Senior Engineer, Software Security (AI)

Location: London, England, United Kingdom; full-time in the London office five days a week. Occasional home working is allowed for personal needs, but this is not a hybrid role. Candidates should live within a 60-minute commute of the office.

Company

hirify.global is a London-founded technology company building phones, audio products, and an operating system used by millions of people across more than 40 markets.

What you will do

• Own the security lifecycle and secure architecture for backend services, cloud platforms, and CI/CD pipelines from design through live operations.
• Define secure development standards and integrate SAST, DAST, and SBOM tooling into the software delivery process.
• Manage vulnerabilities end to end, including discovery, triage, prioritization, and driving remediation with engineering teams.
• Design penetration testing and fuzzing strategies, and build security tools that engineers can run independently.
• Deliver API security, WAFs, gateways, runtime defenses, and encryption for data in transit and at rest.
• Lead threat modelling and partner with mobile, OS, desktop, privacy, and legal teams on client security and global regulatory requirements, including emerging AI technologies.

Requirements

• 6+ years of application security experience, including designing security architecture for commercial products and managing production security posture.
• Deep threat modelling expertise, with the ability to define company-wide methodologies.
• Hands-on cloud security experience across AWS, GCP, Azure, and other hyperscalers.
• Strong command of secure SDLC practices, including SAST, DAST, and SBOM, with sound vulnerability prioritization judgment.
• Experience applying AI or LLMs to security through threat simulation, defense testing, and countermeasure development.
• Solid cryptography and identity fundamentals, including TLS, OAuth 2.0, SSO, and token management, plus production-quality coding in Python, Go, Java, and C++.

Culture & Benefits

• Work primarily from the London Kings Cross and Farringdon offices.
• Occasional home working is available for personal needs.
• Collaborate across backend, cloud, data, mobile, OS, desktop, privacy, and legal functions.
• Build security foundations for products used by millions of people worldwide.