FluidStack
Network Security Engineer
About this role
Fluidstack seeks a Network Security Engineer to design and defend network security architecture across data centers and cloud infrastructure at massive scale, protecting AI model weights and training compute. You'll build detection systems, harden operational technology networks, and automate security controls across a rapidly expanding global footprint.
What you'll do
- Design and defend network security architecture including segmentation, firewalls, and east-west controls across data centers, corporate networks, and cloud
- Build network detection capabilities using telemetry, flow analysis, and alerting for training fabrics and operational technology networks
- Harden operational technology and building management systems against physical plant-level threats
- Automate network security controls to ensure new sites inherit the architecture on day one
- Deploy and tune network detection and response or flow-based detection systems to identify real intrusions
- Partner with network engineering teams to balance security with operational velocity
What they're looking for
- Production network security at scale and packet capture analysis
- Network segmentation design for mixed IT, OT, and high-value compute environments
- Network Detection and Response (NDR) or flow-based detection deployment and tuning
- Infrastructure-as-code for firewall rules and security controls
- Operational technology (OT) and industrial control systems (ICS) security
- BGP and routing security
- Zeek or Suricata experience
- Data center or cloud provider security environments
Opens the official application on the employer’s site. No login required.
FluidStack
FluidStack builds AI infrastructure at scale, developing data centers and warehouse operations designed to handle gigawatt-capacity compute deployment. The company is hiring for warehouse engineers, data center operations specialists, product engineers, and people leaders to support rapid infrastructure expansion across multiple sites.
- Website
- fluidstack.io
Likely interview questions
- Describe a production network segmentation you designed that mixed IT, OT, and compute resources—what were the key challenges and how did you address east-west traffic controls?
- Walk us through a real intrusion you detected using NDR or flow analysis—what signals alerted you and how did you respond?