UI Engineer (React JS)

Quantum Technologies. LLC; Plano (TX); On-site; USD 120,000 - 150,000; Full time

Job summary

Quantum Technologies LLC in Plano, TX is seeking a senior front-end engineer to build reusable, scalable React components and implement React Hooks with Redux/Context. You will integrate RESTful APIs and GraphQL services, optimize performance, and maintain strong test coverage.

Collaborating with designers, backend engineers, and product managers, you will deliver high-quality UI, debug issues, and stay current with React updates and tooling like Webpack and Enzyme.

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 other front-end build/testing tools.
• Familiarity with REST APIs, GraphQL, and third-party service integration.
• Awareness of front-end security practices (CSP, XSS prevention, etc.).
• 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 (Redux / Context API), and component lifecycle methods.
• Integrate and consume RESTful APIs and GraphQL services.
• Use React ecosystem tools such as Webpack, Enzyme, Redux, and Flux.
• Work on application 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

React.js

React Hooks

Redux

Flux

Component-based architecture

REST APIs

GraphQL

Webpack

Enzyme

Security practices

Unit tests

Testing Library

Communication skills

Tools

Webpack

Enzyme

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.

QUANTUM 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. QUANTUM 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 QUANTUM 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