Halliday

www.halliday.xyz

1 Job

22 Employees

About the Company

Halliday is the first agentic workflow protocol. Safely delegate tasks to autonomous systems, such as agents or software. Create breakthrough applications in hours not years.

Listed Jobs

Company Name: Halliday
Job Title: Front End Engineer
Job Description: Job Title: Front End Engineer Role Summary: Build high‑performance, responsive user interfaces for a blockchain payments platform. Deliver intuitive experiences that enable seamless on‑chain transactions and support developer SDKs and APIs. Expectations: - 2+ years of production frontend experience using React and TypeScript. - Write clean, maintainable code with a strong focus on user experience and performance. - Rapidly learn and apply new technologies (Web3 SDKs, payment APIs, emerging standards). - Collaborate effectively with product, design, engineering, and partnership teams in a fast‑paced environment. Key Responsibilities: - Design, develop, and ship responsive React/TypeScript applications that interact with blockchain networks, payment systems, and DeFi protocols. - Build reusable component libraries, design systems, and testing frameworks to support the payments platform and developer tools. - Contribute to public SDKs and APIs, enabling developers to integrate blockchain payments into their apps. - Work cross‑functionally to translate product requirements into high‑quality features that drive adoption. - Identify and implement improvements for performance, accessibility, security, and code quality across the frontend stack. - Innovate Web3 user experiences, simplifying complex on‑chain actions for end users. Required Skills: - React, TypeScript, modern JavaScript (ES6+). - State management (e.g., Redux, Zustand, Recoil). - API integration (REST/GraphQL) and asynchronous data handling. - Responsive design, CSS (styled‑components, Emotion, or similar). - Unit, integration, and end‑to‑end testing (Jest, React Testing Library, Cypress). - Performance optimization, accessibility (WCAG) and security best practices. - Familiarity with Web3 libraries (ethers.js, viem, wagmi) – a plus. - Experience with payment flows or financial product UX – a plus. - Design sensibility and collaboration with UI/UX designers – a plus. - Open‑source contributions or public library maintenance – a plus. Required Education & Certifications: - Bachelor’s degree in Computer Science, Software Engineering, or related field, or equivalent professional experience. - No mandatory certifications required.

San francisco, United states

Hybrid

Junior

22-01-2026