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Senior Javascript Developer Jobs in Philadelphia, PA

TrafficCast

Senior Software Developer

Philadelphia, PA · On-site

$90K - $125K/yr

Position Senior Software Engineer TCI is seeking a high-energy, experienced server side software ... Js or a similar Javascript framework. * Experience with Object-Oriented Programming. * SQL with ...

TherapyNotes.com

Senior Software Developer

Philadelphia, PA · On-site +1

$110K - $135K/yr

About The Position TherapyNotes is seeking a Senior Software Developer to help drive the evolution ... Strong experience with Angular, .NET Core, C#, TypeScript, JavaScript, and HTML/CSS * Solid ...

USLI

Senior Developer

Wayne, PA · On-site

$49.50 - $65.25/hr

Senior Developer Location: Wayne, PA About Us: At USLI, we're not just about insurance - we are ... NET, JavaScript/jQuery/jSON, Knockout.js, Angular.js, SQL Server, SQL/XML and emerging Microsoft ...

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How much do senior javascript developer jobs pay per hour?

As of Aug 16, 2026, the average hourly pay for senior javascript developer in Philadelphia, PA is $60.95, according to ZipRecruiter salary data. Most workers in this role earn between $54.57 and $69.38 per hour, depending on experience, location, and employer.

What is a senior JavaScript developer?

A Senior JavaScript Developer is a highly experienced programmer specializing in JavaScript, including frameworks like React, Angular, or Node.js. They are responsible for designing, developing, and optimizing web applications, ensuring high performance and maintainability. Additionally, they provide technical leadership, mentor junior developers, and collaborate with cross-functional teams to deliver scalable solutions. Strong problem-solving skills, deep knowledge of JavaScript best practices, and experience with modern development tools are essential for this role.

What are typical challenges faced by senior JavaScript developers in day-to-day work?

Senior Javascript Developers often encounter complex challenges such as optimizing web application performance, ensuring code scalability and maintainability, and integrating with diverse APIs and services. They are also expected to troubleshoot legacy code and address security vulnerabilities, all while keeping up with the rapidly evolving JavaScript ecosystem. Collaborating with designers, product managers, and junior developers can add layers of complexity to project requirements. However, overcoming these challenges is rewarding and provides opportunities to shape technical strategy and influence best practices within the team.

What are the key skills and qualifications needed to thrive as a senior JavaScript developer?

To thrive as a Senior Javascript Developer, a strong command of JavaScript (including ES6+), advanced front-end frameworks (like React, Angular, or Vue), and back-end technologies (such as Node.js) are essential, along with several years of professional coding experience. Familiarity with version control systems (like Git), CI/CD pipelines, and relevant certifications (e.g., AWS Certified Developer or JavaScript certifications) is highly valued. Excellent problem-solving abilities, mentorship skills, and effective communication help developers collaborate and lead within cross-functional teams. These skills enable Senior Javascript Developers to build robust applications, guide junior team members, and drive innovation in fast-paced tech environments.

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Senior Software Developer

TrafficCast

Philadelphia, PA • On-site

$90K - $125K/yr

Full-time

Medical, Dental, Life, Retirement, PTO

Re-posted 28 days ago

Job description

Company Description
Location: Philadelphia, PA Area (flexible)
Job Type: Full Time or Consultant to Full Time
Salary: $90k - $125k + Stock Options (depending on skillset)
Company Description
TrafficCast International, Inc. (http://www.trafficcast.com) is a leading company in digital traffic information and service provision.
Based in Madison, WI, with satellite offices in Chicago, Atlanta, Wilmington DE, Irvine CA, and Shanghai, China, TrafficCast provides innovative technology and sophisticated data modeling to provide real-time and predictive traffic information that enhances and enables high performing location based services and dynamic navigation services to TTWN, Sirius XM Satellite Radio, and TV stations. Now covering over 880,000 miles of roadway, Dynaflow™ provides real time and predictive road information derived from GPS tracking data, public sensors and reports of accidents, road works and weather. For the more granular data required by public agencies for planning and operations, TrafficCast developed BlueTOAD™, an advanced wireless device that directly computes travel times and vehicle behaviors from the detection of Bluetooth signals emanating from passing vehicles.
Job Description
Position
Senior Software Engineer
Job Description:
TCI is seeking a high-energy, experienced server side software developer with solid experience in C, Java, Python, and like languages to help drive design, development, and ongoing commercialization of TCI systems. Reporting to the Sr. Director of Software Engineering, the Sr. Software Engineer serves as a key team member and an active participant in making of strategic technology decisions affecting TCI products.
The Senior Software Engineer will have primary responsibility for developing the architecture, code base, integration, and implementation of server-side software in a multi-platform, real-time environment that supports the various mobile applications. In this role, this person will work in an exciting and engaging agile environment where they will be encouraged to expand their skills, test their creative boundaries, share new ideas, and most importantly - have fun.
Skills / Responsibilities
  • Contribute to cross-functional projects in an Agile/Scrum environment.
  • Implement automated unit and integration tests (TDD preferred).
  • Translate verbal requirements into written use cases and testable stories.
  • Design, build and maintain efficient, reusable, and reliable code in a cloud environment.
  • Write maintainable, readable code.
  • Identify bottlenecks and bugs, and devise solutions to anticipate, mitigate, and address these issues ahead of time.
  • Operationally support systems for the business.
  • Implement and Monitor analytics to ensure the health of systems.

Qualifications
Qualifications
  • Bachelor's degree in Computer Science or related field.
  • At least 7 years of Software Engineering experience.
  • At least 3 years of experience with PHP.
  • At least 1 year of experience with Laravel.
  • At least 6 months of experience with Python, Python 3 is a plus.
  • Experience with TailwindCSS.
  • Experience with Vue.Js or a similar Javascript framework.
  • Experience with Object-Oriented Programming.
  • SQL with either MySQL or PostgreSQL.
  • Knowledge of the cloud with AWS (Preferred), Azure, DigitalOcean or similar cloud environments
  • Experience with Linux and knowledge about Shell scripting.
  • Experience with Java, C++, Docker is a plus.
  • Experience with Apache Tomcat application server
  • Experience with cloud-based software architectures, AWS preferred
  • Depth of experience with complex, real-time delivery of content in both mobile applications and server based systems.
  • Experience with mapping / routing engines and location-based services.
  • Strong problem solving and decision-making skills as well as strong communication skills

Additional Information
Competitive compensation and benefits commensurate with experience. Benefits for full-time employees include participation in the Company's retirement plan, bonus, medical, dental, life insurance, LTD/STD, paid vacations/sick day/holidays, and advancement opportunities.
Contact Information and Application Deadline
Please send your resume, including salary history and expectations
TrafficCast International is an equal opportunity employer.

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