Senior/Staff Mobile Security Engineer
💰 $251,000 – $325,000/yr
At a glance
- Who can apply
- Worldwide
- Work arrangement
- Remote · Worldwide
- Employment type
- Full-time
- Salary
- $251,000 – $325,000/yr · published by the employer
- ✓ Open to early-career candidates
Checked against the employer's source on October 15, 2026. Details come from the employer's posting; confirm them on the application page.
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Job Description
About Tools for Humanity
Tools for Humanity (TFH) designs and builds technology behind World, a real human network designed to accelerate people in the age of AI. As bots and autonomous agents reshape the internet, people, institutions, and applications need a trusted way to confirm who is a real human while preserving privacy.
The TFH and World tech stacks make this possible: the Orb verifies real, unique people, World ID proves it privately, and World App puts these capabilities in people's hands. Together, they add a human layer to an AI-driven internet.
Global Scale & Impact:
- 17+ million people across 160 countries verified with World ID
- World App among the most used wallets globally
- Developers integrating World ID to build safer online experiences
Company Profile:
- Founded 2019, 400+ employees across hardware, software, AI, cryptography, mobile engineering, and global operations
- Team members from OpenAI, Tesla, SpaceX, Apple, Google, Stripe, Meta, Coinbase, Palantir, and MIT Media Lab
- Backed by a16z, Khosla Ventures, Bain Capital Crypto, Blockchain Capital, Variant, Tiger Global, and Coinbase Ventures
- Featured in TIME Magazine, Fast Company, Bloomberg, The New York Times, TechCrunch, and Bankless
About the Role
The Security team at Tools for Humanity operates at a level far beyond a regular company. The objective is not just to secure an organization, but to build trusted, foundational infrastructure for the world's large-scale identity and verification ecosystem.
As a Senior/Staff Mobile Security Engineer, you will drive mobile security strategy and implementation across World App and related products serving millions of users globally.
What We're Looking For
- Expert-level mobile security architecture and threat modeling
- Deep experience securing iOS and/or Android applications at scale
- Proven ability to influence and lead cross-functional security initiatives
- Experience with cryptographic implementations and secure key management
- Track record in identity, authentication, or financial services security
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