Software Engineer, Protocol

Position: Staff Software Engineer, Protocol
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

The Protocol team at TFH consists of a group of engineers focused on shipping production‑grade systems at the edge of cryptography, Ethereum/L2s, and zero‑knowledge. We design and implement trustless, decentralized, and privacy‑preserving systems that are built to scale to billions of users. Our work powers World , World Chain and other protocols within the World ecosystem, pushing the boundaries of what’s possible with decentralized identity and blockchain scalability.

We regularly collaborate with leading teams in the Ethereum ecosystem as well as contribute to open research and protocol design.

About The Opportunity

In this role, you will drive development of the core protocols that power the World ecosystem including services that support World , World Chain, and related systems. You will contribute to the design and implementation of existing software, and engage in protocol‑related efforts exploring the cutting edge of blockchain scalability. This is a highly collaborative role where you will often be working closely with other teams at TFH to build mission‑critical services at the foundation of the World ecosystem.

Key Responsibilities

• Drive the design and implementation of production‑ready services to support the World ecosystem

• Write clean, efficient and maintainable code in Rust

• Own features from design to deployment and provide thorough code review to help increase the maintainability of critical services

• Collaborate with teams across a variety of disciplines including cryptography, blockchain infrastructure, AI, and hardware to solve challenging problems and deliver robust, scalable solutions

• Take ownership of deployments, monitoring, and long‑term maintenance of services in production

About You

• 10+ years of professional software engineering experience, including at least 2+ years building in production with Rust

• You have a T‑shaped skillset and bring strong technical depth in areas like distributed systems, protocol design, blockchain, zero‑knowledge cryptography or related topics and you’re eager to lead in one or more of these domains

• You have extensive experience running services in production and are well‑versed in distributed tracing, logging, metrics, alerting, and on‑call operations. You’ve been through incident response and know what it’s like to be in the war room

• You value clean, well‑tested code and understand the importance of engineering best practices in writing scalable, maintainable software

• Above all, you’re excited to help shape the foundation of a privacy‑preserving digital identity ecosystem

What We Offer

• An open and collaborative office space in downtown SF

• Unlimited PTO

• Monthly phone reimbursement or a company device

• Daily in‑office meals

• Top‑tier medical, dental, vision insurance

• 401k + employer match program

Pay Transparency Statement (for CA and NY Based Roles)

The reasonably estimated salary for this role at TFH ranges from $225,000 - $275,000, 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, 401(k) plan and match, life insurance, flexible time off, commuter benefits, professional development stipend and much more!

By submitting your application, you consent to the processing and internal sharing of your CV within the company, in compliance with the GDPR.

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