Senior iOS Security Engineer; ProdSec

Senior iOS Security Engineer (Prod Sec) at iProov

Senior iOS Security Engineer

About iProov

iProov provides science-based biometric solutions that enable the world’s most security-conscious organizations to streamline secure remote onboarding and authentication for digital and physical access. Our award-winning liveness technology and iSOC offer unmatched resilience against deepfakes and generative AI threats while ensuring effortless, scalable user experiences. Trusted by leading governments and enterprises, including the U.S. Department of Homeland Security, U.K. Home Office, Gov Tech Singapore, ING, and UBS, iProov sets the standard in biometric identity assurance.

The Role

Reports to: Head of Red Team

Location: UK

Comp: Negotiable (Base) + Company Performance Bonus (10%) + Share Options + UK iProov Benefits

We are seeking an iOS Security Engineer to join our Product Security team and help secure our iOS applications, SDKs, and biometric verification technologies against evolving threats.

This role focuses on researching, designing, and implementing advanced mobile security protections, with a particular emphasis on application hardening, Runtime Application Self-Protection (RASP), anti-tampering controls, and runtime trust assessment. You will play a key role in identifying emerging attack techniques targeting mobile and biometric ecosystems and developing innovative defenses to protect our products and customers.

The successful candidate combines deep iOS engineering expertise with a security mindset and a passion for understanding how attackers operate. They will work closely with Science and Engineering teams to ensure security is embedded throughout the product lifecycle.

• Design and implement security controls for iOS applications and SDKs.
• Develop protections against reverse engineering, runtime manipulation, code injection, dynamic instrumentation, and application tampering.
• Implement and enhance jailbreak detection, application integrity validation, and runtime protection mechanisms.
• Design secure approaches for protecting sensitive data, cryptographic assets, and biometric-related workflows.
• Define and promote mobile security best practices across engineering teams.

• Research emerging mobile attack techniques targeting biometric identity verification systems, including runtime manipulation, device compromise, and application abuse.
• Evaluate, prototype, and implement Runtime Application Self-Protection (RASP) controls for iOS applications and SDKs.
• Assess the effectiveness of commercial and custom mobile protection technologies against evolving threats.
• Develop novel approaches to application integrity, runtime trust assessment, anti-tampering, anti-debugging, and anti-instrumentation controls.
• Investigate bypass techniques used by attackers and security researchers to identify gaps in existing protections.
• Be a key member of the Product Security function, collaborating with Science, Red Team and Engineering teams to evaluate, develop, and enhance security controls for biometric verification products and services.
• Contribute to the security roadmap by identifying opportunities to strengthen trust signals within biometric verification workflows.
• Produce technical research, proof-of-concepts, and recommendations based on threat trends affecting digital identity and biometric ecosystems.

• Perform security architecture reviews and code reviews.
• Assess security implications of new platform capabilities, third-party libraries, and architectural changes.
• Build security tooling, frameworks, and libraries that improve the security posture of iOS products.
• Contribute to security standards, design patterns, and technical guidance for mobile development teams.
• Participate in strategic security initiatives and long‑term product security planning.

• 3+ years of professional iOS development experience.
• 2+ years of experience in mobile security, application security, or product security.
• Proven experience designing and implementing security…