Junior Linux Systemadministrator (m/w/d)

About the Position

Heinlein Support is the specialist for E-Mail-Server and Linux in the data center. Our knowledge and experience are shared at the Heinlein Academy, through personal consulting, individual hosting, and our E-Mail-Provider mailbox. Our clients include universities, authorities, companies of all sizes, providers, and international carriers.

In the Heinlein Hosting business area, we operate highly available, individual server infrastructure for mailbox, our business customers, and international NGOs using our own technology in two Berlin data centers. We consider ourselves a Solution Hoster and do not engage in mass business.

Do you feel at home on the Linux command line, are passionate about Open Source, and want to deepen your knowledge in practice? Whether after your IT education or with experience from your own projects: With us, you can work your way into sophisticated technologies and gradually take on more responsibility. We are interested in your previous experiences and projects and what excites you about Linux and Open Source.

As a Junior Linux Systemadministrator (m/w/d) in full-time or part-time, you will be part of our hosting team. Together with experienced colleagues, you will maintain our infrastructure from everyday tasks in system operation to automation, container platforms, and highly available databases. The position is based in Berlin. Our hybrid working model offers you a flexible division between mobile work and exchange in the office.

Responsibilities

• You keep our systems running: You work with our team on the administration and monitoring of our Linux infrastructure. You take on everyday tasks in system operation and get to the bottom of technical problems.
• You automate what can be automated: You create and maintain scripts and Ansible playbooks. With OpenTofu or Terraform, you manage our infrastructure using code-based tools.
• You ensure reliable deployments with us: You maintain and optimize our CI/CD pipelines, for example in GitLab, and develop our processes further according to the GitOps principle.
• You develop our container platforms with us: Together with the team, you build and operate Kubernetes and OpenShift clusters and monitor their condition. You deploy containerized applications and analyze errors at the pod and node level.
• You work on secure system access: You install, configure, and administer Keycloak and connected directory services. You connect applications via OIDC, OAuth2, and SAML, maintain identity and access policies, and get to the bottom of login and rights assignment issues.
• You help keep our data available: You assist in setting up and operating highly available database clusters and in setting up and monitoring their replication between data centers. This includes performance analysis, backup and restore tests, and failover scenario tests.
• You take on responsibility: You participate in paid on-call availability and help ensure the availability of our systems outside of regular working hours.

Requirements

• You bring a suitable background: You have completed an IT education, such as a degree in System Integration, or a computer science degree.
• You are familiar with Linux: You are very comfortable on the command line, especially with SUSE and Debian, and know the basics of permissions and networks.
• You have gained initial practical experience: Containers with Docker or Podman are familiar to you. You have already worked with Bash or Python and Git.
• You understand the technical basics: You have basic knowledge of Kubernetes or OpenShift, Infrastructure as Code, and relational databases. The basic ideas of database replication and tools like Ansible or OpenTofu are known to you.
• You have dealt with authentication: You understand the basics of Single Sign-on, OAuth2, and tokens and have initial experience with tools like Keycloak.
• You want to learn and think along: You like to work your way into new technologies, systematically investigate errors, and keep security and reliability in mind.
• You contribute to the team: You communicate clearly, ask questions, and actively seek feedback. You speak fluent German and have good English skills.

We Offer

Work with Purpose

Our DNA and passion: Linux, Open Source, and data protection. Let's make our customers' communication freer, safer, and thus digitally sovereign together.

Knowledge

Expect challenging and varied tasks that always bring new insights. Knowledge exchange and knowledge transfer across all teams and levels are a matter of course for us.

Growth

We specifically promote your professional and personal development. Open exchange in the team is just as essential as internal and external training, conferences, or coaches.

Work-Life Balance

We make it possible for you to reconcile work and family - for example, through flexibility and partial remote work. Oh yes: Overtime is not a matter of course and will of course be compensated.

Family Business

We are a family-run company with over 25 years of history. For our culture, this means a trusting mutual relationship, stability, and security. We are happy to involve you in our joint company success.

Amenities

Coffee, tea, and fruit are always available. As well as regular joint team events and activities that make (work) life more beautiful.

How We Come Together

Application

We look forward to your application by email including possible start date and your salary expectation. Please give us some time to review it.

Introductory Call

We invite you to a 20-minute introductory call by phone.

Job Interview

We meet for a detailed interview - online or at our location in Berlin. You usually get to know 3 people from our team here.

Decision

We will definitely get back to you and provide feedback.

Onboarding

We look forward to the first joint working day.

Any Questions?

Susanne Baldin Head of People & Culture

+49 30 40 50 51 - 79 [email protected]

Our data protection notes for your application.