Senior Frontend Engineer, Web3 & AI-Driven UI

Circle; Seattle (WA); On-site; USD 153,000 - 205,000; Full time

Job summary

Circle is seeking a frontend engineer to build world-class Web3 consumer applications, web SDKs, and developer tools. You will work closely with Product, Design, and Engineering to translate requirements into reliable, scalable experiences for developers and end users.

You will collaborate across teams to deliver high-quality features, maintain code quality, and participate in reviews. A strong emphasis on testing, CI/CD, and AI-assisted development is expected.

Qualifications

• 4+ years of experience building user interfaces for complex web applications.
• Proficiency in HTML, CSS, TypeScript, and JavaScript.
• Experience building responsive, component-based applications with React.
• Experience using AI-assisted development tools such as Claude, Codex, Cursor, or similar platforms.
• Experience writing well-tested, maintainable code and contributing to strong coding standards.
• Strong product judgment and ability to improve usability and quality.
• Experience collaborating with product managers, designers, and distributed engineering teams.
• Excellent written and verbal communication skills.

Responsibilities

• Build and maintain responsive Web3 applications using modern frontend technologies.
• Develop web SDKs and tools that simplify integration with Circle products and services.
• Design reusable, accessible, and scalable frontend components for shared use across products.
• Partner with Product and Design to translate user needs into intuitive, high-quality features.
• Build internal tools that help Customer Success teams resolve customer needs efficiently.
• Participate in code and design reviews to improve quality, consistency, and maintainability.
• Use automated testing, continuous delivery practices, and AI-assisted development tools to improve engineering velocity.

Skills

Frontend development

HTML/CSS/TypeScript/JavaScript

React

AI-assisted development tools

Code quality & testing

Cross-functional collaboration

Strong communication

Tools

Node.js

SDKs & Web3 products

Blockchain tech

Job description

Circle is seeking a frontend engineer to build world-class Web3 consumer applications, web SDKs, and developer tools. You will work closely with Product, Design, and Engineering to translate requirements into reliable, scalable experiences for developers and end users.

You will collaborate across teams to deliver high-quality features, maintain code quality, and participate in reviews. A strong emphasis on testing, CI/CD, and AI-assisted development is expected.