Frontend Developer – React/Angular UI Engineer

Quantum Technologies. LLC; Chicago (IL); On-site; USD 90,000 - 130,000; Full time

Job summary

Quantum Technologies. LLC is seeking a frontend engineer to develop reusable UI components and frontend modules using React.js and Angular.

You will translate UI/UX designs into high-quality, responsive web interfaces and build SPAs that connect to backend services via RESTful APIs. Responsibilities include managing state with Redux and Context API, implementing responsive designs across devices, and collaborating with UI/UX designers and developers.

Qualifications

• Proficient with frontend frameworks (React/Angular) and TypeScript.
• Experience building SPAs and integrating with RESTful services.
• Solid CSS framework knowledge and responsive design principles.

Responsibilities

• Developed reusable UI components and frontend modules using React.js, Angular, and TypeScript.
• Implemented interactive web pages and dynamic user interfaces to enhance user experience and application performance.
• Translated UI/UX designs and wireframes into high-quality, responsive web interfaces.
• Developed single-page applications (SPAs) using React.js and Angular.
• Integrated frontend applications with backend services using RESTful APIs and JSON.
• Managed application state using Redux, Context API, and other state management libraries.
• Implemented responsive web designs to ensure compatibility across desktops, tablets, and mobile devices.
• Used CSS frameworks such as Bootstrap, Material UI, and Tailwind CSS to build consistent user interfaces.
• Optimized frontend performance by reducing page load times, minimizing bundle sizes, and implementing lazy loading.
• Implemented form validations, error handling, authentication, and authorization mechanisms.
• Collaborated with UI/UX designers and backend developers to deliver seamless application functionality.
• Used Git and GitHub for version control, branching strategies, and collaborative development.
• Participated in code reviews, unit testing, integration testing, and defect resolution.
• Worked with Jest, React Testing Library, and Jasmine for frontend application testing.
• Followed Agile/Scrum methodologies and participated in sprint planning, daily stand-ups, and project reviews.
• Supported application deployment and maintenance across development, testing, and production environments.

Skills

React.js

Angular

TypeScript

Redux

Context API

RESTful APIs

JSON

Bootstrap

Material UI

Tailwind CSS

Git

GitHub

Jest

React Testing Library

Jasmine

Tools

RESTful APIs

JSON

Bootstrap

Material UI

Tailwind CSS

Git

GitHub

Jest

React Testing Library

Jasmine

Job description

Quantum Technologies. LLC is seeking a frontend engineer to develop reusable UI components and frontend modules using React.js and Angular.

You will translate UI/UX designs into high-quality, responsive web interfaces and build SPAs that connect to backend services via RESTful APIs. Responsibilities include managing state with Redux and Context API, implementing responsive designs across devices, and collaborating with UI/UX designers and developers.