Job Summary:
Halliday is a blockchain company and product lab focused on creating a unified payments ecosystem. They are seeking a Senior Frontend Engineer with expertise in React and TypeScript to build consumer-facing crypto and payments products, enhancing user experiences in blockchain transactions.
Responsibilities:
• Build User-Facing Products: 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.
• Develop Core Infrastructure: Build scalable components, design systems, and testing frameworks that support our payments platform and developer tools.
• Ship Developer Tools: Contribute to Halliday's public SDKs and APIs, making it easy for developers to integrate blockchain payments into their applications.
• Work Cross-Functionally: Collaborate with product, design, engineering, and partnerships teams to deliver features that solve real user problems and drive product adoption.
• Drive Technical Excellence: Identify and implement improvements to enhance performance, accessibility, security, and code quality across our frontend stack.
• Innovate on Web3 UX: Push the boundaries of what's possible in blockchain user experiences, making complex onchain actions feel simple and intuitive.
Qualifications:
Required:
• 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 write clean, maintainable code and care deeply about user experience.
• 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.
• Based in or willing to relocate to the San Francisco Bay Area or New York City.
Preferred:
• 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.
Company:
Halliday is a workflow protocol designed to automate workflows and manage reliability across various systems. Founded in 2022, the company is headquartered in San Francisco, USA, with a team of 11-50 employees. The company is currently Early Stage.