World is a network of real humans, built on privacy-preserving proof-of-human technology, and powered by a globally inclusive financial network that enables the free flow of digital assets for all. It is built to connect, empower, and be owned by everyone.
Join the Device Security Team – Pioneering the Future of Secure Technology
Are you ready to redefine the boundaries of device security? The Device Security Team at TFH is a tight-knit group of industry-leading security experts and hackers, united by a shared passion for innovation and our bold mission. This team is at the forefront of safeguarding every aspect of device security across its entire lifecycle—from manufacturing to decommissioning—and across all layers, from hardware and firmware to the software stack.
Our work goes beyond traditional assessments; we invent. From crafting groundbreaking security solutions for provisioning devices in hostile factory environments to developing advanced attestation mechanisms, we set new standards in transparency, decentralization, and innovation. Each feature we build reflects our commitment to creating industry-first technologies with meaningful global impact.
Here, you’ll tackle extraordinary challenges you won’t find anywhere else, working on projects that push the limits of what’s possible in device security. If you're driven by curiosity, motivated by impact, and excited to collaborate with some of the brightest minds in the field, this is the team for you. Be part of a journey that’s as ambitious as it is rewarding. Let’s build the future of secure technology together.
About the Role:
In this role, you’ll collaborate with industry-leading security experts and hackers to design and develop groundbreaking security technologies that set new standards for device protection. You will have the opportunities to work on a variety of exciting and impactful areas, for example:
- Reinventing and implementing secure boot mechanisms to address practical challenges, such as anti-rollback, device demotion or decommissioning, personalized configuration files, while maintaining robust security.
- Hardening device software by adopting sophisticated protection mechanisms, such as mandatory access control, system integrity protection, virtualization, and so on.
- Redefining the standard of peripheral security and firmware security, to protect peripheral and firmware against the most sophisticated attacks in both hardware and software.
- Developing advanced tamper detection and response mechanisms to ensure devices remain resilient and secure, even in the most hostile environments.
- Redesigning platform software architecture with a security-first perspective by applying advanced technologies, such as a formally verification kernel, virtualization, and implementing it in products.
This role offers the chance to work on challenges that are not only technically demanding but also uniquely meaningful, with opportunities to leave a lasting impact on the industry.
About You:
- 5 to 10+ years of experience designing and delivering security-critical systems for internet-connected embedded devices. This may include hardware oracles, robotic systems, IoT devices, or automotive systems.
- In-depth knowledge of TEE, secure boot, Linux security, Android or iOS security, or TPM,
- In-depth knowledge of peripheral security, firmware security, or hardware security
- Strong critical thinking, communication, and leadership abilities, with a proven track record of driving initiatives forward effectively.
- Thrives in fast-paced, collaborative environments and is motivated to tackle challenges with a team-first attitude.
We know that no one checks every box, so if you’re excited about this role but don’t meet all the criteria below, we encourage you to apply. We’re looking for passionate individuals eager to contribute and grow with our team. If you’re energized by working at the intersection of innovation and security, we’d love to hear from you!
Nice-to-Have Skills:
- Experience with seL4, formal verification, transparency technologies, smart contract
What we offer:
- An open and collaborative office space in downtown SF
- Unlimited PTO
- Monthly Phone Reimbursement or a company device
- Daily DoorDash credit for in-office meals
- Top-tier medical, dental, vision insurance
- 401k + employer match program
The reasonably estimated salary for this role at TFH in San Francisco ranges from $280,000 - $320,000, plus a competitive long term incentive package, and may include variable compensation. 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 and mental health benefits, a 401(k) plan and match, life insurance, flexible time off, commuter benefits, professional development stipend and much more!
Top Skills
What We Do
Worldcoin is a new, decentralized global currency that will be distributed fairly to as many people as possible. Worldcoin will launch by giving a free share to everyone on Earth. We believe that this is an essential step to accelerate the transition towards a more inclusive global economy, providing new ways for everyone to share future prosperity.
