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Senior Frontend Engineer, Blockchain Payments

Halliday • San Francisco Bay Area
Visa Sponsorship
This Job is No Longer Active This position is no longer accepting applications
AI Summary

Seeking a Senior Frontend Engineer to build consumer-facing crypto and payments products using React and TypeScript. This role involves designing and implementing intuitive, high-performance interfaces for blockchain transactions. Requires 5+ years of experience, strong technical proficiency, and a product mindset.

Key Highlights
Build user-facing products for blockchain payments.
Develop core infrastructure and ship developer tools.
Innovate on Web3 UX and drive technical excellence.
Key Responsibilities
Design and develop responsive, performant frontend applications using React and TypeScript that interact with blockchain networks, payment systems, and DeFi protocols while delivering an exceptional user experience.
Build scalable components, design systems, and testing frameworks that support our payments platform and developer tools.
Contribute to Halliday's public SDKs and APIs, making it easy for developers to integrate blockchain payments into their applications.
Collaborate with product, design, engineering, and partnerships teams to deliver features that solve real user problems and drive product adoption.
Identify and implement improvements to enhance performance, accessibility, security, and code quality across our frontend stack.
Push the boundaries of what's possible in blockchain user experiences, making complex onchain actions feel simple and intuitive.

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Technical Skills Required
React TypeScript Frontend Development
Benefits & Perks
Competitive compensation package
Unlimited PTO
Visa sponsorship

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Nice to Have
Previous work with blockchain technologies such as EVM-based chains, Solana, or Bitcoin.
Familiarity with Web3 libraries like ethers.js, viem, or wagmi.
Experience building payment flows, checkout experiences, or financial products.
Comfort working across the stack when needed, including APIs and backend services.
Strong eye for design and experience working closely with designers to implement pixel-perfect interfaces.
Active participation in open source projects or maintenance of public libraries.

Job Description

About Halliday

Halliday is a blockchain company and product lab working to create a unified, cross-chain payments ecosystem. Its flagship product, Halliday Payments, is a unified payments platform that makes it easy for users to onramp, swap, and take other onchain actions. Halliday’s products are built on the Workflow Protocol, which removes the need to code smart contracts by hand and enables breakthrough applications to ship in hours, not years.

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Job Overview
Posted Aug 27, 2026
Employment Full-time
Experience Mid-Senior level
Location San Francisco Bay Area
Category Programming
Company Halliday
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