Site Reliability Engineer (f/m/d)

IONOS; Karlsruhe; Hybrid; EUR 75,000 - 110,000; Full time

Benefits offered by this job

Hybrid work model

Flexible hours

Cafeteria subsidy

Modern office

Job summary

IONOS in Karlsruhe seeks an experienced Site Reliability Engineer to strengthen the Kubernetes-based product platform, including Managed Nextcloud. You will design services with colleagues to keep them performant and resilient under high load.

You automate with Terraform, GitLab CI/CD and ArgoCD, operate containerized stacks, and build monitoring pipelines with Prometheus, Grafana and ELK. Strong Linux/Kubernetes expertise, IaC/CI/CD experience, and fluent German and English are essential in

Qualifications

• Several years of experience as an SRE or in related roles in Linux/Kubernetes.
• Experience with Infrastructure as Code (Terraform), CI/CD pipelines and Helm charts.
• Proficient in at least one programming/scripting language (Go, Python, Bash) for automation.
• Experience with monitoring, logging and alerting in distributed production environments.

Responsibilities

• Develop and operate infrastructure and Kubernetes-based platforms.
• Ensure stable and secure operation of the product platform.
• Automate with Terraform, GitLab CI/CD and ArgoCD.
• Analyze and resolve complex issues in distributed systems and improve the platform.
• Develop and maintain monitoring/alerting with Prometheus, Grafana and ELK.

Skills

Linux

Kubernetes

Automation

Monitoring

German & English

Tools

Terraform

GitLab CI/CD

ArgoCD

Helm

Job description

About IONOS

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.

As a Site Reliability Engineer (SRE) in our Application Hosting Team, you form the technical backbone of our product platform for Managed Nextcloud, Nextcloud Workspace, IONOS GPT, as well as other web services that we operate on our Kubernetes platform. Together with experienced colleagues, you design new services and products that remain performant and resilient even under the highest load.

Tasks

• Your main area of focus is the further development of the infrastructure/platform for our products, as well as the integration of new products/web services into our Kubernetes and Cloud infrastructure.
• You are responsible for the stable and secure operation of our product platform. Your expertise is in demand when it comes to in-depth analysis and optimization of our primarily containerized and Kubernetes-based application infrastructure.
• You live automation. Using tools like Terraform, GitLab CI/CD, and ArgoCD, you provision and manage our entire infrastructure declaratively and reproducibly.
• You analyze and resolve complex issues in a distributed system landscape and work on the continuous improvement of our platform.
• You develop and maintain our monitoring, logging, and alerting solutions (e.g., using Prometheus, Grafana, ELK stack) to proactively identify bottlenecks and sources of error.

Qualifications

• You have several years of experience as a Site Reliability Engineer or in a related role (Linux System Administrator, Platform Engineer, DevOps Engineer, Full Stack Developer) in a Linux and Kubernetes environment.
• Strong knowledge and several years of experience using the Linux operating system, container technologies, and specifically Kubernetes.
• You have experience with Infrastructure as Code (preferably Terraform), CI/CD pipelines (e.g., GitLab CI/CD or GitHub Actions), and using Helm Charts.
• You can confidently develop in at least one programming or scripting language (e.g., Go, Python, Bash) to solve automation and monitoring tasks, and you may already have initial experience building Operators.
• Experience operating and troubleshooting highly available and distributed production environments, including monitoring, alerting, and log analysis of distributed applications (e.g., Prometheus, Grafana, FluentD, ELK, VictoriaMetrics, Icinga).
• You have a proactive, solution-oriented, independent way of working, and the ability to systematically analyze and sustainably solve complex technical problems.
• Good German and English language skills are required.

Benefits

• 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.

Application Note

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.