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Security Engineer, Offensive Security

Fluidstack· Security & Corp IT
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San Francisco, CA, New York, NY, Austin, TX, U.S. Remote, Seattle, WA$224k - $275kFull-timePosted today

About the role

Build Fluidstack's offensive security program from the ground up, including methodology, tooling, and engagement cadence; run red and purple team operations across cloud, endpoints, and bare metal; test critical systems including data center hardware and OT/firmware; collaborate with teams on AI-specific attack scenarios; develop AI-assisted offensive testing tools; present findings to technical and executive audiences to shape the security roadmap.

Responsibilities

  • Build Fluidstack's offensive security program from the ground up, including its methodology, tooling, and engagement cadence.
  • Run red and purple team operations emulating advanced threat actors across our cloud infrastructure, endpoints and bare metal deployments.
  • Pen test critical systems, including tenant isolation, bare metal GPU hosts, firmware and BMCs, and data center OT.
  • Partner with security and engineering teams on AI-specific attack scenarios, including agentic systems and other novel AI-enabled risks.
  • Contribute to AI-assisted offensive testing tools and workflows.
  • Present findings to technical and executive audiences as clear, actionable risk that shapes the security roadmap.
  • Live on the bleeding edge of AI-enabled offensive operations inside and outside our environments

Qualifications

  • You have years of hands-on experience in red teaming and offensive security operations.
  • You have deep expertise in at least two of: macOS, Linux, cloud (AWS, GCP, Azure), Kubernetes, CI/CD pipelines.
  • You've found novel attack paths and chained vulnerabilities into full compromise.
  • You've run adversary simulations against well-defended environments.
  • You write quality code in Python, Go, or similar languages.
  • You write findings that get fixed and help teams prioritize risk.
  • You've worked closely with blue teams.

Skills

Required:Red teaming / offensive security operationsLinuxCloud platformsProgramming
Nice to have:macOSKubernetesCI/CD security
Last updated Oct 27, 2026. Interested? Apply on the company site.
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About Fluidstack

Fluidstack builds civilization-scale infrastructure for AI

Fluidstack builds civilization-scale infrastructure for AI, delivering gigawatts of compute in 6 months. We're leading the deployment of Anthropic's $50B compute build out.

AI infrastructurecompute centershardwaresoftwarepowerdata centersAnthropicfrontier compute
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