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Mid Level React Developer Jobs in Pennsylvania (NOW HIRING)

System One

Mechanical Engineer (mid-level)

Hookstown, PA · On-site

$52/hr

Mechanical Engineer (mid-level) Location: Hookstown, PA Type: Contract Compensation: $52.00 - DOE Contractor Work Model: Onsite - onsite Hours: 40 hours/week Security Clearance: Must be a US Citizen ...

System One

Mechanical Engineer (mid-level)

Hookstown, PA · On-site

$52/hr

Mechanical Engineer (mid-level) Location: Hookstown, PA Type: Contract Compensation: $52.00 - DOE Contractor Work Model: Onsite - onsite Hours: 40 hours/week Security Clearance: Must be a US Citizen ...

System One

Mechanical Engineer (mid-level)

Hookstown, PA · On-site

$52/hr

Mechanical Engineer (mid-level) Location: Hookstown, PA Type: Contract Compensation: $52.00 - DOE Contractor Work Model: Onsite - onsite Hours: 40 hours/week Security Clearance: Must be a US Citizen ...

System One

Mechanical Engineer (mid-level)

Hookstown, PA · On-site

$52/hr

Mechanical Engineer (mid-level) Location: Hookstown, PA Type: Contract Compensation: $52.00 - DOE Contractor Work Model: Onsite - onsite Hours: 40 hours/week Security Clearance: Must be a US Citizen ...

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All JobsMid Level React Developer JobsMid Level React Developer Jobs in Pennsylvania

Mid Level React Developer information

See Pennsylvania salary details

$40.1K

$129.7K

$158.9K

How much do mid level react developer jobs pay per year?

As of Aug 22, 2026, the average yearly pay for mid level react developer in Pennsylvania is $129,659.00, according to ZipRecruiter salary data. Most workers in this role earn between $106,300.00 and $157,400.00 per year, depending on experience, location, and employer.

What does a mid level React developer do?

A Mid Level React Developer builds and maintains web applications using the React JavaScript library. They are responsible for developing user interfaces, optimizing application performance, and collaborating with designers and back-end developers to deliver seamless user experiences. Mid Level React Developers often write reusable components, manage application state, and ensure code quality through testing and code reviews. They are expected to have a solid understanding of React concepts, JavaScript ES6+, and related tools like Redux, Webpack, or Babel.

What are the key skills and qualifications needed to thrive as a mid level React developer?

To thrive as a Mid Level React Developer, you need strong proficiency in JavaScript, React.js, HTML, and CSS, often supported by a relevant degree or equivalent experience. Familiarity with development tools such as Git, RESTful APIs, and build systems like Webpack or Babel, as well as knowledge of testing frameworks, is typically expected. Effective problem-solving, teamwork, and communication skills help developers collaborate efficiently and adapt to evolving project requirements. These abilities are crucial for building scalable, maintainable applications that meet user needs and business goals.

What are some common challenges faced by mid level React developers when working on larger projects, and how can they be addressed?

Mid-level React developers often encounter challenges such as managing complex component hierarchies, ensuring consistent state management, and maintaining code readability as projects scale. To address these, developers should familiarize themselves with established patterns like Redux or Context API for state management, adopt reusable component structures, and follow best practices for code organization. Regular code reviews and collaborating closely with senior developers and designers also help ensure code quality and project alignment.

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

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

What cities in Pennsylvania are hiring for Mid Level React Developer jobs?

Cities in Pennsylvania with the most Mid Level React Developer job openings:

Mid Level React Developer jobs near you
Infographic showing various Mid Level React Developer job openings in Pennsylvania as of August 2026, with employment types broken down into 74% Full Time, 20% Part Time, and 6% Contract. Highlights an 92% Physical, 3% Hybrid, and 5% Remote job distribution, with an average salary of $129,659 per year, or $62.3 per hour.

Civil Engineer (Mid-Level)

Penn Environmental and Remediation, Inc.

Doylestown, PA • On-site

Full-time

Medical, Dental, Vision, Retirement, PTO

Posted 23 days ago

Job description

Job Description:
At Penn E&R, we empower professionals to create lasting, positive impact through environmental remediation, civil engineering design, and regulatory guidance that protect ecosystems, restore land, and improve infrastructure. Whether you're cleaning up a former industrial site or designing a stormwater management system for a new development, your work here contributes to a safer, more sustainable world.
Bring your creativity, resourcefulness, and drive to Penn E&R, where every day is an opportunity to learn, grow, and lead. Ready to take on what's next? Let's make it happen together!
Penn E&R is seeking a full-time Civil Engineer (Mid-level). While you will be based out of our Doylestown, PA office, we offer hybrid flexibility. You will have the opportunity to perform a wide range of tasks across all of Penn E&R's market sectors and be expected to perform both office-based and field-based assignments.
Qualifications include:
  • Bachelor of Science degree in Civil/Environmental Engineering or related field

  • Engineer In Training license

  • Professional license is preferred

  • 5 to 10 years of civil engineering experience

  • Work experience in the following is required:

  • Hydrology and hydraulics

  • Erosion and sediment controls

  • Stormwater management controls

  • Land Development

  • Grading Design

  • AutoCAD Civil 3D

Applicable work experience for this role includes:
  • Provide technical guidance for the preparation of site plans, erosion and sediment control plans, post-construction stormwater management plans, and land development/subdivision plans

  • Hydrology and hydraulic and drainage calculations

  • Erosion and sediment control design

  • Grading Design

  • Post-Construction Stormwater Management SCM design

  • AutoCAD/Civil 3D and standard drafting techniques and applications with experience in the preparation of the following:

  • Creating 3-D surfaces

  • Grading plans

  • Profiles/cross-sections

  • Pipe networks and corridors

  • Working with other Project Managers to coordinate with clients and prepare proposals

  • Opportunities to develop project management and business development skills with a team of other professionals.

We know that great work happens when people feel supported both on and off the job. That's why we offer balance and benefits that support you.
  • Competitive compensation and performance-based bonuses

  • Comprehensive health, dental, vision, and retirement benefits

  • Paid time off and flexible scheduling where possible

  • A strong commitment to field and office safety

  • A stable, growing company with local roots and regional impact

Penn E&R, Inc. is an Equal Employment Opportunity employer. We adhere to a policy of making employment decisions without regards to race, color, religion, sex, age, disability or any other protected categories. It is our intention that all qualified applicants be given an equal opportunity and that selection decisions be based on job-related factors.

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