ZipRecruiter

Log In

1

Junior Frontend Developer Jobs in Chelsea, MA (NOW HIRING)

Horizontal Talent

Senior Optimizely CMS Developer

Newton, MA · Remote

$126K - $165K/yr

This Senior Optimizely Developer role is a great fit for someone who enjoys building scalable CMS ... Partner on server-side testing and feature flagging when frontend testing is not the best fit.

New

Horizontal Talent

Senior CMS Developer Optimizely

Salem, MA · Remote

$125K - $165K/yr

This Senior Optimizely Developer role is a great fit for someone who enjoys building scalable CMS ... Partner on server-side testing and feature flagging when frontend testing is not the best fit.

New

Horizontal Talent

Senior Optimizely CMS Developer

Everett, MA · Remote

$118K - $155K/yr

This Senior Optimizely Developer role is a great fit for someone who enjoys building scalable CMS ... Partner on server-side testing and feature flagging when frontend testing is not the best fit.

New

Horizontal Talent

Senior Optimizely CMS Developer

Revere, MA · Remote

$118K - $155K/yr

This Senior Optimizely Developer role is a great fit for someone who enjoys building scalable CMS ... Partner on server-side testing and feature flagging when frontend testing is not the best fit.

New

Horizontal Talent

Senior Optimizely CMS Developer

Malden, MA · Remote

$119K - $157K/yr

This Senior Optimizely Developer role is a great fit for someone who enjoys building scalable CMS ... Partner on server-side testing and feature flagging when frontend testing is not the best fit.

New

Horizontal Talent

Senior Optimizely CMS Developer

Chelsea, MA · Remote

$125K - $164K/yr

This Senior Optimizely Developer role is a great fit for someone who enjoys building scalable CMS ... Partner on server-side testing and feature flagging when frontend testing is not the best fit.

New

Horizontal Talent

Senior CMS Developer Optimizely

Peabody, MA · Remote

$127K - $167K/yr

This Senior Optimizely Developer role is a great fit for someone who enjoys building scalable CMS ... Partner on server-side testing and feature flagging when frontend testing is not the best fit.

New

Horizontal Talent

Senior CMS Developer Optimizely

Beverly, MA · Remote

$126K - $166K/yr

This Senior Optimizely Developer role is a great fit for someone who enjoys building scalable CMS ... Partner on server-side testing and feature flagging when frontend testing is not the best fit.

New

Horizontal Talent

Senior CMS Developer Optimizely

Lowell, MA · Remote

$115K - $151K/yr

This Senior Optimizely Developer role is a great fit for someone who enjoys building scalable CMS ... Partner on server-side testing and feature flagging when frontend testing is not the best fit.

New

Horizontal Talent

Senior CMS Developer Optimizely

Needham, MA · Remote

$126K - $166K/yr

This Senior Optimizely Developer role is a great fit for someone who enjoys building scalable CMS ... Partner on server-side testing and feature flagging when frontend testing is not the best fit.

New

Horizontal Talent

Senior Optimizely CMS Developer

Needham, MA · Remote

$126K - $166K/yr

This Senior Optimizely Developer role is a great fit for someone who enjoys building scalable CMS ... Partner on server-side testing and feature flagging when frontend testing is not the best fit.

New

Horizontal Talent

Senior Optimizely CMS Developer

Boston, MA · Remote

$124K - $164K/yr

This Senior Optimizely Developer role is a great fit for someone who enjoys building scalable CMS ... Partner on server-side testing and feature flagging when frontend testing is not the best fit.

New

previous page

Showing results 41-60

All JobsFrontend Developer JobsJunior Frontend Developer JobsJunior Frontend Developer Jobs in Chelsea, MA

Junior Frontend Developer information

See Chelsea, MA salary details

$26.1K

$96.7K

$149.4K

How much do junior frontend developer jobs pay per year?

As of Aug 13, 2026, the average yearly pay for junior frontend developer in Chelsea, MA is $96,683.00, according to ZipRecruiter salary data. Most workers in this role earn between $72,800.00 and $94,500.00 per year, depending on experience, location, and employer.

What does a junior frontend developer do?

A typical day for a Junior Frontend Developer often involves writing and updating code for website layouts, implementing design changes, and troubleshooting user interface issues. You'll collaborate frequently with designers, senior developers, and back-end team members to ensure a seamless integration of features and a consistent user experience. Many junior developers also participate in code reviews and team meetings, allowing them to learn from feedback and stay aligned with project goals. It's a dynamic role that balances coding, collaboration, and continuous learning, making it engaging and rewarding for those starting their tech careers.

What is a junior frontend developer?

A Junior Frontend Developer is an entry-level role responsible for building and maintaining the user interface of websites or web applications. They work with technologies like HTML, CSS, and JavaScript to create interactive and visually appealing experiences. Typically, they collaborate with designers, backend developers, and senior engineers to implement features and fix bugs. This role requires a good understanding of responsive design, browser compatibility, and basic version control with tools like Git. Junior developers often learn on the job and gain experience to advance to mid-level or senior positions.

What skills and qualifications are needed to thrive as a junior frontend developer?

To thrive as a Junior Frontend Developer, you need a strong grasp of HTML, CSS, and JavaScript, often supported by a relevant degree or coding bootcamp experience. Familiarity with version control systems (like Git), frontend frameworks (such as React or Vue), and basic debugging tools is common in this role. Attention to detail, a willingness to learn, and effective communication help junior developers work well within teams and adapt to new technologies. These technical and interpersonal skills ensure you can contribute to building user-friendly web applications and grow within a collaborative development environment.

What are the most commonly searched types of Frontend Developer jobs in Chelsea, MA?

The most popular types of Frontend Developer jobs in Chelsea, MA are:

What are popular job titles related to Junior Frontend Developer jobs in Chelsea, MA?

For Junior Frontend Developer jobs in Chelsea, MA, the most frequently searched job titles are:

What cities near Chelsea, MA are hiring for Junior Frontend Developer jobs?

Cities near Chelsea, MA with the most Junior Frontend Developer job openings:

Junior Frontend Developer jobs near you
Infographic showing various Junior Frontend Developer job openings in Chelsea, MA as of August 2026, with employment types broken down into 84% Full Time, and 16% Contract. Highlights an 81% In-person, 5% Hybrid, and 14% Remote job distribution, with an average salary of $96,683 per year, or $46.5 per hour.

Senior CMS Developer Optimizely

Horizontal Talent

Weymouth, MA • Remote

$122K - $160K/yr

Full-time

Posted 2 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.

Apply