Offensive Security Lead

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The Role 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. This is a hands-on leadership role within Product Security Team. You will build an internal red team, establish a penetration testing program, and conduct research to uncover sophisticated attack scenarios targeting high-value assets across the Nebius tech stack. What we’re looking for 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. Nice to have 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 security research at conferences like BlackHat/DefCon, etc. Why this role at Nebius 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