Senior Product Security Engineer — Secure by Design at Scale

Trainline's Security Team seeks a Senior Product Security Engineer to own the product security roadmap across the development lifecycle. You will partner with SRE and Platform Engineering to embed security by design, protecting web, mobile, and API services while mentoring teams and driving automation.

This role requires hands-on expertise in vulnerability management, code reviews, and security testing. You will lead threat modelling, oversee third-party penetration tests, and strengthen app/API

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