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# Security Engineer, Network

- **Company:** Fluidstack Ltd
- **Location:** Austin, TX, United States
- **Contract:** Permanent contract
- **Skills:** Artificial Intelligence, Cloud Computing, Cyber Security, Data Centers, Data-Flow Analysis, Network Security, Logical Security, Network Architecture, Service Pack, Computer Network Operations, Firewalls (Computer Science), Bare Metal
- **Published:** October 31, 2026
- **Apply:** https://www.careerbuilder.com/job-details/security-engineer-network-austin-tx--55dfae20-78cd-4ae3-87c7-45af0f0aa572

## About the Role

Artificial Intelligence (AI), Network Operations Center, Software Patches, Physical Security, Security Architecture, Network Security, Cloud Computing, Firewalls, Network Architecture/Engineering, Reporting Dashboards

## Description

* Be a barrel. Full autonomy. Own things end to end, take on scope without being asked, no permission required to operate outside your core role.
 * Insane urgency. We drive everything forward as fast as possible.
 * Reason from first principles. Challenge every assumption. Zero analogy thinking, no egos, the best idea wins.
 * Love of the game. The frontier of AI is the most interesting problem of our time. We put in long hours at high intensity to push the frontier forward.
 * Build something that actually matters. If you're going to spend your time, spend it on something that matters to the world.

The Security Team

Examples of key problems the team is working on

 * You're securing the frontier of AI. The model weights training on our infrastructure are the most valuable and most targeted artifacts in technology, and we're standing up the compute to hold them faster than anyone ever has. A breach isn't a leak, it's the frontier walking out the door.
 * Build the entire security program from scratch. Most leaders inherit someone else's system and spend a career patching it. Here you own it end to end, bare metal to boardroom, as we scale across continents.
 * Your threat surface is measured in gigawatts. The customers running on our infrastructure are building the most consequential technology in human history, and being responsible for the physical and logical security of that work makes everything else feel small.

Role Scope

 * 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.