Senior Infrastructure Engineer

Sthenos AI is the AI developer of EFA Group, building intelligent, mission-ready solutions for defense and aerospace. With deep expertise in Command-and-Control (C2), cyber defense, computer vision, and autonomous systems, we design and deploy secure, field-proven AI that enhances operational efficiency and situational awareness. As part of a leading European defense ecosystem, we bring scalable innovation where it matters most — in the theater of operations.

As a Senior Infrastructure Engineer (f/m/d) you are a Day-1 engineer responsible for designing, implementing and maintaining the distributed infrastructure backbone for a customer of Sthenos AI.

• You manage and implement a highly available, distributed and virtualized data center infrastructure that serves as the foundation for a next generation AI-based intelligence platform.
• You design and implement the network architecture, compute, storage and virtualization layers of an on-premises environment to ensure scalability, performance and resilience.
• You design and implement a Kubernetes-based platform for running distributed workloads, ensuring optimal integration with networking, storage and hardware resources.
• You plan, deploy and operate virtualized infrastructure environments including compute clusters, hypervisors and software-defined networking.
• You define and implement hardware configurations and infrastructure standards, including GPUs, networking equipment and storage systems.
• You design high-performance networking architectures, including routing, switching, load balancing and secure interconnection between distributed infrastructure components.
• You operate a variety of different databases and storage solutions and make sure that they run smoothly and according to the performance standards set by the platform.
• You manage the different environments of the infrastructure and monitor continuously their capacity for taking proactive measures and ensuring their future growth.
• You ensure the reliability, performance and security of the infrastructure by defining operational standards, monitoring systems and incident response processes.
• You automate infrastructure provisioning and lifecycle management using Infrastructure as Code and configuration management tools.
• You collaborate closely with the platform vendor, ML engineers and data scientists to ensure the infrastructure supports demanding AI workloads and distributed computing requirements.
• You continuously evaluate and introduce new infrastructure technologies and best practices to improve efficiency, scalability and resilience.
• You act as a technical authority and mentor for the infrastructure and platform engineering teams.

Your skills

• Graduate degree in Computer Science, Informatics, Electrical Engineering or a related field.
• Hands-on engineering mindset with a strong passion for designing, building and operating data center infrastructure.
• At least 8–10 years of experience designing and operating complex infrastructure systems, preferably in high-performance or distributed environments.
• Deep expertise in networking, including routing, switching, VLAN/VXLAN, firewalls, load balancing and software-defined networking.
• Strong experience with virtualization technologies such as VMware or similar hypervisor platforms.
• Extensive experience designing and operating Kubernetes clusters for large-scale distributed workloads.
• Strong knowledge of Linux operating systems and system internals.
• Solid understanding of server hardware architecture, including CPU, memory, storage and networking configurations.
• Experience with storage systems such as distributed storage, SAN/NAS, and software-defined storage.
• Strong experience with relational and NoSQL databases but also modern object stores.
• Proven experience with automation and Infrastructure as Code, preferably using Terraform, Ansible or similar tools.
• Experience with observability, monitoring and performance tuning of infrastructure systems.
• Experience with DevOps best practices and the implementation of CI/CD pipelines.
• Strong understanding of high availability, fault tolerance and disaster recovery strategies.

Your competencies

• You have good analytical skills and you can split a complex problem down to its individual parts.
• Team work is not alien to you and you like working together with highly-skilled engineers and scientists but are not afraid to have accountability and move forward with bold decisions when technical challenges arise.
• You implement new ideas independently and show perseverance when it comes to defending agreed concepts.
• Your communication skills allow you to conduct knowledge transfer of complicated technical topics in an easy manner to other audiences.
• You bring perseverance and constructive assertiveness.
• You can speak English fluently.

We Offer

• Competitive remuneration package
• Private medical insurance package
• Continuous learning & development opportunities
• Participation in cultural and team-building activities
• Exposure to a growing environment with cutting-edge technologies
• Corporate wellness initiatives