Frontend Developer – React.js

Detroit Area, Michigan Hybrid permanent

Posted: November 12, 2025

Job Description

Concept Reply, part of the Reply Network, is a leader in IoT solutions. We support and advise our customers in Automotive, Manufacturing, Smart Infrastructure, and beyond in all aspects of Internet of Things (IoT) and Cloud Computing. From designing and developing customized IoT solutions to implementing and managing them seamlessly, Concept Reply helps customers unlock the potential of IoT.

As a Frontend Developer, you will be responsible for designing, developing, and maintaining high-quality user interfaces using React.js, JavaScript/TypeScript, HTML, and CSS. You will work closely with backend and QA teams to ensure seamless integration and optimal performance across systems. You will also support debugging, testing, and improving frontend-to-backend communication and authentication flows.

Responsibilities:
• Develop and maintain responsive web applications using React.js, JavaScript/TypeScript, HTML, and CSS
• Integrate and debug RESTful API calls using browser developer and network tools
• Implement authentication and authorization flows using Keycloak or equivalent OAuth2/OpenID Connect systems
• Collaborate with backend and QA teams to ensure stable and secure frontend-to-backend integration
• Use GitHub for code reviews, version control, and issue tracking
• Debug and optimize frontend performance using browser developer tools

Minimum Requirements:
• US Citizen or Green Card holder required
• 2 years of hands-on experience with React.js, JavaScript/TypeScript, HTML, and CSS
• 2 years of experience working with RESTful APIs, including testing and debugging
• Experience with Keycloak for authentication and authorization
• Proficiency with GitHub for version control and collaboration
• Strong ability to use browser developer tools for debugging and troubleshooting
• Familiarity with Visual Studio Code or similar IDEs

Preferred Qualifications:
• Experience with Three.js or similar 3D visualization frameworks for interactive graphics and map rendering
• Understanding of secure session management and token-based authentication flows
• Knowledge of best practices for frontend architecture and component reusability

About Reply
Reply specializes in the design and implementation of solutions based on new communication channels and digital media. Reply is a network of highly specialized companies supporting global industrial groups operating in the telecom and media, industry and services, banking, insurance and public administration sectors in the definition and development of business models enabled for the new paradigms of AI, cloud computing, digital media and the Internet of Things. Reply services include Consulting, System Integration and Digital Services.

Reply is an equal opportunity employer. We are committed to provide equal opportunity regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability, gender identity or Veteran status. If you need assistance and reasonable accommodation due to a disability during the application or the recruiting process, email us at [email protected]. Visit our website at www.reply.com to learn more about our open roles.

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