Staff Product Design Engineer

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, highlighted in Fast Company’s Next 5 in Fintech, and explored in a Bloomberg deep dive. The New York Times, Bankless and TechCrunch have all recognized our progress in identity, cryptography, AI, and global-scale hardware deployment. Our leadership is also named to the Time AI 100.

This opportunity would be with Tools for Humanity.

About the Team:

The Device Team at Tools for Humanity is responsible for all aspects of driving the Supply Chain, Manufacturing, Logistics, Physical Security, Field Operational Compliance, and Technical Support of our world‑class hardware devices reaching billions of people globally. We are a rapidly growing, highly cross‑functional team that strategically partners with industrial design, optics, software, market operations, and finance teams to define product requirements and execute on development. Join our dynamic team and contribute to the operational excellence of our organization. We offer competitive compensation, professional development opportunities, and a collaborative work environment.

About The Opportunity:

Tools for Humanity is looking for a creative mechanical engineer who, based on the product requirements, will support the product in all phases from research and development through design and prototype manufacturing to handover to our contract manufacturers. Our goal is to design innovative, reliable and manufacturable mechanical components and systems to ultimately produce a perfectly functioning and visually appealing product.

Core Responsibilities:

• Design components and systems based on product requirements

• Perform a full lifecycle product development (design, develop, test, manufacture and implement)

• Collaborate mainly with Industrial design, Electrical engineering and Supply chain

• Produce outline designs and evaluate theoretical designs

• Build prototypes and methodically conducting experiments, analyzing data and interpreting results

• Alter and modify design to meet requirements and to eliminate malfunctions and find effective solutions to emerging problems

• Evaluate final product’s overall performance, reliability and safety

• Collaborate with SupplyChain/Production to verify and possibly improve manufacturability

• Material selection and estimation of manufacturing costs

• Prepare product and component documentation

About You:

• Proven working experience in mechanical engineering

• Working experience with finite element analysis (FEA), computational fluid dynamics (CFD) and product lifecycle management (PLM)

• Strong hands‑on experience with 3D engineering design and manufacturing tools (Solid Works, PTC Creo)

• Creativity and analytical skills

• Solid understanding of core concepts including mechanics, kinematics, thermodynamics and materials science

• Working experience in the design of injection molded components

• Bachelor’s or Master’s degree in a relevant field (mechanical engineering or mechatronics)

• Exceptional communication and collaboration skills.

• Proficient in English, with strong written and verbal communication skills.

• Strong drive and work ethic to drive projects to successful completion.

Nice-to-Haves:

• Experience in the tech industry, particularly with electronic devices

• Previous experience with fast‑moving startups.

What we offer:

• An open and collaborative office space in downtown SF

• Unlimited PTO

• Monthly Phone Reimbursement or a company device

• In‑office meals

• Top‑tier medical, dental, vision insurance

• 401k + employer match program

If you are passionate about designing smart and feature‑integrated components and systems for innovative hardware products and want to be part of a team shaping the future of the global economy, we would like to hear from you! Apply now at Tools for Humanity and make a difference on a global scale.

Pay transparency statement (for CA and NY based roles):

The reasonably estimated salary for this role at TFH in San Francisco ranges from $246,000 - $280,000, 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!