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Senior Frontend Developer Jobs in Pennsylvania (NOW HIRING)

Horizontal Talent

Senior CMS Developer Optimizely

Bristol, PA · Remote

$112K - $147K/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.

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Senior Frontend Developer information

See Pennsylvania salary details

$39.1K

$133.4K

$181.9K

How much do senior frontend developer jobs pay per year?

As of Aug 15, 2026, the average yearly pay for senior frontend developer in Pennsylvania is $133,386.00, according to ZipRecruiter salary data. Most workers in this role earn between $115,300.00 and $151,400.00 per year, depending on experience, location, and employer.

What is the average salary for a senior front-end developer?

The average salary for a senior front-end developer typically ranges from $90,000 to $140,000 annually, depending on experience, location, and company size. Skilled developers proficient in frameworks like React or Angular and with strong UI/UX knowledge tend to earn higher salaries.

What is a senior frontend developer?

Senior Frontend Developers are experienced software professionals who specialize in building and maintaining the user-facing parts of web applications. They work with technologies like HTML, CSS, and JavaScript frameworks (such as React, Angular, or Vue.js) to create responsive, interactive, and visually appealing interfaces. In addition to coding, they often lead frontend projects, mentor junior developers, and collaborate with designers and backend engineers to ensure seamless user experiences. Their role also includes optimizing web performance and adhering to best practices in accessibility and usability.

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

To thrive as a Senior Frontend Developer, you need advanced proficiency in HTML, CSS, JavaScript, and modern frameworks like React or Angular, along with a relevant degree or equivalent experience. Familiarity with version control systems (such as Git), frontend build tools, testing libraries, and possibly certifications like AWS Certified Developer are typically important. Strong problem-solving abilities, effective communication, and a collaborative mindset are crucial soft skills for excelling in this role. These skills ensure the delivery of high-quality, scalable user interfaces that meet both technical and business requirements.

What are some common challenges senior frontend developers face when leading projects, and how can they address them?

Senior Frontend Developers often encounter challenges such as aligning cross-functional teams, managing technical debt, and maintaining code quality while meeting deadlines. To address these, effective communication with designers, backend engineers, and product managers is crucial. Adopting best practices like code reviews, thorough documentation, and utilizing modern frameworks helps streamline collaboration and ensure maintainability. Additionally, mentoring junior developers and promoting knowledge sharing within the team can foster a more efficient and cohesive work environment.

Are senior front-end developers still in demand?

Senior front-end developers are in high demand due to the ongoing need for skilled professionals who can build responsive, user-friendly interfaces using frameworks like React, Angular, or Vue.js. Companies seek experienced developers to lead projects, improve user experience, and implement modern web technologies, making this a strong career choice in the current job market.

What is the difference between Senior Frontend Developer vs Frontend Engineer?

AspectSenior Frontend DeveloperFrontend Engineer
Required CredentialsBachelor's in CS or related field, extensive experienceBachelor's in CS or related field, strong technical skills
Work EnvironmentCollaborates with designers, backend teams, project managersFocuses on building and optimizing frontend applications
Industry UsageCommon in tech companies, startups, agenciesUsed interchangeably with Senior Frontend Developer in many contexts
Search & Comparison IntentUnderstanding senior-level responsibilities and skillsClarifying role scope and technical focus

While both roles require strong frontend skills and similar educational backgrounds, a Senior Frontend Developer typically has more leadership responsibilities and project oversight. A Frontend Engineer may focus more on technical implementation and architecture. The terms are often used interchangeably, but understanding the nuances helps in job searches and role expectations.

What are the most commonly searched types of Frontend Developer jobs in Pennsylvania?

The most popular types of Frontend Developer jobs in Pennsylvania are:

What are popular job titles related to Senior Frontend Developer jobs in Pennsylvania?

For Senior Frontend Developer jobs in Pennsylvania, the most frequently searched job titles are:

What job categories do people searching Senior Frontend Developer jobs in Pennsylvania look for?

The top searched job categories for Senior Frontend Developer jobs in Pennsylvania are:

What cities in Pennsylvania are hiring for Senior Frontend Developer jobs?

Cities in Pennsylvania with the most Senior Frontend Developer job openings:

Senior Frontend Developer jobs near you
Infographic showing various Senior Frontend Developer job openings in Pennsylvania as of July 2026, with employment types broken down into 100% Full Time. Highlights an 32% In-person, 33% Hybrid, and 35% Remote job distribution, with an average salary of $133,386 per year, or $64.1 per hour.

Senior CMS Developer Optimizely

Horizontal Talent

Bristol, PA • Remote

$112K - $147K/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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