Lead App Security Engineer – Threat Modeling & Tooling

Company: Klarna
Apply for the Lead App Security Engineer – Threat Modeling & Tooling
Location: London
Job Description:

Klarna in London is seeking a Lead Engineer for the Secure Development team to help prevent security flaws before they reach production. You will work hands-on with engineering, perform threat modeling and architecture reviews, and drive security improvements across services.

The role emphasizes building tooling, automation, and robust security processes, with opportunities to influence design decisions and mentor engineers across multiple Klarna platforms and countries.

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Posted: September 13th, 2026