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Trainee React Frontend Developer Jobs in Reading, PA

Penske

Software Engineer II - Digital Products

Reading, PA · On-site

$93K - $128K/yr

React, Angular, jQuery, HTML, CSS, JavaScript, Spring/Spring-MVC, myBatis, RESTful APIs. • 1-2 ... of DevOps tools, CI/CD, and automated testing practices. • Familiarity with front-end UI/UX ...

Varsity Tutors

JavaScript Tutor

Reading, PA · Remote

$18 - $40/hr

... React and Node.js. Ability to explain callback functions, scope and hoisting, and the event loop ... web programming through advanced front-end and full-stack JavaScript development. * Effective ...

Penske

Software Engineer II - Digital Products

Reading, PA · On-site

$93K - $128K/yr

React, Angular, jQuery, HTML, CSS, JavaScript, Spring/Spring-MVC, myBatis, RESTful APIs. 1-2 years ... Knowledge of DevOps tools, CI/CD, and automated testing practices. Familiarity with front-end UI/UX ...

Penske

Software Engineer II - Digital Products

Reading, PA · On-site

$93K - $128K/yr

React, Angular, jQuery, HTML, CSS, JavaScript, Spring/Spring-MVC, myBatis, RESTful APIs. 1-2 years ... Knowledge of DevOps tools, CI/CD, and automated testing practices. Familiarity with front-end UI/UX ...

All JobsReact Frontend Developer JobsTrainee React Frontend Developer JobsTrainee React Frontend Developer Jobs in Reading, PA

Trainee React Frontend Developer information

See Reading, PA salary details

$40.8K

$106K

$149.3K

How much do trainee react frontend developer jobs pay per year?

As of Aug 16, 2026, the average yearly pay for trainee react frontend developer in Reading, PA is $106,034.00, according to ZipRecruiter salary data. Most workers in this role earn between $99,900.00 and $116,200.00 per year, depending on experience, location, and employer.

What are the key skills and qualifications needed to thrive as a Trainee React Frontend Developer, and why are they important?

To thrive as a Trainee React Frontend Developer, you need a solid understanding of JavaScript, HTML, CSS, and foundational knowledge of React.js, often supported by a relevant degree or coding bootcamp experience. Familiarity with version control systems like Git, basic knowledge of RESTful APIs, and exposure to development tools such as npm or Yarn are typically expected. Strong problem-solving abilities, attention to detail, and effective communication help you collaborate well within a team and adapt to feedback. These skills are crucial for building responsive user interfaces, maintaining code quality, and contributing effectively to dynamic development projects.

What types of projects and tasks can a Trainee React Frontend Developer expect to work on during their first six months?

As a Trainee React Frontend Developer, you will typically start with smaller tasks such as fixing bugs, writing unit tests, and implementing simple UI components under the guidance of senior developers. You'll gradually progress to working on larger features, integrating APIs, and collaborating with designers to ensure user interfaces are both functional and visually appealing. Regular code reviews and pair programming sessions are common, providing valuable feedback and learning opportunities. This phase is crucial for building a strong foundation in React and understanding best practices in frontend development.

What does a Trainee React Frontend Developer do?

A Trainee React Frontend Developer is an entry-level software developer who focuses on building and maintaining the user interface of web applications using the React JavaScript library. They work under the guidance of senior developers to learn best practices, write clean code, and gain experience with technologies such as HTML, CSS, JavaScript, and React. Their responsibilities typically include assisting in the development of new features, fixing bugs, and learning how to use development tools and workflows. The goal is to build foundational skills in frontend development while contributing to real-world projects.

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

AspectTrainee React Frontend DeveloperJunior React Developer
Required SkillsBasic knowledge of React, HTML, CSS, JavaScriptProficient in React, JavaScript, HTML, CSS, and some project experience
Work EnvironmentTraining programs, internships, entry-level projectsFull-time roles, collaborative teams, ongoing project development
CertificationsOptional, often part of training coursesPreferred but not mandatory; relevant certifications can be advantageous
ResponsibilitiesLearning, assisting in tasks, shadowing senior developersImplementing features, fixing bugs, contributing to codebase

The main difference between a Trainee React Frontend Developer and a Junior React Developer lies in experience and responsibilities. Trainees are typically in training or internship phases, focusing on learning and assisting, while Junior React Developers are expected to have a solid understanding of React and contribute actively to projects.

What are popular job titles related to Trainee React Frontend Developer jobs in Reading, PA?

For Trainee React Frontend Developer jobs in Reading, PA, the most frequently searched job titles are:

What job categories do people searching Trainee React Frontend Developer jobs in Reading, PA look for?

The top searched job categories for Trainee React Frontend Developer jobs in Reading, PA are:

What cities near Reading, PA are hiring for Trainee React Frontend Developer jobs?

Cities near Reading, PA with the most Trainee React Frontend Developer job openings:

Trainee React Frontend Developer jobs near you

Senior Optimizely CMS Developer

Horizontal Talent

Pottstown, PA • Remote

$111K - $146K/yr

Full-time

Posted 5 days ago

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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