Senior React Developer​/Architect

Senior React Developer/Architect

CGI is seeking a highly skilled Senior React Developer / Architect to join our CGI Team! Support a client-facing digital initiative in the Denver, CO (Centennial) area. This is a hands-on consulting role focused on designing and delivering high-quality, scalable, and high-performance front-end solutions using React and Type Script. This position is based at the client site (Centennial, CO) and requires onsite presence Tuesday through Thursday each week.

The ideal candidate brings deep front-end engineering expertise, strong architectural judgment, and the ability to collaborate closely with UX designers, backend engineers, and cross-functional stakeholders to deliver enterprise-grade digital applications.

Your future duties and responsibilities:
Design and implement modular, high-quality front-end features using React and Type Script. Define and maintain scalable front-end architecture to support long-term maintainability and growth. Develop reusable Node.js modules and shared libraries to promote cross-project consistency. Build intuitive, accessible user interfaces using Material UI or comparable design systems. Integrate applications with RESTful and/or GraphQL APIs, optimizing data access and state management. Implement comprehensive UI testing strategies using tools such as Jest, Cypress, and React Testing Library.

Optimize build performance and bundle efficiency using modern tooling (e.g., Webpack). Ensure solutions meet enterprise standards for performance, accessibility, and security. Partner with backend engineers to define API contracts and improve data-fetching strategies. Troubleshoot complex UI, caching, and state management issues. Contribute to technical design discussions, conduct code reviews, and mentor junior developers. Stay current with emerging front-end trends, frameworks, and best practices.

Required qualifications to be successful in this role: 10+ years of front-end engineering experience, including significant production experience with React. Deep proficiency in Type Script, with a strong understanding of scalable typing patterns and coding standards. Professional experience with Express.js and Next.js. Experience with AEM or Sitecore. Experience implementing enterprise UI design systems such as Material UI or similar frameworks. Working knowledge of Node.js,

including development of shared packages or internal libraries. Hands-on experience implementing automated front-end testing strategies. Strong understanding of modern build tooling, module bundling, tree shaking, and performance optimization techniques. Experience with state management libraries such as Redux, Zustand, Recoil, or similar. Proven ability to improve application performance through lazy loading, code splitting, and bundle optimization. Experience integrating RESTful services and/or GraphQL APIs with efficient data handling strategies.

Familiarity with CI/CD pipelines and front-end release management practices. Strong analytical and troubleshooting skills in complex client-side environments. Excellent communication skills and ability to collaborate across product, design, engineering, and business teams.