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Junior Frontend Developer React Jobs in Colorado

Horizontal Talent

Senior Optimizely CMS Developer

Welby, CO · Remote

$118K - $155K/yr

Partner on server-side testing and feature flagging when frontend testing is not the best fit ... jQuery, React, or Vue. * Deep understanding of Optimizely platform concepts such as Project JS ...

New

Horizontal Talent

Senior CMS Developer Optimizely

Arvada, CO · Remote

$116K - $153K/yr

Partner on server-side testing and feature flagging when frontend testing is not the best fit ... jQuery, React, or Vue. * Deep understanding of Optimizely platform concepts such as Project JS ...

New

Horizontal Talent

Senior Optimizely CMS Developer

Arvada, CO · Remote

$116K - $153K/yr

Partner on server-side testing and feature flagging when frontend testing is not the best fit ... jQuery, React, or Vue. * Deep understanding of Optimizely platform concepts such as Project JS ...

New

Horizontal Talent

Senior CMS Developer Optimizely

Aurora, CO · Remote

$117K - $154K/yr

Partner on server-side testing and feature flagging when frontend testing is not the best fit ... jQuery, React, or Vue. * Deep understanding of Optimizely platform concepts such as Project JS ...

New

Horizontal Talent

Senior Optimizely CMS Developer

Golden, CO · Remote

$118K - $155K/yr

Partner on server-side testing and feature flagging when frontend testing is not the best fit ... jQuery, React, or Vue. * Deep understanding of Optimizely platform concepts such as Project JS ...

New

Horizontal Talent

Senior Optimizely CMS Developer

Denver, CO · Remote

$118K - $155K/yr

Partner on server-side testing and feature flagging when frontend testing is not the best fit ... jQuery, React, or Vue. * Deep understanding of Optimizely platform concepts such as Project JS ...

New

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Junior Frontend Developer React information

What is the difference between Junior Frontend Developer React vs Junior Frontend Developer Angular?

AspectJunior Frontend Developer ReactJunior Frontend Developer Angular
Required SkillsProficiency in React, JavaScript, HTML, CSSProficiency in Angular, TypeScript, HTML, CSS
Work EnvironmentOften in startups, tech companies using ReactCommon in enterprise, large-scale applications using Angular
CertificationsReact certifications, JavaScript coursesAngular certifications, TypeScript courses
Industry UsagePopular in web development projectsUsed in complex, scalable web applications

Both roles are entry-level frontend positions requiring knowledge of JavaScript frameworks. React developers focus on building flexible, component-based UIs with React, while Angular developers work with a comprehensive framework for large-scale applications. The choice depends on the company's tech stack and project requirements.

What does a junior frontend developer React do?

A Junior Frontend Developer React is responsible for building and maintaining the user interface of web applications using the React JavaScript library. They work closely with designers and backend developers to implement visual elements, ensure responsiveness, and improve user experience. As a junior developer, they typically handle basic coding tasks, bug fixes, and learn best practices under the supervision of more experienced team members.

What are the key skills and qualifications needed to thrive as a junior frontend developer React, and why are they important?

To thrive as a Junior Frontend Developer React, you need a solid understanding of HTML, CSS, JavaScript, and foundational knowledge of React.js, often supported by a relevant degree or coding bootcamp experience. Familiarity with version control systems like Git, code editors such as VS Code, and basic knowledge of RESTful APIs are typically expected. Strong problem-solving abilities, attention to detail, and effective communication skills help you collaborate and adapt in team environments. These competencies ensure you can build responsive user interfaces, integrate with backend services, and contribute effectively to dynamic development teams.

What are some common challenges faced by junior frontend developers working with React, and how can they be overcome?

Junior Frontend Developers using React often encounter challenges such as managing component state, understanding the React lifecycle, and efficiently handling props and state updates. Additionally, collaborating with backend teams and integrating APIs can require careful coordination and clear communication. To overcome these challenges, it's helpful to regularly review React documentation, participate in code reviews, and seek mentorship from more experienced developers. Embracing version control and agile workflows can also make teamwork and project management smoother.
What are popular job titles related to Junior Frontend Developer React jobs in Colorado? For Junior Frontend Developer React jobs in Colorado, the most frequently searched job titles are:
What job categories do people searching Junior Frontend Developer React jobs in Colorado look for? The top searched job categories for Junior Frontend Developer React jobs in Colorado are:
What cities in Colorado are hiring for Junior Frontend Developer React jobs? Cities in Colorado with the most Junior Frontend Developer React job openings:
Junior Frontend Developer React jobs near you
Infographic showing various Junior Frontend Developer React job openings in Colorado as of August 2026, with employment types broken down into 80% Full Time, 6% Part Time, and 14% Contract. Highlights an 80% Physical, 6% Hybrid, and 14% Remote job distribution.

Senior Optimizely CMS Developer

Horizontal Talent

Welby, CO • Remote

$118K - $155K/yr

Full-time

This job post has expired today. Applications are no longer accepted.

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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