People Matter

Senior Software Engineer, Full Stack



Software Engineering
San Francisco, CA, USA
Posted on Tuesday, June 11, 2024

About the Company:

Worldcoin ( is an open-source protocol, supported by a global community of developers, individuals, economists and technologists committed to expanding participation in, and access to, the global economy. Its community is united around core beliefs in the inherent worth and equality of every individual, the right to personal privacy, and open and public collaboration. These beliefs are reflected in what the community is building: a public utility to connect everyone to the global economy.

The Worldcoin Foundation ( is the protocol’s steward and will support and grow the Worldcoin community until it becomes self-sufficient. Tools for Humanity ( is a global hardware and software development company. It helped launch Worldcoin and continues to provide support to the Foundation, in addition to operating the World App.

About the Team

This role is part of our Developers Team, which builds SDKs for developers to create applications on top of World ID and World App. World ID is a novel and cutting-edge privacy-preserving Proof of Personhood protocol that will serve as critical digital infrastructure in the age of AI. World App, one of the leading crypto wallets globally, has processed 105 million transactions since launch and over 5 million MAUs, making it the largest crypto application on Optimism.

About the Opportunity

  • Build scalable and secure developer products for both World ID and World App
  • Take the lead on designing, prioritizing and building new products to further empower existing devs and continue our top-tier developer experience
  • You will work very closely with Design, Product & Ecosystem teams to understand user and technical constraints and requirements. You will continuously talk to users of your products, such as at conferences and hackathons around the World.
  • You will work on production-grade developer tools, aimed at scalability.

About You

  • You are a full stack engineer with 5+ years of experience building secure and scalable code for products with meaningful usage.
  • Experience voicing customer feedback into product solutions (engineering makes substantive contributions to product definition)
  • Passion about practical usage of blockchain technologies. We expect everyone on our team to be familiar and use blockchain products (you can learn on the job!).
  • You are very energetic, independent and willing to roll up your sleeves.
  • You are successful in ambiguous environments, are comfortable continuously reprioritizing, and have an MVP-mindset.
  • You have very strong written communication skills and can clearly express and defend your opinions.
  • Prior experience building tools & products for developers.
  • Excited about World ID and World App.

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 and NY based roles):

The reasonably estimated salary for this role at TFH ranges from $216,000 - $240,000, 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!