Senior Frontend Engineer

Halliday

Senior Frontend Engineer building user-facing crypto and payments products for blockchain company. Leading frontend development with React and TypeScript in a hybrid work setting.

Posted 6/25/2026full-timeSan Francisco • California, New York • 🇺🇸 United StatesSenior💰 $150,000 - $250,000 per yearWebsite

Tech Stack

Tools & technologies

ReactTypeScript

About the role

Key responsibilities & impact

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.

Requirements

What you’ll need

2+ years of experience building production frontend applications with React and TypeScript
Strong understanding of modern frontend development including state management, API integration, responsive design, and performance optimization
You think beyond just implementing features you understand the 'why' behind what you're building and advocate for the best user experience.
You're excited to dive into new technologies, whether that's blockchain SDKs, payment APIs, or emerging web standards.
You work well with cross-functional teams, communicate effectively, and thrive in a fast-paced startup environment.

Benefits

Comp & perks

Competitive compensation package, with unlimited PTO
Friendly work environment
Visa sponsorship for international candidates

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

ReactTypeScriptfrontend developmentstate managementAPI integrationresponsive designperformance optimizationtesting frameworksblockchain SDKspayment APIs

Soft Skills

user experience advocacycross-functional collaborationeffective communicationproblem-solvingadaptability