Senior Frontend Engineer

What you'll be doing

• 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.

What we’re looking for

• Frontend Expertise: 2+ years of experience building production frontend applications with React and TypeScript. You write clean, maintainable code and care deeply about user experience.
• Technical Proficiency: Strong understanding of modern frontend development including state management, API integration, responsive design, and performance optimization.
• Product Mindset: You think beyond just implementing features, you understand the "why" behind what you're building and advocate for the best user experience.
• Fast Learner: You're excited to dive into new technologies, whether that's blockchain SDKs, payment APIs, or emerging web standards.
• Collaborative Spirit: You work well with cross-functional teams, communicate effectively, and thrive in a fast-paced startup environment.

Nice to haves

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

Compensation

• The base salary range for this role is $150,000 - $250,000. This reflects the minimum and maximum range across all US locations. This does not include equity or benefits.