UI React developer

Quantum Technologies. LLC; Chicago (IL); On-site; USD 130,000 - 170,000; Full time

Job summary

Quantum Technologies LLC is seeking a senior front-end engineer to design, develop, and maintain enterprise-scale web applications using React.js. You will lead front-end technical design and architecture discussions and collaborate with product owners, UX designers, architects, and backend teams.

The ideal candidate has 8+ years of front-end experience, 5+ years with React.js, and deep expertise in JavaScript, TypeScript, HTML5, and CSS3.

Qualifications

• 8+ years of front-end development experience.
• 5+ years with React.js (hands-on).
• Strong expertise in JavaScript, TypeScript, HTML5, and CSS3.
• Experience with Redux and Context API.
• REST APIs, Git, and Agile methodologies.
• Strong problem-solving and communication.

Responsibilities

• Design, develop, and maintain enterprise-scale web applications using React.js.
• Lead front-end technical design and architecture discussions.
• Build reusable, scalable 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 experience

React.js

JavaScript

TypeScript

HTML5

CSS3

Redux

Context API

State management

REST APIs

Git

Agile

Problem-solving

Communication

Job description

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.