System Administrator / Site Reliability Engineer (f/m/d)

1&1 Mail & Media Applications SE | IT System Administration | Karlsruhe / Berlin / Munich | Permanent | Full-time | Experienced professionals | Reference ID: 4054

  • Tasks that ignite your passion

    Do you have a passion for the administration of complex and highly available infrastructures and applications? Do you want to make a real difference in a highly digital and agile environment with flat hierarchies? Then we are looking for you! We have more than just a job waiting for you: you can expect cutting-edge technologies such as Kubernetes or Kafka as well as the opportunity to use your skills and ideas to drive topics forward and develop yourself individually. As a System Administrator (f/m/d) you ensure that millions of customers can access their emails, news and cloud data via our websites and mobile apps.

    • You will ensure the smooth, reliable operation of our products, which are used millions of times a day, in our in-house data centers. You will also continue to develop our platforms in terms of stability and performance.
    • You will act as an interface between software development and the platform teams, working with them to make technology decisions and define service level objectives.
    • You develop infrastructure as code, e.g. as part of Gitlab CI/CD pipelines, Helm Charts or Docker container images.
    • You constantly improve our observability infrastructure to uncover potential sources of error using tracing and metrics and ensure the reliability of our products and the protection of our customer data through suitable tests, monitoring procedures and analysis tools.
    • You will work on your own projects as part of so-called "slack days" or try out new technologies on prototypes.

Advantages you enjoy

Lived corporate culture

Transparency, open communication and short decision-making processes

Wide range of further training

E-learning, seminars, conferences and mentoring

Renowned TEC-Campus

Conferences, lecture series, courses, open source projects, community meetings, user groups

Active health care

Sports and fitness classes, lectures, discounts at fitness and health centers, fresh fruit and drinks for free


Generous subsidy for job bike leasing and the job ticket

Flexible working models

Home office, mobile office, flexible working hours, trust-based working time arrangements

Financial benefits

Company pension scheme, discounts on our products and various leisure activities

Legendary events

Summer and winter parties, additional workshops and team events

  • Your qualifications which inspire us

    Have you completed a technical degree or comparable training? Are you motivated to become part of an agile team and drive topics forward? Are you confident in dealing with CI/CD and are you no stranger to automation? Are you eager to learn, interested in cutting-edge technologies and can quickly familiarize yourself with new topics? Are you a real team player and do you have a hands-on approach to work? Then we look forward to receiving your application.

    • You are experienced in handling Linux systems in large numbers (e.g. with Puppet or Ansible) or containers (e.g. Kubernetes). Tools such as Prometheus, Grafana, Jaeger Tracing and Elasticsearch help you to maintain an overview.
    • You have relevant experience with at least one programming language (e.g. Python, Ruby, Go or Java).
    • You are no stranger to HTTP, REST, TLS, Docker and Git.
    • You like to work with international and cross-functional teams.
    • Your motto is: "Making mistakes is part of life". You like to take on responsibility, are solution-oriented and think outside the box.

We are brand. With GMX, WEB.DE and and over 43 million active users, we are the leading email and communication platform in Germany, Austria and Switzerland.

We are future. Our services and apps simplify digital life from cloud storage to news and ID management.

You are at home. Your digital passion finds a professional home with us. Your strength makes us stronger, your expertise complements our ideas, your success becomes visible. Together we shape the digital future.

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

Apply now

We look forward to receiving your application, including your salary expectations and the reference number given above. Please use our online application form. If you have any questions about the position or the application process, please send us an email.

1&1 Mail & Media Applications SE
Recruiting & Candidate Management
Brauerstraße 48
D-76135 Karlsruhe

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