UI React developer

Ethereum Technologies; Chicago (IL); On-site; USD 150,000 - 210,000; Full time

Job summary

Ethereum Technologies is seeking an senior front-end engineer in Chicago to design, develop, and maintain enterprise-scale web applications using React.js. You will lead front-end architecture, build scalable UI components, and collaborate with product, UX, and backend teams.

You will ensure cross-browser compatibility, accessibility, and high performance while contributing to CI/CD, testing, and deployment processes. Strong communication and problem-solving skills are essential.

Qualifications

• Minimum 8+ years in front-end development.
• 5+ years with React.js.
• Strong expertise in JavaScript (ES6+), TypeScript, HTML5, and CSS3.
• Experience with Redux, Context API, and state management.
• Experience with REST APIs and Git.

Responsibilities

• Design, develop, and maintain enterprise-scale web applications using React.js.
• Lead front-end technical design and architecture discussions.
• Build reusable, scalable, and responsive UI components.
• Collaborate with product owners, UX designers, architects, and backend teams.
• Integrate RESTful APIs and third-party services.
• Optimize performance, accessibility, and user experience.
• Conduct code reviews and promote front-end best practices.
• Troubleshoot and resolve complex UI issues.
• Contribute to CI/CD, testing, and deployment processes.

Skills

Front-end development

React.js

JavaScript/TypeScript/HTML5/CSS3

REST APIs/Git/Agile

Responsive design

Tools

Redux

Context API

Jest

React Testing Library

Cypress

Git

Job description

US Citizen, Green Card, H-1B, OPT-EAD, CPT, Other

Key Responsibilities:

• Design, develop, and maintain enterprise-scale web applications using React.js.
• Lead front-end technical design and architecture discussions.
• Build reusable, scalable, and responsive UI components.
• Collaborate with product owners, UX designers, architects, and backend teams.
• Integrate RESTful APIs and third-party services.
• Optimize application performance, accessibility, and user experience.
• Conduct code reviews and promote front-end best practices.
• Troubleshoot and resolve complex UI and application issues.
• Contribute to CI/CD, testing, and deployment processes.

Required Skills:

• 8+ years of front-end development experience.
• 5+ years of hands-on experience with React.js.
• Strong expertise in JavaScript (ES6+), TypeScript, HTML5, and CSS3.
• Experience with Redux, Context API, and state management frameworks.
• Solid understanding of responsive web design and cross-browser compatibility.
• Experience with REST APIs, Git, and Agile development methodologies.
• Strong problem-solving and communication skills.

Preferred Skills:

• Experience in Retail or eCommerce environments.
• Exposure to cloud platforms such as GCP, AWS, or Azure (not mandatory).
• Experience with Micro Frontend architecture.
• Familiarity with Jest, React Testing Library, or Cypress.

We are an equal opportunity employer. All aspects of employment including the decision to hire, promote, discipline, or discharge, will be based on merit, competence, performance, and business needs. We do not discriminate on the basis of race, color, religion, marital status, age, national origin, ancestry, physical or mental disability, medical condition, pregnancy, genetic information, gender, sexual orientation, gender identity or expression, national origin, citizenship/ immigration status, veteran status, or any other status protected under federal, state, or local law.