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Javascript Backend Developer Jobs in Philadelphia, PA

AEFIS

UI/UX Developer (Remote)

Philadelphia, PA · Remote

$51.25 - $66.50/hr

Work together with back-end developers and other IT professionals to complete requirements ... Solid experience in designing and building highly usable UI * Strong knowledge of Javascript/ES6

AEFIS

UI/UX Developer (Remote)

Philadelphia, PA · On-site +1

$50.50 - $65.50/hr

Work together with back-end developers and other IT professionals to complete requirements ... Solid experience in designing and building highly usable UI * Strong knowledge of Javascript/ES6

Sarian, Inc.

Python + Angular Developer

Pennington, NJ · On-site

Develop and maintain robust, scalable backend services using Python. * Build dynamic and responsive ... HTML5, CSS3, JavaScript, TypeScript. * Strong problem-solving skills and ability to work in a team ...

Mondo

Lead Software Engineer

Wilmington, DE · On-site

Required : • 10+ years of professional software engineering experience • Strong hands-on frontend engineering experience with React, TypeScript, and JavaScript • Strong backend engineering ...

Prophecy Technologies

Java Developer

Wilmington, DE · On-site

$49.50 - $64/hr

... Angular, JavaScript, TypeScript, HTML5, and CSS3. * Strong expertise in Python for backend ... Bachelor's degree in Computer Science, Engineering, or a related field. * 6+ years of professional ...

TMS

Full Stack Java Developer

Fort Washington, PA · On-site

$65 - $70/hr

HTML5, CSS3, JavaScript/TypeScript - Experience with backend development using Java, Spring Boot ... of DevOps practices and CI/CD Pipelines - Experience with version control systems (e.g., Git ...

Siri InfoSolutions Inc

Python Developer

Pennington, NJ · On-site

$110K - $120K/yr

Design and implement back-end software components using Python frameworks such as Django or Flask ... Develop and maintain front-end web pages using HTML, CSS, and JavaScript * Create and maintain APIs ...

PTR Global

Full Stack Developer - Intermediate

Wilmington, DE · On-site

$50 - $55/hr

  • Medical

  • Dental

  • Vision

  • Retirement

  • PTO

Junior Java Full Stack Developer - W2 Only Location: Wilmington, Delaware - Onsite Duration ... HTML, CSS, JavaScript, and frameworks like React or Angular. * Strong knowledge of back-end ...

Artech Information System LLC

UI Developer

Mount Laurel, NJ · On-site

$49.50 - $64.25/hr

Understanding of object-oriented, functional, and modularization programming * Experience using Git ... JavaScript (React, Redux), HTML5/CSS3 Back End: PHP (Lumen REST API) Database: NoSQL (MongoDB ...

TiltEdge Solutions LLC

Software Engineer

Malvern, PA · On-site

$50/hr

We are seeking a Senior Software Engineer with deep expertise in Python-based back-end development, modern JavaScript frameworks (Angular or React), and cloud-native architecture utilizing AWS. In ...

Lorhan Corp

.NET Developer

Philadelphia, PA · On-site

$48.75 - $64.25/hr

Net with SQL Server backend Required Skills * Analyze, design, modify, build, and deploy ... Familiar with Angular, JavaScript, Oracle, SQL Server, Visual Studio Developer, SSIS, SSRS, Azure

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All JobsJavascript Backend Developer JobsJavascript Backend Developer Jobs in Philadelphia, PA

Javascript Backend Developer information

See Philadelphia, PA salary details

$12

$58

$85

How much do javascript backend developer jobs pay per hour?

As of Aug 18, 2026, the average hourly pay for javascript backend developer in Philadelphia, PA is $58.26, according to ZipRecruiter salary data. Most workers in this role earn between $47.79 and $68.89 per hour, depending on experience, location, and employer.

What does a JavaScript backend developer do?

A JavaScript Backend Developer is responsible for building and maintaining the server-side logic, databases, and APIs that power web applications. They use JavaScript, often with frameworks like Node.js, to process requests, manage data, and ensure smooth communication between the frontend and backend of an application. Their work ensures that web applications are scalable, secure, and efficient. JavaScript Backend Developers also collaborate with frontend developers and other team members to deliver seamless user experiences.

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

To thrive as a Javascript Backend Developer, you need strong proficiency in JavaScript (especially Node.js), knowledge of backend frameworks, and a solid understanding of databases such as MongoDB or PostgreSQL. Familiarity with development tools like Git, RESTful APIs, Docker, and cloud platforms, as well as relevant certifications, is highly valuable. Excellent problem-solving, teamwork, and communication skills help you collaborate effectively and deliver robust solutions. These abilities are crucial for building scalable, secure, and maintainable backend services that power modern applications.

What are the typical challenges a JavaScript backend developer faces when scaling applications for high traffic?

JavaScript Backend Developers, especially those working with Node.js, often encounter challenges related to handling high concurrency, optimizing database queries, and maintaining application performance under heavy load. Ensuring efficient memory management and implementing robust error handling are also critical when scaling. Working closely with DevOps and frontend teams to optimize APIs and monitor system health is essential for delivering reliable, scalable backend solutions.

What is the difference between Javascript Backend Developer vs Javascript Frontend Developer?

AspectJavascript Backend DeveloperJavascript Frontend Developer
Primary FocusServer-side development, APIs, databasesUser interface, client-side interactions
Required SkillsNode.js, databases, server managementHTML, CSS, JavaScript, UI frameworks
Work EnvironmentBack-end servers, cloud platformsWeb browsers, client devices
Common UsageBuilding APIs, server logicDesigning web pages, user experience

The main difference between a Javascript Backend Developer and a Javascript Frontend Developer lies in their focus areas. Backend developers handle server-side logic, databases, and APIs, while frontend developers focus on creating engaging user interfaces and client-side interactions. Both roles require JavaScript skills but apply them in different parts of web development projects.

What are popular job titles related to Javascript Backend Developer jobs in Philadelphia, PA?

For Javascript Backend Developer jobs in Philadelphia, PA, the most frequently searched job titles are:

What job categories do people searching Javascript Backend Developer jobs in Philadelphia, PA look for?

The top searched job categories for Javascript Backend Developer jobs in Philadelphia, PA are:

What cities near Philadelphia, PA are hiring for Javascript Backend Developer jobs?

Cities near Philadelphia, PA with the most Javascript Backend Developer job openings:

Javascript Backend Developer jobs near you
Infographic showing various Javascript Backend Developer job openings in Philadelphia, PA as of August 2026, with employment types broken down into 81% Full Time, 5% Part Time, and 14% Contract. Highlights an 83% Physical, 5% Hybrid, and 12% Remote job distribution, with an average salary of $121,178 per year, or $58.3 per hour.

UI/UX Developer (Remote)

AEFIS

Philadelphia, PA • Remote

$51.25 - $66.50/hr

Full-time

Re-posted 20 days ago

Job description

ABOUT OUR COMPANY

We are a young and energetic software company, currently seeking to grow our amazing team! In this position, you will have the opportunity to influence and help the continued development of an innovative Software-as-a-Service product that is aiming to revolutionize the way quality is measured in the institutions of higher education here in the US and abroad. This opportunity will provide you with unique and rewarding experiences by joining a rapidly growing higher education enterprise software product development team with global outreach and strong innovative implications. For more information, visit www.aefis.com

DOES THIS SOUND LIKE YOU?

You are passionate about creating great user experiences. You want to play a critical role in a fast-growing technology company. You are self-motivated, willing to play a key role in the user interface of the application and company growth. You are smart, have experience in UI development and open to learn new technologies. You are confident in your verbal and written communication skills and have a good understanding of usability and design concepts.

SO WHAT CAN I EXPECT FROM THE JOB?

Responsibilities

  • Develop a great user interface based on product requirements
  • Create high-quality, high-performance source code
  • Ensure usability, use of good design elements and consistency in the user experience
  • Work within deadlines to produce successful end results
  • Work together with back-end developers and other IT professionals to complete requirements
  • Maintain and improve existing code as necessary
  • Take part in all SDLC processes as part of the team
  • Complete unit testing of the implementation and write unit tests as necessary
  • Help support engineers to perform troubleshooting and debugging
  • Create necessary technical documentation

Qualifications

  • Experience working as a UI developer using React web framework
  • Solid experience in designing and building highly usable UI
  • Strong knowledge of Javascript/ES6
  • Experience with additional programming languages a plus
  • Bachelor's Degree or Higher
  • Ability to work well in a team environment and with deadlines
  • Exceptional organizational and multitasking skills
  • Articulate written and verbal communication skills

As a member of our team, you will be creating high-quality user experiences. We are looking for someone who is curious, clever, and interested in continuous learning and adopting new technologies while implementing the functional requirements at hand.

**Please include a cover letter and resume.**