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Remote Backend Developer Internship Jobs in Boulder, CO

Horizontal Talent

Sr. Optimizely Developer

Denver, CO · Remote

$118K - $155K/yr

Strong backend development skills with C# and .NET Core/MVC, especially in Optimizely CMS ... Experience working in remote-first environments and collaborating across multiple locations.

New

Clerkie

Full-Stack Engineer

Denver, CO · Remote

$90/hr

Clerkie is a remote-first company, with over 40 employees spanning 4 time zones across the United ... Scaled backend systems to support growing enterprise usage * Built new infrastructure to support ...

Maxar

Mid-Level Software Engineer

Westminster, CO · On-site +1

Must be willing to work in a remote setting or nearby Vantor facility and comfortable communicating ... Experience with backend development using Java andRust. * Experience developing and maintaining low ...

Releady

Principal Full Stack Engineer

Denver, CO · Remote

$85 - $100/hr

You will write production code every day across the full platform--front-end, back-end, and full ... Hybrid or Remote, however must reside in the following states: WA, OH, CA, AZ, CO, CT, FL, GA, MD ...

Cisco

Software Engineer

Boulder, CO · On-site +1

$126K - $182K/yr

We foster a supportive, hybrid/remote environment where technical excellence and continuous ... Your Impact Architect scalable backend services using Go or Java to process data pipelines with ...

LearnLux

Senior Full Stack Product Engineer

Denver, CO · Remote

... backend integrations, and agentic automation. Your contributions will support a scalable, secure ... Remote candidates will be evaluated on a case-by-case basis. What you'll do * Design and ship AI ...

KORE1 Technologies

Principal Engineer

Denver, CO · Remote

... remote. Why This Role Exists We operate a large-scale, multi-tenant SaaS platform supporting ... Our backend infrastructure - built on event-driven, serverless AWS architecture - powers critical ...

Synergetics

Software Engineer II

Denver, CO · On-site +1

$90K - $110K/yr

You will also contribute to DevOps activities-including CI/CD automation, infrastructure as code ... This is a mostly remote position; candidates should reside or be willing to relocate to Northern ...

Ardent Mills

IT QA Engineer (Remote)

Denver, CO · On-site +1

Strong SQL skills for data validation, test data setup, and backend verification against SQL Server ... and DevOps practices. * API-level test automation expertise. * Experience with web service ...

New

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Remote Backend Developer Internship information

See Boulder, CO salary details

$12

$59

$87

How much do remote backend developer internship jobs pay per hour?

As of Aug 10, 2026, the average hourly pay for remote backend developer internship in Boulder, CO is $59.88, according to ZipRecruiter salary data. Most workers in this role earn between $49.13 and $70.82 per hour, depending on experience, location, and employer.

What is the difference between Remote Backend Developer Internship vs Remote Software Engineer Internship?

AspectRemote Backend Developer InternshipRemote Software Engineer Internship
Required CredentialsBasic programming skills, coursework in backend development, some internshipsSimilar, often includes broader software development knowledge
Work EnvironmentRemote, collaborative teams, tech companies, startupsRemote, diverse industries, tech firms, startups
Employer & Industry UsageTech companies, startups focusing on backend systemsTech companies, startups, broader software projects
Search & Comparison IntentPeople interested in backend-specific roles, internshipsPeople exploring software engineering internships broadly

The Remote Backend Developer Internship focuses specifically on backend technologies like databases, server-side logic, and APIs, while the Remote Software Engineer Internship covers a broader range of software development tasks. Both roles are remote, often in tech companies or startups, and require foundational programming skills. The main difference lies in specialization: backend development versus general software engineering.

What are popular job titles related to Remote Backend Developer Internship jobs in Boulder, CO? For Remote Backend Developer Internship jobs in Boulder, CO, the most frequently searched job titles are:
What job categories do people searching Remote Backend Developer Internship jobs in Boulder, CO look for? The top searched job categories for Remote Backend Developer Internship jobs in Boulder, CO are:
What cities near Boulder, CO are hiring for Remote Backend Developer Internship jobs? Cities near Boulder, CO with the most Remote Backend Developer Internship job openings:
Remote Backend Developer Internship jobs near you

Sr. Optimizely Developer

Horizontal Talent

Denver, CO • Remote

$118K - $155K/yr

Full-time

Posted 3 days ago

New

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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