Mobile Application Senior Security Engineer
Pubblicato il 28-09-2026 - Klarna in Bardi
In this role you will lead offensive security testing for Klarna’s mobile apps, focusing on iOS and Android; you’ll work with engineering teams to turn findings into fixes and improve app hardening. You’ll apply MASVS/MASTG guidelines to drive concrete security improvements, not just produce reports. The role combines hands‑on testing, reverse engineering, and collaboration to reduce risk in a fintech mobile ecosystem. This is a hands‑on position in a fast-moving security team with real impact on product security.Invii la sua candidatura dopo aver letto i requisiti di competenza e qualifica per questa posizione, riportati di seguito.Run offensive security assessments (penetration tests, red-team exercises, vulnerability discovery) on Klarna’s mobile apps (iOS/Android)Reverse‑engineer app binaries to uncover sandboxing, permission,
and core security weaknessesTest against OWASP MASVS/MASTG and translate results into actionable fixes with engineering teamsEvaluate and stress‑test app‑hardening and RASP protectionsDocument findings in actionable formats and ensure fixes are implemented in productionHands‑on offensive mobile security experience (pentesting, red teaming, bug bounty, or security research) against iOS/AndroidStrong understanding of mobile internals: sandboxing, permissions, security architectures of iOS and AndroidFluent with mobile security tooling (Frida, Objection, MobSF, jadx/apktool, Ghidra/Hopper, Burp Suite, mitmproxy)Familiarity with OWASP MASVS/MASTG as primary framework for security assessmentsExperience with app‑hardening and RASP; fintech/payments app security xysqume a plusPublished CVEs, talks, or track record in mobile security or bug bounty (premio)Experience shipping production mobile code or similarFamiliarity with Play Integrity/App Attest and device‑binding schemes (bonus)Strong written and verbal communication with engineersCuriosity and meticulous attention to detailOWASP MASVS/MASTGFridaObjectionMobile Application Senior Security Engineer pavia, lombardia, it#J-18808-Ljbffr