Onsite Contract: Application & AI Security Engineer

Cybersecurity Jobs; Sunnyvale (CA); On-site; USD 69,000 - 76,000; Part time

Job summary

Compest Solutions Inc seeks an Application Security Engineer / AI Security Engineer for a contract role onsite in Seattle, WA and Sunnyvale, CA. The candidate will strengthen security across apps, cloud services, APIs, and AI integrations.

Responsibilities include security/privacy design reviews, threat modeling, AI adversarial testing, and documentation with actionable remediation guidance for engineering teams. 8+ years of security experience required.

Qualifications

• 8+ years of professional experience in security engineering or related security discipline.
• Experience reviewing complex designs and identifying security risks in applications, APIs, cloud services, microservices, and distributed systems.
• Strong understanding of threat modeling, vulnerability assessment, and risk modeling.
• Strong understanding of authentication, authorization, least-privilege, and data protection.
• Strong understanding of security architecture.
• Hands-on experience with security testing, vulnerability investigation, penetration testing, adversarial testing, or security-control validation.
• Excellent technical communication skills, with ability to explain findings to engineers and business stakeholders.
• Experience assessing AI/LLM applications and autonomous AI agents (preferred).

Responsibilities

• Conduct security and privacy design reviews for applications, APIs, cloud services, engineering proposals, and AI integrations.
• Review system architecture and data flows, including access controls, trust boundaries, and authentication/authorization safeguards.
• Perform threat modeling for critical services and AI agents, documenting attack surfaces, scenarios, paths, mitigations, and residual risks.
• Lead hands-on security and adversarial testing for AI/LLM agents, including prompt injection, tool misuse, excessive agency, unauthorized data access, and external integrations.
• Identify, validate, and document security vulnerabilities, providing practical remediation recommendations.
• Collaborate with engineering, security, privacy, and third-party teams to drive remediation and validate controls.
• Develop reusable security assessment artifacts such as methodologies, checklists, threat models, test cases, and reporting templates.
• Support security automation and AI-assisted security workflows where appropriate.

Skills

Threat modeling

Vulnerability assessment

Risk modeling

Authentication and authorization

Least-privilege

Data protection

Security architecture

Security testing

Adversarial testing

Security-control validation

Technical communication

Tools

Python

Go

Bash

Job description

Compest Solutions Inc seeks an Application Security Engineer / AI Security Engineer for a contract role onsite in Seattle, WA and Sunnyvale, CA. The candidate will strengthen security across apps, cloud services, APIs, and AI integrations.

Responsibilities include security/privacy design reviews, threat modeling, AI adversarial testing, and documentation with actionable remediation guidance for engineering teams. 8+ years of security experience required.