AI Security Engineer / Application Security Engineer (Onsite in Seattle, Washington and Sunnyvale, California. Local candidates)

Role Overview

We are seeking an experienced AI Security / Application Security Engineer to strengthen our security engineering capabilities across application security, cloud services, APIs, and AI/LLM integrations. The ideal candidate will have hands-on experience in security architecture reviews, threat modeling, vulnerability assessment, penetration testing, and adversarial testing of AI agents.

Key Responsibilities

• Conduct security and privacy design reviews for applications, APIs, cloud services, engineering proposals, and AI integrations.
• Review system architecture, data flows, access controls, trust boundaries, authentication, authorization, and security safeguards.
• Perform threat modeling for critical services and AI agents, identifying attack surfaces, attack scenarios, attack paths, mitigations, and residual risks.
• Conduct hands-on security and adversarial testing of AI/LLM agents, including:
• Prompt injection
• Tool misuse
• Excessive agency
• Unauthorized data access
• Permission and access-control issues
• External integrations
• Sensitive-data exposure
• Identify, validate, and document security vulnerabilities and provide practical remediation recommendations.
• Work closely with engineering, security, privacy, and third-party teams to drive remediation and validate security controls.
• Develop reusable security assessment methodologies, checklists, threat models, test cases, and reporting templates.
• Support security automation and AI-assisted security workflows where appropriate.

Required Qualifications

• 3+ years of professional experience in security engineering, application security, product security, offensive security, systems architecture, or a related technical security field.
• Experience reviewing complex technical designs and identifying security risks in:
• Applications
• APIs
• Cloud services
• Microservices
• Distributed systems
• Strong understanding of:
• Threat modeling
• Vulnerability assessment
• Risk modeling
• Authentication and authorization
• Least-privilege principles
• Data protection
• Security architecture
• Hands-on experience with security testing, vulnerability investigation, penetration testing, adversarial testing, or security-control validation.
• Strong technical communication skills with the ability to explain security findings to engineering and business stakeholders.

Preferred Qualifications

• Experience assessing AI/LLM applications and autonomous AI agents.
• Knowledge of prompt injection, jailbreaks, unsafe tool use, excessive agency, and AI data-security risks.
• Experience with privacy and security design reviews.
• Experience securing cloud environments.
• Security automation experience using Python, Go, Bash, or similar languages.
• Familiarity with application-security frameworks and industry security practices.

Key Skills

Application Security | AI/LLM Security | Threat Modeling | Penetration Testing | Adversarial Testing | Cloud Security | API Security | Security Architecture | Vulnerability Assessment | Privacy & Data Protection | Python/Go/Bash | Security Automation