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KellyMitchell Group

UI Developer

On site

Greenwood village, United states

$ 122,700 /year

Freelance

05-02-2026

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Skills

JavaScript TypeScript CSS GitLab CI/CD Customer Service git Organization react node.js Agile Redux Material UI Nginx CI/CD Pipelines

Job Specifications

Job Summary:

Our client is seeking a UI Developer to join their team! This position is located in Greenwood Village, Colorado.

Duties:

Build and maintain front-end applications using React, TypeScript, and JavaScript
Design and implement reusable UI components with Material UI (MUI) or similar libraries
Manage application state using React Context, Redux, or related state management tools
Integrate front-end applications with RESTful APIs and backend services
Implement authentication and authorization using OAuth2 / OpenID Connect
Write clean, maintainable code and create unit tests for React applications
Configure, build, and package applications using Webpack
Troubleshoot and support CI/CD pipelines (GitLab or similar)
Deploy and support applications using Node.js or NGINX
Participate in Agile development and contribute to iterative releases

Desired Skills/Experience:

Strong proficiency in JavaScript (ES6+) and TypeScript
Hands-on experience building applications with React and React Router
Experience with state management libraries such as React Context and Redux
Strong UI development skills using Material UI (MUI) or similar UI/CSS frameworks
Solid understanding of RESTful APIs, including integration and best practices
Experience writing and maintaining unit tests for React applications
Working knowledge of CORS and browser security concepts
Experience with OAuth2 / OpenID Connect for authentication and authorization
Proficiency with Git and source control workflows
Experience with Webpack and front-end build tools
Ability to run and troubleshoot CI/CD pipelines (GitLab or similar)
Experience deploying and supporting applications using Node.js or NGINX
Familiarity with Agile development practices

Benefits:

Medical, Dental, & Vision Insurance Plans
Employee-Owned Profit Sharing (ESOP)
401K offered

The approximate pay range for this position starting at $104,000-$122,700. Please note that the pay range provided is a good faith estimate. Final compensation may vary based on factors including but not limited to background, knowledge, skills, and location. We comply with local wage minimums.

At KellyMitchell, our culture is world class. We’re movers and shakers! We don’t mind a bit of friendly competition, and we reward hard work with unlimited potential for growth. This is an exciting opportunity to join a company known for innovative solutions and unsurpassed customer service. We're passionate about helping companies solve their biggest IT staffing & project solutions challenges. As an employee-owned, women-led organization serving Fortune 500 companies nationwide, we deliver expert service at a moment's notice.

By applying for this job, you agree to receive calls, AI-generated calls, text messages, or emails from KellyMitchell and its affiliates, and contracted partners. Frequency varies for text messages. Message and data rates may apply. Carriers are not liable for delayed or undelivered messages. You can reply STOP to cancel and HELP for help. You can access our privacy policy at https://www.careers.kellymitchell.com/privacy-policy

About the Company

Connecting People with Opportunities + Clients with Success.(r) We're KellyMitchell, a leading IT Staffing & Project Solutions partner -- providing adaptive, scalable solutions focused on the top tech needs of the world's leading organizations. Technology Solutions That Work for You We are dedicated to delivering technology solutions expertise -- helping professionals achieve career excellence and companies achieve innovation goals. As an employee-owned, women-led organization, we have a strong commitment to fostering a ... Know more