Head of offensive security in AI cloud

Nebius; United States; Remote; USD 180,000 - 240,000; Full time

Job summary

Nebius Group is seeking an Offensive Security Lead to build and run Nebius' red team capability across our cloud stack. You will design and execute adversarial simulations on our infrastructure, translate findings into actionable security improvements, and drive security culture at scale.

You will recruit and mentor engineers, advance secure development practices, and collaborate with blue teams to close gaps and improve detection and response capabilities.

Qualifications

• 6+ years in offensive security – penetration testing, red teaming, or adversary simulation.
• 1–2+ years leading or mentoring a team.

Responsibilities

• Build and lead a red team function within the Product Security Team.
• Hire and develop offensive security engineers.
• Automate routine validations and plan full-scoped red team engagements against Nebius cloud platform.
• Deliver actionable reports with prioritized findings and remediation guidance.
• Establish scalable red team processes, tooling, and methodology.

Skills

Penetration testing

Red team leadership

Cloud security

Kubernetes privilege escalation

Python/Go tooling

Threat modeling

Purple team

Report writing (business context)

Tools

Kubernetes

Cloud platforms (AWS/GCP/Azure)

Python

Go

Job description

Описание:

The internal offensive security team is responsible for the penetration testing program, red team engagements, and offensive research aimed at uncovering sophisticated attack scenarios targeting high-value assets across the Nebius Cloud stack. We're hiring an Offensive Security Lead to build and run Nebius' red team capability. You'll design and execute adversarial simulation across our cloud platform - attacking the same infrastructure our customers depend on - and translate findings into measurable security improvements.

Задачи:

Build and lead a red team function within Product Security Team, hiring and developing offensive security engineers. Validate and extend early-stage Secure SDLC threat models via continuous penetration testing, assessing threat severity and mitigation status while challenging assumptions made during threat modeling and system development. Automate routine validations to keep pace with increasing feature flow, reserving manual analysis for genuinely complex cases. Plan and execute full-scoped red team engagements against Nebius cloud platform - including compute, storage, inference, networking, orchestration layers, and internal tooling. Identify threats, which are able to impact an organization's operations. Work closely with Detection & Response and other security engineering teams to run purple team exercises, validate detection coverage, and close gaps collaboratively. Research novel attacks against GPU infrastructure (e.g., closed-source firmware and vendor driver binaries, device passthrough exploits, SR-IOV/IOMMU misconfigurations, RDMA/InfiniBand fabric attacks, etc.), the inference stack (e.g., vLLM, TRT-LLM), and AI platform managed services (e.g., managed Slurm). Assess tenant-isolation boundaries and how they can be broken at the low-level stack Conduct targeted assessments of new products and infrastructure changes before they ship. Deliver clear, actionable reports for both technical audiences and leadership - with prioritized findings and remediation guidance. Establish red team processes, tooling, and a methodology that scales as the platform grows.

Требования:

6+ years in offensive security - penetration testing, red teaming, or adversary simulation - with at least 1-2 years leading or mentoring a team. Deep experience attacking cloud-native environments: Kubernetes privilege escalation, cloud IAM abuse, virtualization and container escapes. Strong fundamentals across the attack lifecycle: initial access, persistence, lateral movement, data exfiltration. Proficiency developing custom tooling and post-exploitation capabilities (Python, Go, or similar). Experience running purple team exercises and working constructively with blue teams. Ability to write clear, senior-level reports with business-contextualized risk (not just raw findings) that engineers can easily use. Будет плюсом: Experience attacking ML infrastructure, model serving pipelines, or GPU clusters; Reverse engineering and exploits development experience; Application security experience; Familiarity with eBPF bypass techniques or kernel-level exploitation; Background in vulnerability research or CVE discovery; Experience with cloud provider internals (hypervisor/networking layers); Presenting your security research at conferences like BlackHat/DefCon, etc

Условия:

Build a red team from scratch at a company operating frontier AI infrastructure. Attack surface that's genuinely novel - GPU clusters, AI platforms, multi-tenant cloud at scale. Work alongside world-class engineers on infrastructure that powers frontier AI. Competitive compensation with equity upside in a Nasdaq-listed, high-growth company. Flexible, remote-first culture Competitive compensation Career growth and learning opportunities Flexibility and ownership Collaborative and innovative culture Opportunity to work on impactful AI projects International environment and talented teams Fast moving - Bold thinking - Constant growth - Meaningful impact - Trust and real ownership - Opportunity to shape the future of AI