Site Reliability Engineer (w/m/d)

Role overview

You will work as a Site Reliability Engineer (SRE) in the Application Hosting team, forming the technical backbone of IONOS’s product platform for Managed Nextcloud, Nextcloud Workspace, IONOS GPT, and other web services running on a Kubernetes platform.

Responsibilities

• Evolve the infrastructure/platform for the products and integrate new products/web services into the Kubernetes and cloud infrastructure
• Ensure stable and secure operation of the product platform
• Perform deep analysis and optimize primarily containerized, Kubernetes-based application infrastructure
• Drive automation and manage infrastructure declaratively and reproducibly
  • Use Terraform, GitLab CI/CD, and Argo CD to provision and manage infrastructure
• Analyze and resolve complex distributed-system issues and continuously improve the platform
• Build and maintain Monitoring/Logging/Alerting for proactive detection of bottlenecks and failures (e.g., Prometheus, Grafana, ELK stack)

Requirements

• Multi-year experience as an SRE or in a related role (Linux System Administrator, Platform Engineer, DevOps Engineer, Full Stack Developer) in Linux and Kubernetes environments
• Strong, long-term hands-on experience with Linux, container technologies, and Kubernetes
• Experience with Infrastructure as Code (preferably Terraform)
• Experience with CI/CD pipelines (e.g., GitLab CI/CD or GitHub Actions)
• Experience using Helm charts
• Proficiency in at least one programming/scripting language for automation and monitoring tasks (e.g., Go, Python, Bash), and ideally some experience building operators
• Experience operating and troubleshooting high-availability, distributed production systems, including monitoring, alerting, and log analysis
  • Examples: Prometheus, Grafana, FluentD, ELK, VictoriaMetrics, icinga
• Proactive, solution-oriented and independent work style; ability to systematically analyze complex technical problems
• German and English communication skills

Benefits / work model

• Hybrid work model and flexible hours (trust-based working time)
• Additional perks such as subsidized canteen (at some sites), modern office locations, employee discounts, events, workshops, training, and health offerings