Staff Mobile Security Engineer
Core
Design and operate detection and enforcement systems defending against fraud rings, bot farms, credential stuffing, and account takeover across native mobile clients and backend services.
Role type
Staff Mobile Security Engineer (end-to-end domain ownership)
Builds
Adversarial-facing infrastructure including server-authoritative detection pipelines, attestation systems, and authentication hardening
Domain
Mobile security, fraud prevention, and abuse defense
Required skills
Security engineering, account takeover defense, bot abuse mitigation, fraud detection, native iOS/Android client internals, distributed backend services, Go programming, cloud infrastructure (AWS)
Preferred skills
Experience with very large-scale mobile products (hundreds of millions of users/sessions)
Responsibilities
Own device attestation, session enforcement, and authentication hardening; Define multi-quarter security roadmap; Set technical direction and mentor engineers; Balance user trust, growth, risk, platform reliability, and cost discipline
Seniority
Staff, hands-on IC with team leadership
