Senior Application Security Engineer (AI)

TL;DR

Senior Application Security Engineer (Python/Cybersecurity): Securing the application layer for a human data infrastructure platform used in AI development with an accent on vulnerability remediation, security tooling, and secure SDLC. Focus on finding and fixing code-level vulnerabilities, implementing automated security scanning in CI/CD, and performing rigorous threat modeling for large-scale systems.

Location: Remote, UK

Company

hirify.global provides the human data infrastructure essential for developing accurate and aligned AI systems by connecting researchers with a global pool of participants.

What you will do

• Act as the technical authority on application security, working hands-on to identify and remediate vulnerabilities in the codebase.
• Perform security testing, including penetration tests and code reviews using tools like Burp Suite.
• Build and maintain security tooling and automation using Python.
• Implement and tune SAST, SCA, DAST, and secret scanning within CI/CD pipelines.
• Lead threat modeling sessions for new features and complex architectures.
• Collaborate with product engineering, platform, and TechOps teams to embed secure development practices across the SDLC.

Requirements

• Several years of experience in application/product security and software engineering.
• Strong knowledge of OWASP Top 10 (Web & API) and modern attack paths (auth flaws, SSRF, injection, business logic abuse).
• Hands-on security testing experience across web apps and APIs.
• Proficiency in Python for security tooling, automation, or custom detection.
• Practical experience implementing security scanning tools in CI/CD.
• Must be based in the UK

Nice to have

• Experience with Django, Vue.js, MongoDB, or GCP.
• Knowledge of supply chain security, SBOMs, and dependency review.
• IaC security experience (e.g., Terraform, policy-as-code).
• Hands-on certifications such as OSCP, GWAPT, or BSCP.
• Experience building security practices in scaling environments.

Culture & Benefits

• Remote working arrangement.
• Competitive salary and comprehensive benefits package.
• Opportunity to work at the forefront of AI innovation with a unique human data platform.
• Impactful, mission-driven culture focused on ethical data sourcing.