Senior AppSec Engineer – Lead Secure SDLC & Modelling

Flagstone is recruiting a Senior Application Security Engineer to own AppSec end-to-end across the development lifecycle. You will partner with product engineering teams to embed security from design through deployment, not as an afterthought.

In this hands-on role, you will lead threat modelling, secure design reviews, and secure coding practices, while building scalable security programs, champions, and risk management across the application estate.

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