React Frontend Engineer - Build Scalable SPAs

Ethereum Technologies; Chicago (IL); On-site; USD 90,000 - 150,000; Full time

Job summary

Ethereum Technologies in Chicago, IL is seeking a frontend React.js developer to build responsive SPAs and reusable components. You will integrate RESTful APIs, implement authentication with JWT/OAuth, and optimize performance while collaborating with design and backend teams. Experience with testing, modern tooling (Webpack, Vite), and Git workflows is expected.

Join a diverse, Agile team committed to high-quality UI architectures and scalable frontend solutions.

Qualifications

• Proven experience building responsive web applications with React.js.
• Strong understanding of component architecture, state management, and hooks.
• Experience with RESTful APIs integration and authentication (JWT/OAuth).
• Familiarity with UI frameworks (Bootstrap, Material UI, Tailwind CSS).
• Ability to write unit tests with Jest and React Testing Library and perform code reviews.

Responsibilities

• Develop responsive and user-friendly web applications using React.js.
• Build reusable components and frontend libraries for future use.
• Develop SPAs using React.js and React Hooks.
• Integrate RESTful APIs and backend services.
• Collaborate with UI/UX designers, backend developers, and QA teams.

Skills

React.js

Frontend development

Hooks

REST APIs

UI/UX collaboration

Testing

Git

Agile/Scrum

React Router

Jest

Tools

Webpack

Vite

NPM

VS Code

Chrome DevTools

GitHub

Bitbucket

Jest

React Testing Library

Job description

Ethereum Technologies in Chicago, IL is seeking a frontend React.js developer to build responsive SPAs and reusable components. You will integrate RESTful APIs, implement authentication with JWT/OAuth, and optimize performance while collaborating with design and backend teams. Experience with testing, modern tooling (Webpack, Vite), and Git workflows is expected.

Join a diverse, Agile team committed to high-quality UI architectures and scalable frontend solutions.