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Staff Mobile & Product Security Engineer

MrBeast· Engineering
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Remote$205k - $256kfull-timePosted 5mo ago

About the role

Security-focused role embedded with mobile and product squads to build security-in from day one for a large consumer membership ecosystem (iOS, Android, web). Hands-on security engineering, including mobile app security, application security, offensive testing, and security architecture to meet partner requirements and enable rapid business deals.

Responsibilities

  • Embed directly with mobile and product squads — membership app (iOS/Android), marketplace, data & identity — to threat-model, review, and harden features before they ship.
  • Own the mobile application security program end-to-end: secure mobile SDLC, mobile-specific code review (Swift/Kotlin/React Native, as applicable), dependency and supply-chain controls, and developer-facing security tooling.
  • Own the broader product application security program: secure-by-default patterns, API and backend security review, and paved-road tooling for engineering teams.
  • Run the pen testing program — hands-on offensive work spanning mobile (static/dynamic analysis, binary/reverse engineering, on-device attack surface) and web/API, plus coordination of external engagements — and turn findings into fixed issues.
  • Architect the security controls and documentation that meet partner security requirements, so partnership deals close on our schedule.
  • Set the security baseline for a zero-to-one, AI-native stack: coding agents, model and prompt security, mobile AI features, and the new attack surface that comes with AI-native products.
  • Write the playbook — mobile and product security standards, guardrails, and the "paved road" — so as the org scales, secure is the easy path.

Qualifications

  • Embedded Builder: security engineer on a product or mobile team, writes code, files PRs, and ships fixes.
  • Mobile Security Depth: secured native iOS and/or Android apps at consumer scale; understands mobile-specific threats and defenses.
  • AppSec at Consumer Scale: experience running or heavily contributing to an application security program for a consumer product used by millions.
  • Offensive Hands-On: ability to pen test mobile and web apps; has found real bugs and shepherded fixes.
  • Partner-Compliance Fluent: experience architecting against partner security frameworks (SOC 2, PCI, vendor security reviews, mobile app store requirements).
  • AI-Native: experience with AI-centric security considerations, coding agents, on-device and mobile AI features.
  • Scrappy & Scaled: startup-to-scale experience with nimble team and big-tech exposure.
  • Action-Oriented: thrives in ambiguity and shipping controls over policy.

Skills

Required:Mobile security engineeringThreat modelingCode review & secure SDLCPenetration testing (mobile/web)

Benefits

  • Competitive Salary
  • Generous Medical (Blue Cross Blue Shield), Dental, Vision and company-paid Life Insurance
  • Company contributions to employee Health Savings Accounts (HSA)
  • 401k Plan with Safe Harbor company-matching
  • Flexible vacation policy and paid company holidays
  • Company-provided technology package
  • Relocation assistance where applicable, including travel and company-provided housing for the first 90 days
Last updated Oct 17, 2026. Interested? Apply on the company site.

About MrBeast

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