Senior ICT System Engineer (m/f/d)

As an experienced ICT System Engineer, you are an essential part of our team. You plan, implement, and optimize modern ICT platforms and ensure their secure, stable, and high-performance operation. With your technical know-how, your view of the overall system, and your solution-oriented way of working, you develop sustainable infrastructure solutions for our customers.

• You design, implement, and operate complex system and platform architectures in on-premises, cloud, and hybrid environments.
• You automate provisioning, configuration, and operation of infrastructure with Infrastructure-as-Code and configuration management tools such as Terraform, Ansible, or PowerShell.
• You develop scripts, tools, and automations to standardize deployments, operational processes, and recurring engineering tasks.
• You design and implement CI/CD pipelines for infrastructure, platform, and application components.
• You operate and optimize virtualized and containerized environments, for example with VMware, Hyper-V, Docker, and Kubernetes.
• You integrate server, network, storage, identity, and security components into stable and scalable overall systems.
• You design technical solutions for network segmentation, DNS, load balancing, reverse proxies, firewalls, VPN, and secure system communication.
• You implement monitoring, logging, and observability solutions and use metrics, logs, and traces to analyze complex system states.
• You analyze performance problems, network errors, resource bottlenecks, and complex incidents down to the operating system, network, or application level.
• You plan and implement migrations, platform upgrades, system replacements, and cloud transformations.
• You develop technical standards and reference architectures for reusable and automatable platforms.
• You document architectures, configurations, dependencies, operational processes, and technical decisions in a comprehensible and practical manner.
• You work directly with software engineers, security engineers, architects, and customer teams and take on technical leadership within a project if required.
• Several years of practical experience as a system engineer, platform engineer, DevOps engineer, infrastructure engineer, or in a comparable technical role.
• Very good knowledge of at least one server operating system stack, for example Linux or Windows Server.
• Sound understanding of TCP/IP, routing, DNS, HTTP(S), TLS, firewalls, load balancing, and fundamental network architectures.
• Experience with virtualization platforms such as VMware vSphere, Hyper-V, or comparable technologies.
• Practical experience with at least one public cloud platform such as Microsoft Azure, AWS, or Google Cloud.
• Experience with Infrastructure-as-Code, for example Terraform, as well as with configuration automation via Ansible, PowerShell, Bash, or comparable technologies.
• Good scripting or programming skills, for example in PowerShell, Python, Bash, or a comparable language.
• Experience with Git-based development and deployment workflows.
• Understanding of modern CI/CD processes and experience with platforms such as GitLab CI/CD, GitHub Actions, Azure DevOps, or Jenkins.
• Experience in building, operating, and troubleshooting productive ICT systems with high requirements for availability, security, and traceability.
• Sound understanding of Identity & Access Management, role and authorization concepts, secrets management, and fundamental security principles.
• Experience with backup, restore, and disaster recovery concepts and their technical implementation.
• The ability to systematically narrow down complex errors and analyze problems across multiple technical layers.
• A pronounced engineering mindset: You automate repetitive work, prefer reproducible configurations, and treat infrastructure as code as much as possible.
• Very good German skills as well as good technical English skills.
• In-depth experience with Kubernetes and the productive operation of containerized platforms.
• Experience with Kubernetes components and ecosystems such as Helm, Ingress Controller, Operators, or GitOps.
• Knowledge of GitOps tools such as Argo CD or Flux.
• Experience with observability stacks such as Prometheus, Grafana, OpenTelemetry, Elastic Stack, or comparable solutions.
• Experience with central log management and SIEM platforms.
• Deepened knowledge in Microsoft Azure, for example Entra ID, Azure Networking, Azure Kubernetes Service, Azure Monitor, or Azure Policy.
• Experience with Microsoft 365, Active Directory, or Entra ID integrations.
• Experience with hybrid identity, network, and cloud architectures.
• Knowledge in the area of PKI, certificate management, and secrets management, for example with HashiCorp Vault or cloud-native key management systems.
• Experience with API gateways, reverse proxies, and web servers such as nginx, Traefik, or HAProxy.
• Knowledge in the area of software development and experience in developing small internal services, APIs, or platform tools.
• Experience with relational databases, message queues, or distributed systems.
• Knowledge of Zero Trust, hardening, and security baseline concepts.
• Experience with high-availability, failover, and disaster recovery architectures.
• Experience with Immutable Infrastructure, automated image builds, or Configuration-as-Code.
• Experience with large enterprise or administrative environments with complex dependencies and increased requirements for security, governance, and compliance.
• Relevant certifications, for example Azure, AWS, Kubernetes, Red Hat, VMware, or HashiCorp.
• An exciting and versatile working environment with challenging projects.
• The opportunity to shape products that provide real add-value