Sr. Staff Security Engineer, Platform Security

nscaleoperationsukltd; United States; Remote; USD 210,000 - 270,000; Full time

Benefits offered by this job

Medical, dental, vision insurance

Paid time off

Parental leave

Equity

Bonus potential

Job summary

nscaleoperationsukltd is seeking a hands-on security leader to establish an assurance program for an infrastructure-as-a-service platform. You will investigate how GPU compute, storage, virtual networking, Kubernetes, and HPC scheduling operate, testing tenant boundaries and delivering evidence-based priorities to engineers.

You will review services, assess isolation risks, and collaborate with platform teams to implement fixes and secure defaults.

Qualifications

• Hands-on experience assessing or securing cloud infrastructure where the platform is the product.
• Ability to trace real data and control paths, review configurations, test isolation, and produce evidence.
• Experience setting security standards, threat modeling services, prioritizing findings by practical exploitability, guiding remediation.

Responsibilities

• Establish and document an assurance program across GPU compute, storage, virtual networking, Kubernetes, and HPC scheduling.
• Review platform services, document architecture, threat models, security requirements, findings, and remediation plans.
• Assess bare-metal and virtualized GPU infra, provisioning, firmware and management interfaces, and tenant teardown for isolation risks.
• Examine storage services for tenant separation, encryption, key handling, access control, snapshots, backups, secure deletion, and volume reuse.
• Test virtual network segmentation, east-west controls, and separation of tenant traffic from management networks.

Skills

Cloud security

Threat modeling

Security standards

Cross-team influence

Assurance evidence

Job description

Role overview

Establish a hands-on platform security assurance program for an infrastructure-as-a-service environment. The work focuses on understanding how GPU compute, storage, virtual networking, Kubernetes, and HPC scheduling actually operate, testing tenant boundaries, and giving engineering leaders evidence-based findings and remediation priorities.

Responsibilities

• Review platform services individually, documenting their architecture, threat models, security requirements, findings, and remediation plans.
• Assess bare-metal and virtualized GPU infrastructure, provisioning, firmware and management interfaces, accelerator assignment, and tenant teardown for isolation and data leakage risks.
• Examine storage services for tenant separation, encryption, key handling, access control, snapshots, backups, secure deletion, and volume reuse.
• Test virtual network segmentation, east-west controls, and separation of tenant traffic from management networks under realistic conditions.
• Assess multi-tenant Kubernetes and SLURM/HPC security, including identity, admission controls, node hardening, network policy, privilege boundaries, and job isolation.
• Partner with platform and infrastructure engineers to deliver fixes and secure defaults; measure control coverage and remediation trends.
• Produce evidence demonstrating whether tenant workloads remain isolated.

Requirements

• Deep, hands-on experience assessing or securing cloud infrastructure where the platform itself is the product.
• Ability to trace real data and control paths, review configurations and implementations, test isolation assumptions, and produce clear assurance evidence.
• Experience setting security standards, threat modeling services, prioritizing findings by practical exploitability, and guiding remediation.
• Strong influence and communication skills to drive changes across teams without direct authority.
• Comfort working in an ambiguous, founding-program role and building an evidence base as the security function develops.

Nice to have

• Experience securing or assessing SLURM/HPC environments.

Benefits and work setup

The listing describes a flexible workplace, annual performance reviews, and compensation that may include base pay, bonus, and equity. It gives a base salary range of $210,000-$270,000 USD and mentions potential medical, dental, vision, paid time off, parental leave, and retirement benefits.