UI Engineer (React JS)

Ethereum Technologies LLC; Austin (TX); On-site; USD 120,000 - 160,000; Full time

Job summary

ETHEREUM TECHNOLOGIES LLC in Austin, TX is seeking a senior UI/Front-End Developer to build scalable React applications, deliver reusable components, and collaborate with designers and backend engineers to ship high‑quality UI.

You will implement React Hooks, manage state with Redux/Context, integrate REST/GraphQL services, optimize performance, and enforce security and testing standards with Jest and modern tooling.

Qualifications

• 8–10 years of hands-on experience in UI / Front-End Development.
• Advanced experience with React.js, React Hooks, Redux, Flux, and component-based architecture.
• Experience with Webpack, Enzyme, and front-end build/testing tools.
• Familiarity with REST APIs, GraphQL, and third-party service integration.
• Awareness of front-end security practices (CSP, XSS prevention).
• Hands-on experience writing unit tests and maintaining high test coverage.
• Excellent problem-solving, communication, and collaboration skills.

Responsibilities

• Build reusable, scalable React components following best practices.
• Implement React Hooks, state management, and lifecycle methods.
• Integrate RESTful APIs and GraphQL services.
• Use Webpack, Enzyme, Redux, and Flux in the workflow.
• Work on performance tuning, code splitting, and rendering optimizations.
• Follow front-end security best practices to ensure secure UI development.
• Develop and maintain unit tests using Jest, React Testing Library, or similar frameworks.
• Collaborate closely with designers, backend engineers, and product managers to deliver high-quality UI.
• Debug, troubleshoot, and resolve UI/UX issues across the application.
• Stay updated with the latest React updates, patterns, and industry best practices.
• Work with version control tools like Git/GitHub for code management.

Skills

UI / Front-End Development

React.js

React Hooks

Redux

Flux

REST APIs

GraphQL

Webpack

Enzyme

Unit tests

Jest

Git / GitHub

Tools

Webpack

Enzyme

Redux

Flux

Git/GitHub

Job description

Responsibilities

• Buildreusable, scalable React componentsfollowing best practices.
• ImplementReact Hooks, state management (Redux / Context API), and component lifecycle methods.
• Integrate and consumeRESTful APIsandGraphQLservices.
• Use React ecosystem tools such asWebpack, Enzyme, Redux, and Flux.
• Work on applicationperformance tuning, code splitting, and rendering optimizations.
• Followfront-end security best practicesto ensure secure UI development.
• Develop and maintainunit testsusing Jest, React Testing Library, or similar frameworks.
• Collaborate closely with designers, backend engineers, and product managers to deliver high-quality UI .
• Debug, troubleshoot, and resolve UI /UX issues across the application.
• Stay updated with the latestReact updates, patterns, and industry best practices.
• Work with version control tools likeGit/GitHubfor code management.

Required Skills & Experience

• 8–10 years of hands-on experience in UI / Front-End Development.
• Advanced experience working withReact.js, React Hooks, Redux, Flux, and component-based architecture.
• Experience withWebpack, Enzyme, and other front-end build/testing tools.
• Familiarity withREST APIs, GraphQL, and third-party service integration.
• Awareness offront-end security practices(CSP, XSS prevention, etc.).
• Hands-on experience writingunit testsand maintaining high test coverage.
• Excellent problem-solving, communication, and collaboration skills.

ETHEREUM TECHNOLOGIES LLC is an equal opportunity employer inclusive of female, minority, disability and veterans, (M/F/D/V). Hiring, promotion, transfer, compensation, benefits, discipline, termination and all other employment decisions are made without regard to race, color, religion, sex, sexual orientation, gender identity, age, disability, national origin, citizenship/immigration status, veteran status or any other protected status. ETHEREUM TECHNOLOGIES LLC will not make any posting or employment decision that does not comply with applicable laws relating to labor and employment, equal opportunity, employment eligibility requirements or related matters. Nor will ETHEREUM TECHNOLOGIES LLC require in a posting or otherwise U.S. citizenship or lawful permanent residency in the U.S. as a condition of employment except as necessary to comply with law, regulation, executive order, or federal, state, or local government contract