Senior Fraud Engineer at Tools For Humanity in San Francisco, CA

About the Company: World is building 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. Our products make this possible: the Orb verifies real people, World ID proves it privately, and World App enables and distributes the new applications made possible by this technology. Together, they form a new layer for AI internet. We’re one of the fastest-growing networks in tech. More than 17 million people across 160 countries have verified with World ID, and we complete over 350,000 verifications each week. World App is already among the most used wallets globally. Developers are integrating World ID to build safer online experiences and create spaces where real people can participate, earn, and be recognized in ways AI simply can’t replicate. World was founded in 2019 and launched globally in 2023. We are more than 400 people across hardware, software, AI, cryptography, mobile engineering, and global operations. Our teams come from OpenAI, Tesla, SpaceX, Apple, Google, Stripe, Meta, Coinbase, Palantir and MIT Media Lab. We’re backed by leading investors, including a16z, Khosla Ventures, Bain Capital Crypto, Blockchain Capital, Variant, Tiger Global, and Coinbase Ventures, as well as prominent operators and founders across fintech and AI. World has been featured on the cover of TIME Magazine https://time.com/7288387/sam-altman-orb-tools-for-humanity/, highlighted in Fast Company’s https://www.fastcompany.com/91411606/fintech-blockchain-next-big-things-in-tech-2025 Next 5 in Fintech, and explored in a Bloomberg deep dive https://www.bloomberg.com/news/features/2024-08-12/how-worldcoin-is-building-digital-ids-to-combat-the-ai-apocalypse. The New York Times https://www.nytimes.com/2025/05/03/technology/world-eye-scanning-crypto-orbs-launch-in-us.html, Bankless https://www.youtube.com/watch?v=KUcjtFOHgNc and TechCrunch https://techcrunch.com/2025/04/30/world-partners-with-tinder-visa-to-bring-its-id-verifying-tech-to-more-places/ have all recognized our progress in identity, cryptography, AI, and global-scale hardware deployment. Our leadership is also named to the Time AI 100 https://time.com/collections/time100-ai-2025/. Learn more about the newest product launches from our Unwrapped https://www.youtube.com/watch?v=H2eLyItnqys event. ABOUT THE TEAM People spend fifteen seconds with an Orb, but a lifetime with the World App. As such, the App team plays a critical role in fulfilling our mission. Using the App, people can join the World network, participate in decentralized finance in a friendly and self-custodial manner, and use their WorldID to unlock services across the ecosystem. The intersection of our App and our controls for Fraud, Risk, Safety, and Security are a broad set of integrations and mechanisms to ensure the safety and security of our users and the World network. This role is a broad position with responsibility across the entire surface of our application and its related systems and tooling. ABOUT THE ROLE: - Own end-to-end the integrations of our most critical controls and ensuring that their enforcement is neither circumvented nor negatively impacting our users - Face Auth, our liveness detection and time-of-use enforcement mechanism - Integration with our Fraud Risk Engine - Systems that enable our operations teams to respond to user reports and that enforce their actions across our stack - SDK/API integrations with external providers - Client platform specific features (Android, iOS etc) to prevent misuse. - Advocate for our users, partnering with our data analytics team and our fraud/risk analytics team to identify false positives and adjust rules and system - Partner with Product teams to improve the user experience for our users that come into contact with these systems. - Provide broad review of engineering changes that affect these system - Accomplish all the above while implementing strict access controls, data retention policies, and minimizing user data collected. ABOUT YOU: - Great at cross-functional work, prioritizing, and self-organizing - Strong technical architecture skills across backend and mobile platforms - Privacy-minded and capable of adopting an adversarial mindset - Strong communication skills - Capable of direct individual contribution across our stack NICE-TO-HAVE SKILLS - Experience in security, fraud, trust & safety, or related domains. - Mobile development - being comfortable understanding the logic implemented in our android and ios applications - Data analysis and engineering experience - to help you build an understanding the true impact of controls If you don't think you meet all of the criteria below but still are interested in the job, please apply. Nobody checks every box, and we're looking for someone excited to join the team. By submitting your application, you consent to the processing and internal sharing of your CV within the company, in compliance with the GDPR. Pay transparency statement (for CA based roles): The reasonably estimated salary for this role at TFH ranges from $221,000 - $250,000, plus a competitive long term incentive package. Actual compensation is based on factors such as the candidate's skills, qualifications, and experience. In addition, TFH offers a wide range of best in class, comprehensive and inclusive employee benefits for this role including healthcare, dental, vision, a 401(k) plan and match, life insurance, flexible time off, commuter benefits, professional development stipend and much more!