Senior Offensive Security Engineer: Red Team & AI Security

Perplexity; Greater London; On-site; GBP 90,000 - 130,000; Full time

Job summary

Perplexity is seeking a highly skilled Offensive Security Engineer to lead red team operations, penetration testing, and attack simulations across cloud infrastructure, web and mobile apps, AI/ML pipelines, and corporate environments. You will identify real vulnerabilities and work with engineering to remediate them, driving security across CI/CD and supply chain practices.

With 5+ years of hands-on experience, you will bring deep expertise in cloud/web security, Kubernetes, and offensive

Qualifications

• 5+ years of hands-on experience in offensive security
• Deep technical expertise in cloud security (AWS/GCP/Azure) or web/API/app security or Kubernetes/container security
• Track record of discovering vulnerabilities or novel attack techniques
• Strong programming/scripting in Python or Go
• Excellent written and verbal communication to explain risk
• Experience with AI/ML security or agentic workflows
• Bonus: security research publications or conference talks

Responsibilities

• Plan and execute red team and purple team engagements simulating advanced threat actors across cloud infrastructure (AWS, Kubernetes), endpoints, and application surfaces
• Conduct continuous penetration testing of web applications, APIs, mobile clients, browser extensions, cloud infrastructure, and internal services
• Assess AI/ML-specific attack surfaces including prompt injection, model exfiltration, agent abuse, tool-use exploitation, and MCP security boundaries
• Develop and maintain custom offensive tooling, exploits, and automation to improve the efficiency and coverage of security testing
• Perform open-scope adversary simulations that test detection and response capabilities end to end, collaborating closely with the defensive security team
• Drive threat modeling sessions with engineering teams to identify and prioritize attack vectors in new features and architectures
• Deliver clear, actionable findings to both technical and executive audiences; partner with engineering to validate remediations
• Contribute to the security of CI/CD pipelines, supply chain integrity, and secrets management through offensive assessment
• Stay current on emerging attack techniques, vulnerability research, and adversary tradecraft; bring external perspective into Perplexity's security strategy

Job description

Perplexity is seeking a highly skilled Offensive Security Engineer to lead red team operations, penetration testing, and attack simulations across cloud infrastructure, web and mobile apps, AI/ML pipelines, and corporate environments. You will identify real vulnerabilities and work with engineering to remediate them, driving security across CI/CD and supply chain practices.

With 5+ years of hands-on experience, you will bring deep expertise in cloud/web security, Kubernetes, and offensive