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.

We are looking for a Principal Infrastructure Architect responsible for designing, implementing and maintaining the distributed infrastructure backbone for a customer of Sthenos AI.

Responsibilities

• You architect and manage 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 server architectures, 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, architectures 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

Your Competencies

• You have good analytical skills and you can split a complex problem down to its individual parts.
• You excel in collaborative environments, working effectively alongside highly skilled engineers and scientists, while confidently taking ownership and making bold, well‑reasoned 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.

We Offer

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