Senior Frontend Engineer - Web3 Apps & SDKs

Circle; Austin (TX); On-site; USD 153,000 - 205,000; Full time

Job summary

Circle is building the foundation of a more open, global economy through digital assets, payment applications, and blockchain infrastructure. We seek a frontend engineer to create Web3 consumer apps, web SDKs, and developer tools, collaborating across Product, Design, and Engineering to deliver scalable, accessible interfaces for developers and end users.

You will work on internal tools for Customer Success and contribute to a healthy frontend ecosystem with code reviews and automated testing.

Qualifications

• 4+ years building user interfaces for complex web apps.
• Proficient in HTML, CSS, TS, and JavaScript.
• Experience with React and building responsive, component-based apps.
• Experience using AI-assisted development tools such as Claude, Codex, Cursor.
• Experience writing well-tested, maintainable code and contributing to coding standards.
• Strong product judgment and usability focus.
• Experience collaborating with product managers, designers, and distributed teams.
• Excellent written and verbal communication skills.

Responsibilities

• Build world-class Web3 consumer apps, web SDKs, and developer tools.
• Create internal tools for Customer Success teams to assist support.
• Collaborate with Product, Design, and Engineering to translate requirements into features.
• Participate in code reviews and promote engineering best practices.
• Build reusable frontend components for cross-product use.
• Write and maintain high-quality, testable code.

Skills

UI development

HTML/CSS/JS/TS

React

AI-assisted tools

Code quality

Product judgment

Collaboration

Communication

Tools

Claude

Codex

Cursor

Job description

Circle is building the foundation of a more open, global economy through digital assets, payment applications, and blockchain infrastructure. We seek a frontend engineer to create Web3 consumer apps, web SDKs, and developer tools, collaborating across Product, Design, and Engineering to deliver scalable, accessible interfaces for developers and end users.

You will work on internal tools for Customer Success and contribute to a healthy frontend ecosystem with code reviews and automated testing.