Senior Infrastructure Engineer, Linux, Network & Physical Systems (m/f/d)

About the role

At ARX Robotics, you will operate the infrastructure that supports next-generation autonomous robotic systems across hybrid and restricted environments. As a (Senior) Infrastructure Engineer – Linux, Network & Physical Systems, you will help build and maintain the operational backbone behind secure, reliable, and recoverable engineering and deployment environments.

While the role is not primarily a cloud engineering role, ARX operates in a hybrid reality across physical infrastructure, restricted environments, public cloud, and SaaS. You should therefore be comfortable working at the boundaries between on-prem systems, cloud platforms, identity, networking, monitoring, and security controls.

This role is designed for someone who genuinely enjoys infrastructure engineering. Whether you run a home lab, self-host services, build networks for fun, or care deeply about reliable Linux systems and clean operational practices, your mindset will fit well here. You will work hands-on across Linux systems, networking, storage, monitoring, backup, and recovery while helping shape scalable infrastructure operations for demanding and security-conscious environments.

What You’ll Build

• Operate and maintain Linux servers, virtualization platforms, storage systems, backups, and monitoring infrastructure
• Configure and troubleshoot physical networking including switches, VLANs, routing, firewalling, cabling, and rack/server infrastructure
• Support VPN, ZTNA, DNS, routing, segmentation, and hybrid connectivity across operational environments
• Build and maintain hardened infrastructure baselines, patch management processes, backup verification, and recovery procedures
• Contribute to secure and scalable infrastructure operations across restricted and non-restricted environments
• Establish and improve monitoring, alerting, logging, and operational observability for critical systems
• Support controlled infrastructure operations including access management, audit logging, environment separation, and operational evidence collection
• Help maintain clear operational boundaries between public, internal, and restricted infrastructure environments
• Automate repetitive operational tasks using scripting and infrastructure tooling
• Support cloud-connected infrastructure patterns, including identity federation, logging export, monitoring integration, backup paths, and secure connectivity between physical, virtual, and cloud environments.
• Work with platform and cloud engineers on infrastructure-as-code, landing-zone guardrails, and operational standards where Linux, networking, storage, or hybrid connectivity meet public cloud infrastructure.
• Participate in incident response, recovery testing, operational readiness, and future on-call operations
• Contribute to documentation, operational runbooks, and long-term infrastructure reliability practices

What You Bring

• Strong hands-on experience operating and maintaining Linux-based systems in production environments
• Solid understanding of networking fundamentals including TCP/IP, DNS, routing, VLANs, VPN/ZTNA, firewalling, and segmentation
• Experience managing physical or virtual infrastructure including servers, storage systems, virtualization platforms, backups, and monitoring solutions
• Confidence troubleshooting issues across Linux systems, networking, storage, and infrastructure operations
• Experience automating workflows using Bash, Python, Ansible, Terraform, or similar tooling
• Security-conscious mindset with practical experience in access management, patching, logging, and operational separation
• Understanding of the discipline required in restricted or regulated environments, including least-privilege access, documented changes, backup verification, and controlled information handling
• Strong analytical and organizational skills with a practical, hands-on approach to infrastructure engineering
• Experience with VS-NfD environments, defense-sector IT, SINA-based systems, classified infrastructure, or accreditation-oriented operations is highly valuable
• Familiarity with at least one major cloud platform or sovereign cloud environment, especially around networking, IAM, logging, compute, storage, or infrastructure-as-code, is beneficial.
• Experience with monitoring and observability platforms such as Grafana, Prometheus, Loki, ELK, or Zabbix is beneficial.
• Personal projects or experience related to Linux, self-hosting, networking, hardware, or home lab environments are highly appreciated

Please note: You do not need to meet every single requirement to apply. We welcome motivated candidates who are eager to grow into the role and develop their expertise further.|

What We Offer

Join a mission-driven European defense tech company at a pivotal stage of growth, where you can help shape meaningful technology, take ownership early, and grow with the business!

• Competitive compensation package including a bonus opportunity
• 27 vacation days to start, increasing with tenure up to 30 days
• Employer-supported pension contribution
• Learning & development support and team events budget
• Employee discounts and flexible benefits budget via Probonio
• Hybrid working setup depending on role and team needs
• Structured salary bands, levelling framework, and bi-annual development conversations
• Referral bonus program, dog-friendly office, and relocation support where applicable

About Us

ARX is a dual-use technology company that specializes in developing autonomous unmanned systems and sensors for the European defence sector. Our dual-use unmanned ground systems and sensors assist NATO Armies and civilian first responders in tackling their most challenging problems by providing them with training and information to make better decisions and take effective actions in life-or-death situations.

As our team continues to expand rapidly, we are seeking motivated candidates who are excited to work in a highly energetic, creative, and innovative team dedicated to developing autonomous systems for challenging environments. We operate in a dynamic sector where collaboration, sharing innovative ideas, and developing novel problem-solving strategies are ingrained in our work culture.

If you are passionate about overcoming challenges that have a real impact on the security of our democracies, apply here to join ARX and help shape the future of dual-use technology!


ARX is an equal-opportunity employer, and we encourage candidates from all backgrounds to apply.

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