React Frontend Engineer: Build Fast, Reusable UIs

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

Job summary

Quantum Technologies. LLC in Chicago is seeking a frontend developer to build responsive, React-based web applications. You will create reusable components, develop SPAs, and implement UI with modern frameworks such as Bootstrap, Material UI, and Tailwind.

Collaboration with designers, backend teams, and QA is essential to deliver high-quality software. You will work with React Hooks, authentication (JWT/OAuth), and testing with Jest.

Qualifications

• Experience building web apps with React.js and modern frontend stacks.
• Strong understanding of HTML5, CSS3 and responsive design.
• Familiarity with RESTful APIs and async data handling.
• Experience with Git and Agile/Scrum.
• Testing with Jest and React Testing Library.
• Ability to collaborate with UI/UX designers and backend teams.

Responsibilities

• Develop responsive and user-friendly web applications using React.js.
• Build reusable components and frontend libraries for future use.
• Develop single-page applications (SPAs) using React.js.
• Work with React Hooks such as useState, useEffect, useContext, and useMemo.
• Integrate RESTful APIs and backend services.
• Develop responsive UI layouts using HTML5, CSS3, Bootstrap, and Material UI.
• Optimize application performance and improve page loading speed.
• Debug and resolve UI and application-related issues.
• Collaborate with UI/UX designers, backend developers, and QA teams.
• Participate in code reviews and follow coding standards.
• Implement authentication and authorization using JWT and OAuth.
• Write unit tests using Jest and React Testing Library.
• Use Git for version control and collaborate through Agile/Scrum methodologies.
• React Concepts: Components, Props, State, Hooks, Lifecycle Methods.
• UI Frameworks: Bootstrap, Material UI, Tailwind CSS.
• Routing: React Router.
• Testing: Jest, React Testing Library.
• Build Tools: Webpack, Vite, npm.
• Version Control: Git, GitHub, Bitbucket.
• Development Tools: VS Code, Chrome DevTools.

Job description

Quantum Technologies. LLC in Chicago is seeking a frontend developer to build responsive, React-based web applications. You will create reusable components, develop SPAs, and implement UI with modern frameworks such as Bootstrap, Material UI, and Tailwind.

Collaboration with designers, backend teams, and QA is essential to deliver high-quality software. You will work with React Hooks, authentication (JWT/OAuth), and testing with Jest.