Senior Cloud Engineer (m/f/d)

Are you comfortable working in complex cloud and infrastructure environments and ensuring that our systems run stably, securely, and efficiently? Then you’ve come to the right place! To strengthen our team, we’re looking for an experienced Senior Cloud Engineer (m/f/d) to provide technical support for our cloud and data center infrastructure and to continuously improve it.

Since 1971, we at GRASS-MERKUR in Hanover have been designing digital infrastructure that others can rely on. In our highly secure data center, featuring approximately 3,500 m² of white space, we ensure day in and day out that businesses, government agencies, and critical infrastructure are secure, reliable, and future-proof—from colocation and managed services to private cloud and network solutions. Our cloud and managed services are also certified: to ISO/IEC 27001 for information security, supplemented by ISO/IEC 27017 for cloud security and ISO/IEC 27018 for the protection of personal data.

More than 80 colleagues contribute their expertise here and together serve over 100 clients, ranging from small and medium-sized businesses to DAX-listed corporations. What we’re especially proud of: We haven’t had a single outage in the last ten years—a testament to the care and passion with which our team works.

We’re also thinking about tomorrow. With approximately 95% green electricity, certified to ISO 14001 and ISO 50001 and awarded the EcoZert 2025, we take responsibility—for our customers and for the environment. At the same time, we’re driving innovation forward: With power densities of up to 40 kW per rack, we’re specifically preparing our infrastructure for AI and high-performance computing.
Anyone who joins us becomes part of a team that embodies reliability and actively shapes the future.

At GRASS-MERKUR, you’ll find a family-run business with flat hierarchies and quick decision-making processes—now in its fifth generation. We give you the freedom to contribute your own ideas and take on responsibility right from the start. Modern, future-proof jobs, personalized professional development, and a close-knit team are all part of what we offer as a matter of course.

• Exciting and technically challenging client projects in a variety of system environments
• Opportunities for professional development
• An attractive compensation package that includes a company car
• A flexible work model with trust-based working hours
• Jobrad subsidy
• Hansefit membership

• You will operate, monitor, and optimize our OpenStack-based cloud environments during day-to-day operations and keep an eye on service monitoring.
• You will plan and prepare migrations to our OpenStack environment and oversee their implementation.
• You will automate recurring infrastructure, deployment, and operational processes using Ansible and Terraform.
• You’ll handle 2nd- and 3rd-level support and address unplanned operational issues, such as service disruptions or outages.
• You will administer and optimize our Ceph storage system for scalability and performance.
• You’ll help set up and expand our network infrastructure with a focus on SDN, BGP, and EVPN.
• You will ensure redundancy and high availability of our infrastructure in day-to-day operations.
• You will manage virtualization environments such as VMware and KVM/libvirt.

• At least 3 years of experience in the day-to-day operation of OpenStack
• Hands-on experience in operating and administering cloud environments
• Extensive hands-on experience with Infrastructure as Code (IaC) and automation using Ansible and Terraform
• Specialized knowledge of OpenStack core services (Keystone, Neutron, Glance, Cinder, Nova)
• Hands-on experience with Ceph, particularly in day-to-day operations and performance optimization
• Solid understanding of network architectures with a focus on SDN, BGP, and EVPN
• Practical experience with redundancy and high-availability concepts
• Expert knowledge of Linux, Kernel-based Virtual Machine (KVM), and enterprise automation tools
• A strong hands-on approach and a structured, solution-oriented way of working
• Strong communication skills when interacting with internal and external contacts
• Personal initiative and a strong sense of responsibility for the stability of our systems
• Strong customer and solution focus, as well as a passion for working in a team
• Ability to work effectively in a team
• Business-level English