (you don't need to be a software engineer)
  • Monitoring and observability experience (e.g., Prometheus, Grafana)
  • Calm, structured troubleshooting when things break, and clear communication in English (German is a plus)
  • Willingness to undergo extended security vetting (SÜ2)

Qualifications

  • 5 years+ experience as a Senior Linux Engineer or Site Reliability Engineer; Deep and broad understanding of Linux systems and networking.
  • Proficiency in Ceph storage architecture and administration.
  • Knowledge of Cloud Storage technologies (File, Object, Block)
  • Experience with automation tools (eg, Ansible), monitoring and observability
  • Familiarity with cloud platforms and containerization technologies (eg, docker).
  • Excellent problem-solving and troubleshooting skills, strong communication and collaboration abilities.

Benefits that make a difference

As an employer, United Internet offers interesting roles with exciting projects, personalized development opportunities and excellent career prospects.

Culture

Our working environment is characterized by flat hierarchies and short decision-making processes. We encourage a positive approach to learning from mistakes and open feedback!

Mobility

To support sustainable and flexible mobility, we provide our employees with attractive benefits packages. For example, through JobRad, you can lease your ideal bike on attractive terms. We also provide a financial subsidy for this offer. Alternatively, you can use public transport and benefit from a subsidy towards the Deutschlandticket.

Events

We celebrate our successes as a team: at United Internet, we throw legendary parties. And our varied workshops and team events foster a special sense of camaraderie.

Flexible Working

Many of our roles allow for remote working from home and flexible working hours.

Pension and health

Our employees benefit from attractive pension schemes. These include modern financial security options that support wealth accumulation. Our health and fitness programmes, covering topics such as ergonomics, exercise and nutrition, round off the package. The aim is to provide a working environment in which all colleagues can not only develop professionally but are also well-positioned for their personal future. 

Discounts

Our employees benefit from a wide range of discounts on our Group’s products and services, for example in the form of discounted broadband and mobile phone contracts. In addition, we offer exclusive price advantages for selected leisure and partner offers.

A wide range of training opportunities

Strengths are individual – and that is a good thing! Our wide range of development programmes offers excellent opportunities for personal and professional growth. From e-learnings to trainings, conferences and mentoring – we learn from, for and with one another to grow together.

Technology

To provide our employees with a productive and comfortable working environment, we rely on state-of-the-art technology. This includes high-performance hardware, ergonomic accessories and the latest software tools for efficient collaboration.

Our benefits in detail

  • Hybrid working model.
  • Flexible working hours through trust-based working hours.
  • At some locations a subsidized canteen and various free drinks.
  • Modern office space with very good 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 offers, such as sports and health courses.

Join our team

United Internet offers diverse opportunities for people who want to help shape the digital future. Those who want to contribute their strengths and grow in an innovative environment will find the right place with us.

apply online now

Two colleagues in the office
WORK UNITED.
 

Diversity enriches. Different cultures, nationalities, genders, ages, sexual orientations and religions as well as people with disabilities - we value diversity and encourage it. Because only teams that reflect all facets of society offer the best environment for creativity and make a company productive and distinctive. We value diversity and welcome all applications.

Contact

Questions?

IONOS SE
Recruiting Team IONOS

Hinterm Hauptbahnhof 3-5
D-76137 Karlsruhe
jobs@ionos.com

Please submit your application exclusively through our easy-to-use online application form. This allows us to ensure a transparent application process while maintaining full compliance with all applicable data protection regulations. Unfortunately, we are unable to accept applications submitted via email for the reasons outlined above.