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Senior Remote Full Stack Web Developer Jobs in Belmont, MA

Horizontal Talent

Senior Optimizely CMS Developer

Salem, MA · Remote

$125K - $165K/yr

Skills * 5+ years of full-stack web development experience. * At least 3+ years of hands-on ... Experience working in remote-first environments and collaborating across multiple locations.

New

Horizontal Talent

Senior .NET Developer Optimizely

Salem, MA · Remote

$59.50 - $78.75/hr

Skills * 5+ years of full-stack web development experience. * At least 3+ years of hands-on ... Experience working in remote-first environments and collaborating across multiple locations.

New

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Senior Remote Full Stack Web Developer information

See Belmont, MA salary details

$54.6K

$130.1K

$266K

How much do senior remote full stack web developer jobs pay per year?

As of Aug 13, 2026, the average yearly pay for senior remote full stack web developer in Belmont, MA is $130,119.00, according to ZipRecruiter salary data. Most workers in this role earn between $88,300.00 and $141,300.00 per year, depending on experience, location, and employer.

What is the difference between Senior Remote Full Stack Web Developer vs Senior Front End Developer?

AspectSenior Remote Full Stack Web DeveloperSenior Front End Developer
Primary FocusBoth front-end and back-end developmentPrimarily user interface and client-side development
Required SkillsJavaScript, HTML, CSS, server-side languages, databasesJavaScript, HTML, CSS, UI/UX design
Work EnvironmentRemote, collaborative teams, full project lifecycleRemote or on-site, UI-focused projects
Common UsageUsed in full-stack development teams across industriesUsed in front-end teams, UI/UX agencies

Both roles require strong JavaScript, HTML, and CSS skills. The Senior Remote Full Stack Web Developer handles both client and server-side tasks, while the Senior Front End Developer specializes in creating engaging user interfaces. Your choice depends on whether you prefer working across the entire technology stack or focusing on front-end design and user experience.

What cities near Belmont, MA are hiring for Senior Remote Full Stack Web Developer jobs? Cities near Belmont, MA with the most Senior Remote Full Stack Web Developer job openings:
Senior Remote Full Stack Web Developer jobs near you
Infographic showing various Senior Remote Full Stack Web Developer job openings in Belmont, MA as of August 2026, with employment types broken down into 1% Internship, 80% Full Time, 11% Part Time, 1% Temporary, and 7% Contract. Highlights an 84% Physical, 4% Hybrid, and 12% Remote job distribution, with an average salary of $130,119 per year, or $62.6 per hour.

Senior .NET Developer Optimizely

Horizontal Talent

Medford, MA • Remote

$56.75 - $75/hr

Full-time

Posted yesterday

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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