Staff Mobile & Product Security Engineer

MrBeast

San Francisco (CA)

On-site

USD 170,000 - 250,000

Full time

4 hours ago

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Benefits offered by this job

Competitive salary

Medical/Dental/Vision Insurance

Life Insurance

401k with company match

Flexible vacation and holidays

Relocation assistance with housing for

Company-provided tech package

Job summary

Beast Industries is seeking a Staff Embedded Mobile & Product Security Engineer to own security across mobile and product surfaces in a fast-growing entertainment ecosystem. You will embed with squads, drive secure SDLC, and run a comprehensive pen testing program to harden features before release.

You will architect controls to meet partner security requirements and support AI-native product security strategies, while collaborating across security, product, and engineering teams to scale

Qualifications

Experience securing native iOS/Android apps at consumer scale.
Ability to pen test mobile and web apps and shepherd fixes.
Experience architecting partner security controls (SOC 2, PCI, vendor reviews).
Familiarity with AI-native security considerations and mobile AI features.

Responsibilities

Embed with mobile and product squads to threat-model and harden features pre-launch.
Own the mobile app security program end-to-end: SDLC security, code review, and dependency controls.
Own the broader product security program: secure-by-default patterns and API/backend reviews.
Run the pen testing program across mobile and web, coordinating external engagements.
Architect security controls to meet partner security requirements for deals.
Set baseline security for AI-native stack including mobile AI features.
Write playbooks and pave the road for secure growth as the org scales.

Skills

Embedded builder

Mobile security depth

AppSec at consumer scale

Offensive hands-on

Partner-compliance fluent

AI-native thinking

Scrappy & scaled

Action-oriented

Tools

Swift

Kotlin

React Native

Job description

Staff Embedded Mobile & Product Security Engineer

Beast Industries is a multifaceted media and entertainment company founded by Jimmy Donaldson, popularly known as MrBeast, the most watched person in the world. Renowned for revolutionizing digital content creation, Beast Industries encompasses a diverse portfolio of ventures that extend far beyond its origins on YouTube. With a mission to entertain, inspire, and create significant social impact, Beast Industries operates across various domains including digital media, philanthropy, consumer products, and innovative business initiatives. At Beast Industries, we believe in the transformative power of digital media and its potential to entertain, educate, and effect positive change. Our commitment to innovation, creativity, and philanthropy drives us to explore new frontiers, create unforgettable experiences, and build a legacy that inspires future generations.

Primary: Bay Area (San Francisco/Peninsula) | Secondary: NYC

Reports to: Director of Engineering Team: Security

About Us

The Opportunity

We are building a first-of-its-kind consumer membership ecosystem from the ground up — and when you're serving 100M+ users across iOS, Android, and web, security has to be built in from day one, not bolted on later. As our Staff Embedded Mobile & Product Security Engineer, you will be the foundational security hire on the Security team, embedded directly with product and mobile squads to ship features that are secure by design rather than secured after the fact.

This is a hands-on, build-with-the-team role. You'll own mobile and product application security, run the pen testing program (with deep focus on mobile attack surface), and architect the controls that meet partner security requirements so the business can close deals and ship with confidence.

The Product

You will be the security anchor underneath a membership ecosystem anchored around the MrBeast audience, spanning native mobile apps, web clients, and backend platform services. Your surface area spans every product squad and every partnership:

Mobile Security: iOS and Android app security — secure storage, certificate/key pinning, jailbreak/root and tamper detection, secure IPC, mobile authN/authZ flows, and hardening of the mobile SDK and build/release pipeline.
Product & Application Security: Threat modeling, secure-by-default patterns, code review, and developer-facing tooling across the membership app, creator marketplace, and platform services.
Offensive Testing: A pen testing program you own end-to-end — internal red-team exercises (including mobile-specific testing: static/dynamic analysis, reverse engineering, API abuse), coordinated external engagements and continuous validation against real attacker behavior.
Security Architecture: The control framework that lets us meet partner security requirements — and the architecture decisions that keep our mobile and product surfaces ready for the next partner, not scrambling for them.

What You'll Do

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, not tickets in a backlog.
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.

Who You Are

Embedded Builder: You've been the security engineer on a product or mobile team, not just a reviewer at the gate. You write code, file PRs, and ship fixes yourself when it's the fastest path.
Mobile Security Depth: You've secured native iOS and/or Android applications at consumer scale — you understand mobile-specific threats (reverse engineering, tampering, insecure storage, insecure IPC, mobile API abuse) and how to design against them.
AppSec at Consumer Scale: You've run or heavily contributed to an application security program inside a consumer product used by millions — and we realize that we need to design for tradeoff.
Offensive Hands‑On: You can pen test mobile and web applications, not just read pen test reports. You've found real bugs in real systems — including on-device and API‑level mobile vulnerabilities — and shepherded them through to fix.
Partner‑Compliance Fluent: You've architected against partner security frameworks (or equivalents — SOC 2, PCI, vendor security reviews, mobile app store security requirements) and know how to translate requirements to real controls without theatre.
AI‑Native: You aren't just curious about AI; you are burning, using coding agents daily and thinking about how AI changes when we build and what we have to defend — including on‑device and mobile AI features.
Scrappy & Scaled: You have the startup experience that builds from zero with nimble team, + maybe big tech exposures to know what breaks when a product hits massive scale.
Action-Oriented: You thrive in ambiguity and prefer shipping controls over writing policy. You'd rather land a fix than run a meeting.

Compensation

The target total compensation ranges from $170,000 to $250,000, an employee equity plan grant, bonus, plus comprehensive benefits.

Benefits

The Perks, Why Work On the MrBeast Team

We are redefining what entertainment and storytelling look like at global scale. Every piece of content we publish reaches millions and influences culture in real time. This is your opportunity to lead the team that decides how those moments come to life across every screen.

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