Senior Frontend Engineer - Blockchain Payments & SDKs

Jobtailor; California (MO); On-site; USD 110,000 - 170,000; Full time

Job summary

Halliday is seeking a front-end engineer to design and develop responsive, high-performing frontend applications using React and TypeScript. You'll interact with blockchain networks, payment systems, and DeFi protocols to deliver exceptional user experiences.

You will build scalable components, design systems, and testing frameworks for our payments platform and developer tools, collaborating with product, design, and engineering teams to ship features that matter while improving performance,

Qualifications

• 2+ years of production frontend experience 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.

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.

Skills

React

TypeScript

Frontend development

Performance optimization

Design systems

Tools

Blockchain SDKs

Payments APIs

Job description

Halliday is seeking a front-end engineer to design and develop responsive, high-performing frontend applications using React and TypeScript. You'll interact with blockchain networks, payment systems, and DeFi protocols to deliver exceptional user experiences.

You will build scalable components, design systems, and testing frameworks for our payments platform and developer tools, collaborating with product, design, and engineering teams to ship features that matter while improving performance,