Full Stack Software Engineer

Full Stack Software Engineer, World

San Francisco — World

• Web SDK Development:
  You will own the design, development, and maintenance of our public-facing JavaScript/Type Script SDK, ensuring it is designed for the future, robust, well-documented, and easy for partners to use.
• Partner Integrations:
  You will work directly with our partners to support their integration efforts, building reference applications, browser add-ons, and other tools to ensure their success on our platform.
• API Development:
  You will build and scale efficient, reliable APIs and backend services using Type Script to support our own applications, SDKs, and partner needs. This includes everything from simple web API servers, backend services and user-facing web components.
• Web Application Development:
  You will design, build and maintain essential web components, reference implementations and end user facing applications that use World .
• Cross-functional Collaboration:
  
  You will work closely with product managers, designers, other engineers and other XFN stakeholders to deliver cohesive and impactful solutions that advance the World network.
• Technical leadership:
  You may be asked to support a small group of junior engineers and external contractors as a hands‑on technical lead, guiding technical design, contributing and reviewing code, and ensuring urgency, completeness and quality of the projects.

You have a proven track record of building high‑quality web applications and well designed developer APIs and SDK. You are fluent in the modern web stack and possess the backend proficiency to build and manage the services that power your applications. You are passionate about creating excellent developer experiences and understand that the success of an SDK is measured by the success of the developers who use it.

You can communicate clearly, work effectively in a fast‑paced environment, and are motivated by the challenge of building the user‑ and developer‑facing layers of an ambitious, world‑changing protocol. You are an effective and respected tech lead of small teams.

• Excellent communication skills and a collaborative mindset, with the ability to articulate technical concepts to both technical and non‑technical audiences.
• Experience supporting third‑party developers and partner integrations.
• Expertise with modern web frameworks based on JavaScript and Type Script.
• Experience building and maintaining public-facing SDKs or developer‑focused libraries.
• Experience with server‑side development and building RESTful APIs (familiarity with Go, Rust, or other compiled languages is a plus).
• Ability to work across the full stack, from web servers and simple database interactions to client‑side application logic.

The reasonably estimated salary for this role at TFH ranges from $220,000 - $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!

Worldcoin participates in the E-Verify Program.

Worldcoin is an Equal Opportunity / Affirmative Action employer committed to diversity in the workplace. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, age, national origin, disability, protected veteran status, gender identity or any other factor protected by applicable federal, state or local laws. Worldcoin is also committed to working with and providing reasonable accommodations to individuals with disabilities.

Please let your recruiter know if you need an accommodation at any point during the interview process.