System One is hiring: Senior React Developer in Greenwood Village

Job Title: Senior React Developer
Job Category: Software Development/ Engineering
Job Type: Contract to hire
Location: Centennial, Colorado, United States
No. Openings: 1

Description
Senior React Developer

Senior React Developer to support a client-facing digital initiative in the Denver, CO area (Centennial).

This role is located at the client site in Denver, CO area (Centennial, CO). Also, requires onsite presence Tuesday through Thursday each week.

This is a hands‑on consulting role focused on designing and delivering high-quality, scalable, and performant front‑end solutions using React and TypeScript.

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

How you'll make an impact

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

Establish and maintain scalable front-end architecture supporting long-term maintainability and growth

Develop reusable Node.js modules and shared libraries to drive cross-project consistency

Build intuitive, accessible user interfaces leveraging 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 Jest, Cypress, React Testing Library, or similar tools

Optimize build performance and bundle efficiency through modern tooling such as Webpack and related technologies

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 challenges

Contribute to technical design discussions, conduct code reviews, and mentor junior developers

Stay current with evolving front-end trends, frameworks, and best practices

Skills

Angular

Front End Development

Front-end Architecture

What you'll bring

10+ years of front-end engineering experience, including significant production experience with React

Deep proficiency in TypeScript with strong understanding of scalable typing patterns and coding standards

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 tools

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 release management practices for front-end deployments

Strong analytical and troubleshooting skills in complex client-side environments

Effective communication skills and ability to collaborate across product, design, backend engineering, and business teams

Strongly Preferred

Experience with AEM Cloud and 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

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