Frontier AI Infra Network Security Engineer

Fluidstack; San Francisco (CA); On-site; USD 242,000 - 284,000; Full time

Job summary

Fluidstack is hiring for a network security role within the Security Team to protect our frontier compute infrastructure across data centers, corp, and cloud. You will design, defend, and automate security controls at scale.

The ideal candidate has hands-on experience securing production networks, performing packet capture analysis, and deploying NDR/flow-based detections. If you thrive in fast-paced environments and love tackling hard infrastructure challenges, apply.

Qualifications

• You’ve secured production networks at scale and you read a packet capture as comfortably as a dashboard.
• You’ve designed segmentation for environments that mix IT, OT, and high-value compute.
• You've deployed and tuned NDR or flow-based detection that found real intrusions.
• You work infrastructure-as-code: your firewall rules live in a repo, not a GUI.
• Bonus: OT and ICs security, data center or cloud provider environments, BGP and routing security.

Responsibilities

• Design and defend the network security architecture across data centers, corp, and cloud: segmentation, firewalls, and east-west controls at gigawatt scale.
• Build network detection: telemetry, flow analysis, and alerting across training fabrics, OT networks, and the WAN.
• Harden the OT and BMS side, where the network touches physical plant, against threats most security teams never see.
• Automate network security controls so new sites inherit the architecture on day one.

Skills

Network Security

Packet Capture Analysis

Network Segmentation

NDR/Flow Detection

Infrastructure as Code

Tools

Zeek

Suricata

Telemetry & Detection Tools

Job description

Fluidstack is hiring for a network security role within the Security Team to protect our frontier compute infrastructure across data centers, corp, and cloud. You will design, defend, and automate security controls at scale.

The ideal candidate has hands-on experience securing production networks, performing packet capture analysis, and deploying NDR/flow-based detections. If you thrive in fast-paced environments and love tackling hard infrastructure challenges, apply.