Senior React Developer/Architect

CGI•Centennial, CO

1d•$98,500 - $172,400•Onsite

About The Position

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 TypeScript. 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.

Requirements

10+ years of front-end engineering experience, including significant production experience with React
Deep proficiency in TypeScript, 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

Nice To Haves

Experience with SPA Editor
Familiarity with server-side rendering frameworks such as Next.js
Experience working within micro-frontend or modular front-end architectures
Knowledge of accessibility standards (WCAG) and advanced front-end performance optimization techniques
Prior consulting or client-facing experience

Responsibilities

Design and implement modular, high-quality front-end features using React and TypeScript
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