Senior App Security Tester - AI, Cloud & API Focus

Chubb Ltd.; Philadelphia, Northern (Philadelphia County, KY); Hybrid; USD 120,000 - 180,000; Full time

Job summary

Chubb Ltd. seeks a seasoned penetration tester to plan and execute security assessments across web, mobile, API, cloud-native, and AI-enabled applications.

You will collaborate with AI/ML teams to threat-model features, embed testing into CI/CD, and drive remediation through risk scoring and executive reporting. The role covers modern authentication, containerized workloads, and proactive vulnerability management in a global portfolio, requiring strong communication with technical and executive

Responsibilities

• Plan and execute penetration tests across web, mobile (iOS & Android), API, cloud-native/containerized, and AI/LLM-integrated applications
• Assess AI/ML and generative AI-powered features for risks such as prompt injection, insecure output handling, training data poisoning, model denial of service, and sensitive information disclosure, aligned to OWASP Top 10 for LLM Applications and MITRE ATLAS
• Partner with AI/ML engineering and data science teams to threat-model AI-powered features and embed security testing into MLOps and CI/CD pipelines
• Evaluate cloud-native and containerized workloads (AWS, Azure, GCP, Docker, Kubernetes) and Infrastructure as Code for misconfigurations and weak security controls
• Test modern API architectures (REST, GraphQL, gRPC), including OAuth2, OIDC, and JWT authentication and authorization flaws, and microservices-based applications
• Conduct mobile application security testing and reverse engineering, including hardcoded credentials, insecure keychain storage, and anti-emulator/obfuscation bypass
• Own the overall vulnerability remediation status of the global application portfolio, and serve as the primary point of contact for application teams on remediation matters
• Manage application risk rating processes and ensure timely risk scoring of new and changing applications
• Build and maintain dashboards and status reports for portfolio leads and CIOs, and follow up on overdue vulnerabilities to meet compliance timelines
• Develop clear, actionable penetration test reports and communicate findings and remediation strategy to both technical and executive stakeholders
• Research emerging attack techniques and tooling, and drive automation and process improvements across the testing program

Job description

Chubb Ltd. seeks a seasoned penetration tester to plan and execute security assessments across web, mobile, API, cloud-native, and AI-enabled applications.

You will collaborate with AI/ML teams to threat-model features, embed testing into CI/CD, and drive remediation through risk scoring and executive reporting. The role covers modern authentication, containerized workloads, and proactive vulnerability management in a global portfolio, requiring strong communication with technical and executive