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Junior Linux System Engineer (f/m/d) - IT-Infrastructure Services

Ionos2

Karlsruhe (IONOS SE) Remote permanent

Posted: February 12, 2026

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Quick Summary

We are looking for an experienced system engineer with Linux expertise to operate the global Linux-based infrastructure.

Job Description

At IONOS, the leading European provider of cloud infrastructure, cloud services and hosting services, you will work together with a wide range of teams. We are characterized by open structures, a friendly working culture and flat hierarchies with a strong team spirit. We firmly believe that work and fun are compatible, and offer you the right environment for this. Our constant growth means that we are always looking for new colleagues. Become part of IONOS and grow with us.

Tasks

We are looking for an experienced system engineer with Linux expertise to operate the global Linux-based infrastructure services at IONOS. You will be given responsibility and creative freedom to work with a skilled team to ensure the smooth operation of our extensive global platform and drive its further development.

• You can expect a dynamic environment that is open to technical innovation and creative solutions.

• You will be responsible for our various IT infrastructure services (such as web servers, Haproxy, Puppet, Grafana, Prometheus, Git, PKI/CA, HSM, Vault, and the internal virtualisation platform) on several hundred systems in multiple data centres worldwide, ensuring their high availability.

• You will analyse problems, eliminate malfunctions within the framework of the respective ITIL processes and document them.

• You will carry out performance analyses and optimisations and evaluate new technologies.

• In addition, you will participate in a rotating 2nd level on-call service for the team's own services together with the team.

Qualifications

It is not a disadvantage if you cannot do or know everything listed here. It is more important to us that you have a solid knowledge of Linux systems and an interest in system administration, that you are motivated and eager to learn, and that you want to share and expand your knowledge with others.

Furthermore, you have:

• We require several years of professional experience and in-depth knowledge of Linux server system administration.

• This includes knowledge of SSH, shell and remote server administration. Ideally, you will already have experience in the administration of large Linux environments and knowledge of the challenges involved.

• Know-how in a programming language (such as Python, Ruby, Golang or similar), as well as in automation and orchestration tools (e.g. Puppet) round off your profile.

• Experience in setting up and operating Ceph clusters would be an asset to the team.

• Monitoring, troubleshooting and documentation are familiar concepts to you.

• You have a structured and independent way of working, which you have acquired during your studies or equivalent professional experience.

• Good English skills, the ability to work in a team, and a communicative and open-minded attitude towards our internal and international partners are also a given for you.

Benefits

• Hybrid working model with home office option.

• 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.

• Location: Berlin, Karlsruhe to remotely within Germany.

About IONOS

IONOS is the leading European digitalization partner for small and medium-sized businesses (SMB). The company serves around six million customers and operates across 18 markets in Europe and North America, with its services being accessible worldwide. With its Web Presence & Productivity portfolio, IONOS acts as a 'one-stop shop' for all digitalization needs: from domains and web hosting to classic website builders and do-it-yourself solutions, from e-commerce to online marketing tools. In addition, the company offers Cloud Solutions to enterprises who are looking to move to the cloud as their businesses evolve.

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.

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