Full Stack Software Engineer, World ID

SupportFinity™

San Francisco (CA)

On-site

USD 220,000 - 250,000

Full time

14 days+

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Benefits offered by this job

Healthcare

Dental

Vision

401(k) plan and match

Life insurance

Flexible time off

Commuter benefits

Professional development stipend

Much more!

Job summary

World ID is seeking a Full Stack Software Engineer to help expand the World ID ecosystem. You will define and build developer-facing APIs, Web SDKs, user apps, and partner integrations that showcase the power of World ID in the era of AGI.

Your role centers on bridging the core protocol with real-world applications, serving as a primary touchpoint for partners, and collaborating with cross-functional teams to deliver robust, scalable solutions.

Qualifications

Excellent communication skills and a collaborative mindset, able to explain technical concepts to diverse audiences.
Experience supporting third-party developers and partner integrations.
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; Go or Rust familiarity is a plus.

Responsibilities

Web SDK Development: own design, development, and maintenance of public JS/TS SDK for partners.
Partner Integrations: work with partners to support integration efforts and reference apps.
API Development: build scalable backend services and RESTful APIs.
Web Application Development: design and maintain web components and end-user apps using World ID.
Cross-functional Collaboration: work with product, design, and other engineers to deliver cohesive solutions.
Technical leadership: mentor junior engineers and contractors, review code, ensure quality.

Skills

JavaScript/TypeScript

Web frameworks

SDK development

API design

Go/Rust familiarity

Full stack

Developer communication

Team leadership

Job description

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. Learn more about the newest product launches from our Unwrapped event.

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.

The Opportunity

As a Full Stack Software Engineer, you will be at the forefront of expanding the World ID ecosystem. You’ll work on defining and building the developer facing APIs, Web SDKs, user facing applications and partner integrations that would delight developers and users alike, and showcase the power of World ID in solving the novel challenges posed by AGI.

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

Web SDK Development: You will own the design, development, and maintenance of our public-facing JavaScript/TypeScript 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 TypeScript 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 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.
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.

About You

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.

Requirements

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 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.

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 $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.