Remote App Security Engineer (Contract)

confidential; United States; Remote; USD 120,000 - 180,000; Part time

Job summary

Zekai is seeking an App Security Expert on a 100% remote contract basis. You will design fixtures with embedded vulnerabilities or secure solutions, craft deterministic tests, and generate hidden keys for evaluation of secure vs vulnerable code. Collaboration will span documenting methods and sharing findings with teams worldwide.

The role emphasizes strong writing, security architecture experience, and the ability to deliver actionable recommendations in a remote setting.

Qualifications

• Extensive experience in application security or CyberSWE roles.
• Strong understanding of OSWE, LLM security, AI-SAST, and AppSec best practices.
• Proven track record in designing or evaluating security architecture for traditional and agent-based apps.
• Expertise in building, securing, and testing application codebases for vulnerabilities.
• Excellent written and verbal communication with precise technical documentation.
• Experience with synthetic security fixtures and deterministic testing approaches.
• Ability to deliver actionable security recommendations remotely.

Responsibilities

• Design and implement small, purpose-built app fixtures with vulnerabilities or secure solutions.
• Develop deterministic test cases and security-context manifests to assess posture.
• Create hidden answer keys for AI or scanner evaluation of secure vs vulnerable code.
• Evaluate and iterate on pipelines to keep tasks challenging yet realistic.
• Document technical insights and methodologies clearly.
• Collaborate through precise written and verbal communication to share findings.
• Engage with agent-based security architecture and improve the evaluation pipeline.

Skills

Application security

Secure software development

OSWE

LLM security

AI-SAST

Security architecture

Security testing

Communication skills

Synthetic fixtures

Remote collaboration

Tools

Static analysis tools

AI-powered analysis

Job description

Zekai is seeking an App Security Expert on a 100% remote contract basis. You will design fixtures with embedded vulnerabilities or secure solutions, craft deterministic tests, and generate hidden keys for evaluation of secure vs vulnerable code. Collaboration will span documenting methods and sharing findings with teams worldwide.

The role emphasizes strong writing, security architecture experience, and the ability to deliver actionable recommendations in a remote setting.