Fluidstack · 6 hours ago
Staff Network Security Engineer
New York, NY
Full-time
Onsite
Senior Level, Lead/Staff
$200K/yr - $350K/yr
5+ years expFluidstack is building the infrastructure for abundant intelligence, partnering with top AI labs and enterprises. They are seeking a seasoned Staff Network Security Engineer to lead their security strategy and protect their cloud platform through advanced network safeguards and a security-first culture.
Cloud ComputingCloud StorageGenerative AIGPUInformation TechnologyMachine LearningPrivate CloudSoftware
Responsibilities
Architect and deploy resilient protections at the network edge —including perimeter firewalls, proxy layers, WAFs, and CDN-based controls—to shield Fluidstack’s globally distributed footprint
Create and maintain sophisticated DDoS-defense programs that preserve uptime
Continuously analyze traffic, fine-tune safeguards such as rate-limiting and traffic filtering, and react decisively to volumetric spikes or atypical patterns
Lead the rollout of a Zero-Trust model across Fluidstack’s cloud and network domains
Engineer solutions that enforce least-privilege, continuous verification, and service micro-segmentation, eliminating implicit trust at every tier
Stand up comprehensive network-security monitoring to surface threats early
Detect indicators of compromise, hunt for vulnerabilities, and orchestrate rapid incident-response actions to limit blast radius
Collaborate closely with Networking, Infrastructure, SRE/DevOps, and Software Engineering to embed security best practices into designs, deployments, and pipelines
Offer expert input during architecture and code reviews to guarantee security-by-design
Champion security initiatives and cultivate a security-first culture
Coach junior engineers and peer teams on network-security fundamentals, deliver training, and model strict adherence to policies and standards
Author, refine, and enforce security policies and SOPs suited to a highly scalable, distributed environment
Periodically reassess network and cloud-security posture, ensuring alignment with industry benchmarks as the company scales
Qualification
Required
5 + years in hands-on network-security engineering, protecting large-scale cloud or hyperscale environments and complex distributed systems
Deep expertise in edge-protection technologies - DDoS mitigation, web-exploit defense, and Zero-Trust implementations
Strong conceptual and practical command of modern cloud and network security
Proficient in protocols (TCP/IP, DNS, BGP, HTTP/S), segmentation, VPNs, and firewall tuning; experienced securing AWS, GCP, Azure, or bespoke hyperscale and containerized platforms
Demonstrated ability to own security programs end-to-end, mentor engineers, and instill a security-centric mindset across varied teams
Excellent at partnering with Networking, Infrastructure, DevOps/SRE, and Software groups to craft security solutions that protect critical assets while empowering the business
Skilled in crafting and evaluating security controls for massively scalable systems, and familiar with frameworks such as NIST, ISO 27001, and SOC 2 in cloud contexts
Preferred
Experience inside a top-tier cloud provider or hyperscale setting (FAANG-class or similar) and familiarity with unique security challenges at extreme scale
Acquainted with enterprise-grade DDoS and web-application-security platforms - Cloudflare, AWS Shield, Akamai, Arbor, F5, etc. - and adept at tuning WAF rules and traffic-scrubbing tactics
Hands-on design of Zero-Trust networks, including IAM, SSO, MFA, and NAC solutions
Comfortable scripting or coding (Python, Go, etc.) to automate security workflows, integrate tools, and secure IaC and CI/CD pipelines
Credentials such as CISSP, CCSP, GIAC (GSEC, GCIH, …), or cloud-security specialties (AWS/Azure) that attest to a solid security foundation
Active in the security community or open-source projects, with current knowledge of emerging threats, vulnerabilities, and defenses in network and cloud security
Benefits
Retirement or pension plan, in line with local norms.
Health, dental, and vision insurance.
Generous PTO policy, in line with local norms.
Company
Fluidstack
FluidStack is an AI cloud platform for frontier labs and startups.
51-200 employees
H1B Sponsorship
Fluidstack has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (1)
2024 (2)
Funding
Current Stage
Growth StageTotal Funding
$450MKey Investors
Seedcamp
2026-01-22Undisclosed· $450M
2025-06-01Undisclosed
2024-10-01Private Equity
Leadership Team
Gary Wu
CEO, Co-Founder
Recent News
2026-02-03
2026-01-23
2026-01-20
Company data provided by crunchbase