Senior Software Engineer, Web & Full Stack

About the Company:

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.

About the team:

World ID is a digital identity system and proof of humanity for everyone, designed to be a foundational identity protocol for the internet in the era of AGI. It is built to be self-custodial, secure, decentralized and open, setting new standards for privacy and transparency.

At the heart of World ID are groundbreaking innovations in hardware and software—spanning distributed systems, cryptography, sensors, biometrics, machine learning and blockchain technology.

About the Opportunity:

As a Software Engineer, Web and Full Stack, you will be at the forefront of expanding the World ID ecosystem. You’ll work on defining and building the developer and user facing APIs, web experiences, developer tools and SDKs, as well as end user applications that would delight users and showcase the power of World ID to advance the adoption of World network.

Your work will be the primary touchpoint for our partners, making their success your own. This role is ideal for a web developer with strong backend skills who is passionate about building the bridges between a core protocol and its real-world applications.

Your responsibilities include:

• SDK Development: You will own the design, development, and maintenance of our public-facing JavaScript/TypeScript SDK, ensuring it is 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 and Backend Services: You will build and scale efficient, reliable APIs and backend services using TypeScript to support our web applications, SDKs, and partner needs. This includes everything from simple web servers to the backend logic for 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 ID.
  

• 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.

About you:

You have a proven track record of building high-quality web applications and developer tools. 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.

Requirements:

• Expertise with modern web frameworks based on JavaScript and TypeScript.

• 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.

• Experience supporting third-party developers and partner integrations.

• Excellent communication skills and a collaborative mindset, with the ability to articulate technical concepts to both technical and non-technical audiences.