Senior Frontend Engineer, Web3 & SDKs (AI-Assisted)

Circle; Chicago (IL); On-site; USD 153,000 - 205,000; Full time

Job summary

Circle is seeking a talented frontend engineer to build world-class Web3 consumer applications and SDKs. You will work with React, HTML/CSS/TS/JS to deliver responsive, accessible interfaces and reusable components across Circle products.

You will collaborate with product, design, and engineering to translate user needs into reliable, scalable experiences for developers and end users, while embracing automated testing and CI/CD and AI-assisted tooling to boost velocity.

Qualifications

• 4+ years of experience building user interfaces for complex web applications.
• Strong 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 the ability to identify opportunities 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 UI development

React

HTML/CSS/TypeScript/JavaScript

AI-assisted development tools

Testing & quality

Cross-functional collaboration

Communication

Tools

Node.js

Web SDKs

SDKs

AI tools: Claude/Codex/Cursor

Web3/Blockchain tech

Job description

Circle is seeking a talented frontend engineer to build world-class Web3 consumer applications and SDKs. You will work with React, HTML/CSS/TS/JS to deliver responsive, accessible interfaces and reusable components across Circle products.

You will collaborate with product, design, and engineering to translate user needs into reliable, scalable experiences for developers and end users, while embracing automated testing and CI/CD and AI-assisted tooling to boost velocity.