App Security Expert – Remote

RemoteJobsOne; Jacksonville (FL); Remote; USD 55,000 - 110,000; Part time

Job summary

RemoteJobsOne seeks an App Security Expert to contribute to real-world app security projects on a fully remote, worldwide basis. You will design fixtures, create deterministic tests, and generate detailed evaluation materials to support AI models and security assessments.

Requires 5+ years in application security or CyberSWE-like roles, knowledge of OSWE/LLM security, and strong written communication. This is a contractor role with global reach and competitive hourly pay.

Qualifications

• Extensive experience in application security and secure software practices.
• Proven ability to design or evaluate security architectures for apps.
• Experience with AI-SAST, LLM security concepts, and OWASP risk areas.
• Strong skills in documenting findings and sharing feedback remotely.
• Experience with synthetic security fixtures and deterministic testing approaches is a plus.

Responsibilities

• Design and implement small, purpose-built application fixtures with embedded security vulnerabilities or secure solutions.
• Develop deterministic test cases and security-context manifests to assess application security posture.
• Create detailed hidden answer keys to enable AI or scanner evaluation of vulnerable vs. secure code.
• Evaluate and iterate on pipeline methodologies to ensure fixtures are challenging yet realistic for AppSec assessment.
• Document technical insights and methodologies with clear written feedback.
• Collaborate through clear and thorough written and verbal communication to share findings.
• Engage with agent-based security architecture and contribute to pipeline improvement.

Skills

Application security

Secure software development

OSWE/LLM security

Security architecture

Vulnerability testing

Technical writing

Remote collaboration

Job description

App Security Expert – Remote (Worldwide)

This is a fully remote position, open to candidates based in 55 countries, including United States, United Kingdom, Canada, Germany, India, France, Netherlands, Singapore.

Pay: $40–$80/hr

Role Title: App Security Expert

Role Type: Contractor

Location: Remote

We are engaging App Security Experts to contribute to a customer’s dynamic project focused on real-world application security. In this role, you'll apply your expertise to help train next-generation AI systems. Your work will shape how models learn, reason, and perform through high-quality, real-world input. No prior experience in AI is required — your domain knowledge is what matters.

Scope of Work

• Design and implement small, purpose-built application fixtures with embedded security vulnerabilities or secure solutions, specifically addressing OWASP LLM risks such as Sensitive Information Disclosure and Excessive Agency.
• Develop deterministic test cases and security-context manifests to robustly assess application security posture.
• Create detailed hidden answer keys to enable accurate AI or scanner evaluation of vulnerable versus secure code.
• Evaluate and iterate on pipeline methodologies to ensure synthetic tasks and fixtures are challenging yet realistic for AppSec assessment.
• Document technical insights and methodologies, ensuring clarity in written feedback and communication.
• Collaborate through clear and thorough written and verbal communication to share findings and review peer contributions.
• Engage with agent-based security architecture and contribute to continuous improvement of the evaluation pipeline.

Preferred Qualifications

• Extensive experience (ideally 5+ years) in application security, secure software development, or CyberSWE roles.
• Strong understanding of OSWE, LLM security, AI-powered static analysis (AI-SAST), and AppSec best practices.
• Proven track record designing or evaluating security architecture for traditional and agent-based applications.
• Expertise in building, securing, and testing application codebases, including identifying and remediating advanced vulnerabilities.
• Exceptional written and verbal communication skills, with a focus on precise technical documentation and collaborative feedback.
• Experience with synthetic security fixtures and deterministic testing approaches is highly desirable.
• Demonstrated ability to deliver thoughtful insights and actionable security recommendations in a remote contribution context.