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Offensive Security Engineer

Nebius· Platform Security
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Hybrid (Europe)Full-timePosted 2w ago

About the role

Hands-on engineering role joining Nebius's internal red team to design and execute adversarial simulations across the Nebius cloud platform, establish a penetration testing program, conduct research on sophisticated attack scenarios, and translate findings into actionable security improvements.

Responsibilities

  • Validate and extend early-stage Secure SDLC threat models via continuous penetration testing, assess threat severity and mitigation status, automate routine validations, reserve manual analysis for 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 affecting operations.
  • Work 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, inference stack, and AI platform managed services; assess tenant-isolation boundaries and low-level stack breakage possibilities.
  • Conduct targeted assessments of new products and infrastructure changes before they ship.
  • Deliver clear, actionable reports for technical audiences and leadership with prioritized findings and remediation guidance.
  • Establish red team processes, tooling, and a scalable methodology as the platform grows.

Qualifications

  • 6+ years in offensive security - penetration testing, red teaming, or adversary simulation
  • 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 that engineers can easily use.

Skills

Required:Offensive security experienceCloud-native securityAttack lifecycle

Benefits

  • 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
Last updated Oct 7, 2026. Interested? Apply on the company site.
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