Senior Mobile Security Engineer – Offensive Pentesting (iOS/Android)

Klarna is hiring a Mobile Application Senior Security Engineer in London to own offensive security for Klarna’s mobile surface. You will perform penetration tests, red-team exercises, and binary reversals to expose sandboxing and permission weaknesses before attackers do.

You’ll work with engineers to turn findings into concrete fixes while aligning with MASVS/MASTG guidelines. The role emphasizes collaboration with multiple teams, hands-on testing across iOS and Android, and delivery of

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