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Sr React Developer Jobs in Colorado (NOW HIRING)

Horizontal Talent

Senior Optimizely CMS Developer

Broomfield, CO · Remote

$115K - $152K/yr

This Senior Optimizely Developer role is a great fit for someone who enjoys building scalable CMS ... jQuery, React, or Vue. * Deep understanding of Optimizely platform concepts such as Project JS ...

Posted today

Horizontal Talent

Senior Optimizely CMS Developer

Longmont, CO · Remote

$113K - $149K/yr

This Senior Optimizely Developer role is a great fit for someone who enjoys building scalable CMS ... jQuery, React, or Vue. * Deep understanding of Optimizely platform concepts such as Project JS ...

Posted today

Horizontal Talent

Senior Optimizely CMS Developer

Littleton, CO · Remote

$112K - $148K/yr

This Senior Optimizely Developer role is a great fit for someone who enjoys building scalable CMS ... jQuery, React, or Vue. * Deep understanding of Optimizely platform concepts such as Project JS ...

Posted today

Horizontal Talent

Senior .NET Developer Optimizely

Longmont, CO · Remote

$54 - $71.25/hr

This Senior Optimizely Developer role is a great fit for someone who enjoys building scalable CMS ... jQuery, React, or Vue. * Deep understanding of Optimizely platform concepts such as Project JS ...

Posted today

Horizontal Talent

Senior Optimizely CMS Developer

Superior, CO · Remote

$120K - $157K/yr

This Senior Optimizely Developer role is a great fit for someone who enjoys building scalable CMS ... jQuery, React, or Vue. * Deep understanding of Optimizely platform concepts such as Project JS ...

Posted today

Horizontal Talent

Senior Optimizely CMS Developer

Brighton, CO · Remote

$118K - $155K/yr

This Senior Optimizely Developer role is a great fit for someone who enjoys building scalable CMS ... jQuery, React, or Vue. * Deep understanding of Optimizely platform concepts such as Project JS ...

Posted today

Horizontal Talent

Senior CMS Developer Optimizely

Denver, CO · Remote

$116K - $152K/yr

This Senior Optimizely Developer role is a great fit for someone who enjoys building scalable CMS ... jQuery, React, or Vue. * Deep understanding of Optimizely platform concepts such as Project JS ...

Posted today

Horizontal Talent

Senior Optimizely CMS Developer

Boulder, CO · Remote

$121K - $158K/yr

This Senior Optimizely Developer role is a great fit for someone who enjoys building scalable CMS ... jQuery, React, or Vue. * Deep understanding of Optimizely platform concepts such as Project JS ...

Posted today

Horizontal Talent

Senior CMS Developer Optimizely

Longmont, CO · Remote

$113K - $149K/yr

This Senior Optimizely Developer role is a great fit for someone who enjoys building scalable CMS ... jQuery, React, or Vue. * Deep understanding of Optimizely platform concepts such as Project JS ...

Posted today

Horizontal Talent

Senior .NET Developer Optimizely

Superior, CO · Remote

$57 - $75.25/hr

This Senior Optimizely Developer role is a great fit for someone who enjoys building scalable CMS ... jQuery, React, or Vue. * Deep understanding of Optimizely platform concepts such as Project JS ...

Posted today

Horizontal Talent

Senior Optimizely CMS Developer

Denver, CO · Remote

$116K - $152K/yr

This Senior Optimizely Developer role is a great fit for someone who enjoys building scalable CMS ... jQuery, React, or Vue. * Deep understanding of Optimizely platform concepts such as Project JS ...

Posted today

Horizontal Talent

Senior CMS Developer Optimizely

Brighton, CO · Remote

$118K - $155K/yr

This Senior Optimizely Developer role is a great fit for someone who enjoys building scalable CMS ... jQuery, React, or Vue. * Deep understanding of Optimizely platform concepts such as Project JS ...

Posted today

Horizontal Talent

Senior Optimizely CMS Developer

Centennial, CO · Remote

$115K - $151K/yr

This Senior Optimizely Developer role is a great fit for someone who enjoys building scalable CMS ... jQuery, React, or Vue. * Deep understanding of Optimizely platform concepts such as Project JS ...

Posted today

Horizontal Talent

Senior Optimizely CMS Developer

Thornton, CO · Remote

$118K - $155K/yr

This Senior Optimizely Developer role is a great fit for someone who enjoys building scalable CMS ... jQuery, React, or Vue. * Deep understanding of Optimizely platform concepts such as Project JS ...

Posted today

Horizontal Talent

Senior CMS Developer Optimizely

Centennial, CO · Remote

$115K - $151K/yr

This Senior Optimizely Developer role is a great fit for someone who enjoys building scalable CMS ... jQuery, React, or Vue. * Deep understanding of Optimizely platform concepts such as Project JS ...

Posted today

Horizontal Talent

Senior Optimizely CMS Developer

Lakewood, CO · Remote

$114K - $150K/yr

This Senior Optimizely Developer role is a great fit for someone who enjoys building scalable CMS ... jQuery, React, or Vue. * Deep understanding of Optimizely platform concepts such as Project JS ...

Posted today

Horizontal Talent

Senior CMS Developer Optimizely

Boulder, CO · Remote

$121K - $158K/yr

This Senior Optimizely Developer role is a great fit for someone who enjoys building scalable CMS ... jQuery, React, or Vue. * Deep understanding of Optimizely platform concepts such as Project JS ...

Posted today

Horizontal Talent

Senior Optimizely CMS Developer

Erie, CO · Remote

$121K - $159K/yr

This Senior Optimizely Developer role is a great fit for someone who enjoys building scalable CMS ... jQuery, React, or Vue. * Deep understanding of Optimizely platform concepts such as Project JS ...

Posted today

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Showing results 41-60

All JobsSr React Developer JobsSr React Developer Jobs in Colorado

Sr React Developer information

See Colorado salary details

$16

$64

$92

How much do sr react developer jobs pay per hour?

As of Aug 12, 2026, the average hourly pay for sr react developer in Colorado is $64.91, according to ZipRecruiter salary data. Most workers in this role earn between $55.10 and $72.79 per hour, depending on experience, location, and employer.

What is a Sr React developer?

Sr React Developers are experienced software engineers who specialize in building user interfaces using the React JavaScript library. They are responsible for designing, developing, and maintaining scalable and efficient web applications, often leading projects and mentoring junior developers. In addition to deep knowledge of React, they are skilled in JavaScript, front-end frameworks, state management libraries, and best practices for performance and security. Sr React Developers often collaborate with cross-functional teams to deliver high-quality products and ensure seamless user experiences.

How does a Sr React developer typically collaborate with designers and backend engineers on projects?

As a Sr React Developer, you’ll regularly work with UI/UX designers to translate wireframes and visual concepts into functional, interactive web applications. Collaboration with backend engineers is also essential, as you’ll integrate APIs and ensure that frontend components communicate efficiently with server-side logic. Effective communication and a proactive approach to problem-solving are key, as you’ll often participate in code reviews, sprint planning, and cross-functional meetings to align on project goals and resolve technical challenges.

What is the difference between Sr React Developer vs React Developer?

AspectSr React DeveloperReact Developer
Required Experience5+ years, leadership skills1-3 years, foundational skills
ResponsibilitiesArchitecting solutions, mentoring, complex problem-solvingImplementing UI components, basic feature development
CertificationsRelevant certifications preferredBasic certifications or self-taught
Work EnvironmentCross-functional teams, project leadershipDevelopment teams, coding tasks

The main difference between a Sr React Developer and a React Developer lies in experience, responsibilities, and leadership. Sr React Developers typically have more years of experience, handle complex projects, and mentor junior developers, whereas React Developers focus on implementing features and gaining foundational skills.

What are the key skills and qualifications needed to thrive as a Sr React developer?

To thrive as a Sr React Developer, you need advanced proficiency in JavaScript, React.js, and front-end development principles, supported by a degree in computer science or equivalent experience. Mastery of tools like Redux, TypeScript, RESTful APIs, and familiarity with build systems such as Webpack, as well as experience with unit testing frameworks, is typically required. Strong problem-solving skills, effective communication, and the ability to mentor junior developers are vital soft skills for this role. These abilities are crucial for building scalable, maintainable applications and leading high-performing development teams in dynamic environments.
What are popular job titles related to Sr React Developer jobs in Colorado? For Sr React Developer jobs in Colorado, the most frequently searched job titles are:
What job categories do people searching Sr React Developer jobs in Colorado look for? The top searched job categories for Sr React Developer jobs in Colorado are:
What cities in Colorado are hiring for Sr React Developer jobs? Cities in Colorado with the most Sr React Developer job openings:
Sr React Developer jobs near you
Infographic showing various Sr React Developer job openings in Colorado as of August 2026, with employment types broken down into 1% As Needed, 89% Full Time, 6% Part Time, and 4% Contract. Highlights an 84% Physical, 6% Hybrid, and 10% Remote job distribution, with an average salary of $135,015 per year, or $64.9 per hour.

Senior Optimizely CMS Developer

Horizontal Talent

Broomfield, CO • Remote

$115K - $152K/yr

Full-time

Posted 21 hours ago

Posted today

Job description

Join a fast-moving digital marketing team that is investing heavily in modern web technology, experimentation, and data-driven growth. This Senior Optimizely Developer role is a great fit for someone who enjoys building scalable CMS solutions, launching sophisticated experiments, and using AI-assisted tools to work faster and smarter.

Responsibilities
  • Build and maintain reusable components, page templates, and content models within Optimizely CMS to help marketing teams launch web pages efficiently.
  • Design CMS architecture that supports scalability, security, and strong performance, including Core Web Vitals optimization.
  • Develop and support integrations between Optimizely CMS and enterprise platforms such as Salesforce, Marketo, Adobe Commerce, and internal systems.
  • Create and deploy advanced A/B, split, and multivariate tests in Optimizely Web Experimentation, including custom DOM manipulation and dynamic content changes.
  • Implement personalized web experiences for targeted B2B audiences and account-based marketing campaigns.
  • Partner on server-side testing and feature flagging when frontend testing is not the best fit.
  • Perform thorough cross-browser and cross-device testing to help ensure smooth, consistent user experiences with minimal flicker or layout shift.
  • Define and document best practices, technical standards, and governance guidelines for Optimizely-related work.
  • Collaborate closely with CRO, product, and design teams to evaluate ideas, prototype solutions, and translate designs into polished digital experiences.
  • Use AI-assisted development tools to accelerate coding, debugging, testing, and experimentation workflows.
Skills
  • 5+ years of full-stack web development experience.
  • At least 3+ years of hands-on experience working within the Optimizely ecosystem.
  • Strong backend development skills with C# and .NET Core/MVC, especially in Optimizely CMS environments.
  • Advanced frontend experience with HTML5, CSS3/SASS, and JavaScript, including Vanilla JS, ES6+, jQuery, React, or Vue.
  • Deep understanding of Optimizely platform concepts such as Project JS, visual tags, audience targeting, anti-flicker approaches, and caching behavior.
  • Experience building for complex B2B websites, including lead generation and gated content workflows.
  • Strong Git knowledge and familiarity with modern CI/CD workflows such as Azure DevOps or GitHub Actions.
  • Ability to work independently while also partnering effectively with cross-functional teams.
  • A proactive, solution-oriented mindset with a focus on speed, quality, and continuous improvement.
Preferred Skills
  • Active Optimizely Developer certification in CMS or Web Experimentation.
  • Experience supporting server-side experimentation and feature flagging initiatives.
  • Familiarity with UX/UI collaboration and translating wireframes or Figma designs into interactive experiences.
  • Comfort using AI tools such as GitHub Copilot or ChatGPT to support development efficiency.
  • Experience working in remote-first environments and collaborating across multiple locations.

Horizontal is committed to fostering an inclusive environment where all qualified candidates can thrive. We value diversity, equity, and inclusion as essential to building strong teams, better ideas, and better outcomes.

By applying for this position, you acknowledge and agree that Horizontal Talent may contact you regarding your application using automated technology, including phone calls, SMS/text messages, or email, which may be delivered by our virtual AI recruiter, Alex.

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