Sr. Staff Security Engineer, Platform Security

The posting, as Nscale wrote it

About Nscale

Nscale is the GPU cloud engineered for AI. We provide cost-effective, high-performance infrastructure for AI start-ups and large enterprise customers. Nscale enables AI-focused companies to achieve superior results by reducing the complexity of AI development. Our GPU cloud bolsters technical capabilities and directly supports strategic business outcomes, including cost management, rapid innovation, and environmental responsibility.

We thrive on a culture of relentless innovation, ownership, and accountability, where every team member takes pride in their work and drives it with excellence and urgency. As an Nscaler, you’ll build trust through openness and transparency, where everyone is inspired to do their best work. If you join our team, you’ll be contributing to building the technology that powers the future.

About the Role

We are hiring a Senior Staff Security Engineer as a founding member of Nscale's Platform Security program. Your job is to go deep on how our IaaS platform is actually built — not how the diagrams say it is built — and to perform the security reviews that tell leadership and customers where it holds, where it doesn't, and what it will take to close the gap.

The scope is the infrastructure layer: the GPU compute platform, storage, virtual networking, and Kubernetes. Across each of these you'll map the architecture, define what secure looks like, review designs and implementations against that standard, test isolation boundaries, and produce assurance evidence. The estate spans bare-metal GPU infrastructure, Slurm/HPC scheduling, and Kubernetes.

This is a hands-on assurance role. You will spend most of your time inside the platform — reading configuration, tracing data and control paths, breaking isolation assumptions, and working alongside platform, SRE, and infrastructure engineering to land fixes. You will have done this before, at a cloud services provider, where the platform was the product.

What you'll be doing

Platform security reviews

• Perform deep-dive security reviews of Nscale's IaaS services, one service at a time, producing a documented architecture, threat model, findings, and remediation plan for each.
• Define the security requirements baseline for each service and review designs and implementations against it.
• Prioritise findings by exploitability in our environment.
• Advise leadership on what is known, verified, accepted, and required to close platform security gaps.

GPU compute platform

• Review the bare-metal and virtualised GPU compute stack: host provisioning, hypervisor and GPU passthrough or partitioning, firmware and BMC management, and tenant reprovisioning.
• Verify that a tenant cannot reach, persist on, or learn from hardware after their lease ends.
• Assess the out-of-band management plane and its separation from tenant-reachable networks.

Storage

• Review block, object, and file storage services for tenant data separation, encryption at rest and in transit

[…]
s + equity), with performance reviews every 12 months. 🚀

• Join one of the fastest-growing AI infrastructure companies — your chance to directly shape how global AI capacity is planned and deployed. ✨
• Expect a dynamic progression plan tailored to your ambitions. Grow by leading critical cross-functional initiatives and shaping capital strategy — always with our full support.
• Human-First Flexibility: We treat you as humans first. 🫶🏽 Our flexible workplace trusts Nscalers to deliver, giving you the autonomy to shape your day around life's moments.

Equal Opportunities Statement

We strongly encourage applications from people of colour, the LGBTQ+ community, people with disabilities, neurodivergent people, parents, carers, and people from lower socio-economic backgrounds.

If there’s anything we can do to accommodate your specific situation, please let us know.

The responsibilities outlined in this job description are not exhaustive and are intended to provide a general overview of the position. The employee may be required to perform additional duties, tasks, and responsibilities as assigned by management, consistent with the skills and qualifications required for the role.

For information on how Nscale handles candidate personal data, please see our Employee & Candidate Privacy Notice: Here.
The range below reflects the base salary for the position. Actual compensation may vary based on job-related factors such as skill set, experience, education, and location. In addition to base salary, this role may be eligible for bonus, equity, and/or commission programs. Nscale may offer a competitive benefits package including medical, dental, vision, flexible paid time off, parental leave, and retirement plan participation.

Salary Range
$210,000 — $270,000 USD

For information on how Nscale handles candidate personal data, please see our Employee & Candidate Privacy Notice: Here.

Nscale does not accept unsolicited candidate submissions from recruitment agencies.