Network Security Engineer - Secure, Scalable AI Compute

Fluidstack; Austin (TX); On-site; USD 242,000 - 284,000; Full time

Job summary

Fluidstack is seeking a security-focused engineer to design and defend the network security architecture across data centers, corporate networks, and cloud environments. You will build and tune detection telemetry and ensure secure segmentation across IT/OT compute, and automate security controls for rapid site onboarding.

The role emphasizes hands-on work with NDR/flow-based detection, firewall-as-code, and collaboration with cross-functional teams to protect frontier AI infrastructure.

Qualifications

• You secure production networks at scale and can read a packet capture.
• You design segmentation for IT/OT environments and high-value compute.
• You deploy and tune NDR or flow-based detection to find intrusions.
• You work infrastructure-as-code: firewall rules in a repo, not a GUI.

Responsibilities

• Design and defend network security architecture across data centers, corp, and cloud.
• Build network detection telemetry, flow analysis, and alerting across training fabrics.
• Harden the OT and BMS side, where the network touches physical plant.
• Automate network security controls so new sites inherit the architecture on day one.

Skills

Network security

IaC (infrastructure as code)

Firewall configuration

Threat detection (NDR/flow)

Cross-functional collaboration

Tools

Zeek

Suricata

Flow analysis

Job description

Fluidstack is seeking a security-focused engineer to design and defend the network security architecture across data centers, corporate networks, and cloud environments. You will build and tune detection telemetry and ensure secure segmentation across IT/OT compute, and automate security controls for rapid site onboarding.

The role emphasizes hands-on work with NDR/flow-based detection, firewall-as-code, and collaboration with cross-functional teams to protect frontier AI infrastructure.