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Javascript Backend Developer Jobs in Whittier, CA

Fluxergy

Software Engineer III - Backend

Irvine, CA

Proficiency in multiple server-side programming languages and frameworks. (Python, Javascript ... Understanding of backend performance optimization and best coding practices. * Strong communication ...

Eitacies Inc

Senior Front End Developer

Los Angeles, CA · On-site

$55 - $60/hr

You have a strong command of HTML , CSS , JavaScript , and TypeScript . * You re experienced in ... Partner with designers, back-end developers, and product managers to bring ideas to life. * Craft ...

Techworkers

JavaScript Engineer

Los Angeles, CA · On-site

... BackEnd service to scale. • Experience with building microservices, concurrency testing ... EC2, Lambda, API Gateway (to name a few) • Excellent knowledge of system engineering, load ...

Prodege LLC

Front-End Developer

El Segundo, CA · On-site

$124K - $157K/yr

Collaborate with back-end developers and web designers to integrate front-end and back-end ... JavaScript (ES5 and modern ES6+); (semantic) HTML and CSS; web accessibility standards and ...

Prodege LLC

Front-End Developer

El Segundo, CA

$124K - $157K/yr

Collaborate with back-end developers and web designers to integrate front-end and back-end ... JavaScript (ES5 and modern ES6+); (semantic) HTML and CSS; web accessibility standards and ...

TECHOAUTH SOLUTIONS LLC

UI Developer

Rancho Cucamonga, CA · On-site

$110K - $112K/yr

Collaborate with designers, product managers, and backend developers to create seamless and ... Experience with modern JavaScript frameworks/libraries (e.g., React, Angular, Vue.js). * Strong ...

Helios WorldWide

Front End Developer

Santa Monica, CA · Remote

$106K - $123K/yr

... and JavaScript. * Debug and troubleshoot issues to identify and resolve bugs in a timely manner. * Collaborate with designers, backend developers, and other team members to integrate frontend and ...

Helios WorldWide

Front End Developer

Santa Monica, CA · On-site +1

$116K - $135K/yr

... and JavaScript. * Debug and troubleshoot issues to identify and resolve bugs in a timely manner. * Collaborate with designers, backend developers, and other team members to integrate frontend and ...

Search Solutions, LLC

Node.js Developer

Los Angeles, CA · On-site

$55.25 - $71.50/hr

Strong back-end experience. Must be comfortable with data modeling concepts, separation of concerns ... Should also have a strong understanding of the JavaScript language, an understanding of creating ...

KBR

Frontend Developer

El Segundo, CA · On-site

$126K - $138K/yr

Expertise in TypeScript and modern JavaScript (ES6+) * Strong experience with HTML5, CSS3/SASS, and ... Strong collaboration skills working with cross-functional teams (backend, DevOps, product) * Local ...

KBR, Inc.

Frontend Developer

El Segundo, CA · On-site

$126K - $138K/yr

Expertise in TypeScript and modern JavaScript (ES6+) * Strong experience with HTML5, CSS3/SASS, and ... Strong collaboration skills working with cross-functional teams (backend, DevOps, product) * Local ...

1 point system

Java Developer

Irvine, CA · On-site

$54.75 - $70.75/hr

Develop backend services and APIs using Java-based frameworks * Build and enhance frontend ... using modern JavaScript frameworks (Vue.js preferred) * Own both development and testing ...

LHi Group Ltd

Senior Frontend Engineer

Los Angeles, CA · On-site

$132K - $181K/yr

You'll work closely with product, design, and backend engineering teams to create polished ... Strong proficiency with JavaScript and/or TypeScript. * Experience building modern web applications ...

New

Lawrence Harvey

Senior Frontend Engineer

Los Angeles, CA · On-site

$120K - $160K/yr

You'll work closely with product, design, and backend engineering teams to create polished ... Strong proficiency with JavaScript and/or TypeScript. * Experience building modern web applications ...

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Showing results 21-40

All JobsJavascript Backend Developer JobsJavascript Backend Developer Jobs in Whittier, CA

Javascript Backend Developer information

See Whittier, CA salary details

$12

$61

$89

How much do javascript backend developer jobs pay per hour?

As of Aug 7, 2026, the average hourly pay for javascript backend developer in Whittier, CA is $61.04, according to ZipRecruiter salary data. Most workers in this role earn between $50.05 and $72.16 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 Whittier, CA? For Javascript Backend Developer jobs in Whittier, CA, the most frequently searched job titles are:
What job categories do people searching Javascript Backend Developer jobs in Whittier, CA look for? The top searched job categories for Javascript Backend Developer jobs in Whittier, CA are:
What cities near Whittier, CA are hiring for Javascript Backend Developer jobs? Cities near Whittier, CA with the most Javascript Backend Developer job openings:
Javascript Backend Developer jobs near you
Infographic showing various Javascript Backend Developer job openings in Whittier, CA as of June 2026, with employment types broken down into 91% Full Time, 5% Part Time, 1% Temporary, and 3% Contract. Highlights an 78% Physical, 4% Hybrid, and 18% Remote job distribution, with an average salary of $126,961 per year, or $61 per hour.

Software Engineer III - Backend

Fluxergy

Irvine, CA

Full-time

Re-posted 17 days ago

Job description

About Us   
 
Fluxergy is a rapidly growing in vitro diagnostics company innovating on the cutting-edge of laboratory testing. We’re developing the first and only multi-modal point-of-care platform that enables molecular, clinical chemistry, immunoassay, and hematology testing on the same system.  
 
Our platform spans many markets including the clinical, veterinary, and food safety industries. We are seeking self-motivated problem solvers who are excited to help decentralize traditional laboratory infrastructure.  
 
At the core of our company’s identity is a strong foundation in engineering. We take great pride in our commitment to critical thinking and pragmatic problem-solving through a modular and systemic perspective. We hold the conviction that transparent communication, coupled with the flexibility to adjust to evolving scenarios and the willingness to venture beyond familiar territories, is crucial to both our success and yours.  
 
Our product: https://vimeo.com/176673475 
 
 
About the Role
 
As a Software Engineer - Backend, you will be part of an expanding Software team and will apply your expertise to design, develop and maintain backend services for our medical device platform. You will have the opportunity to develop Fluxergy’s current software, enhancing its capability, improving security features, and to support system bring up and integration with cross-functional teams. 
 
Specifically, you can be expected to complete the following tasks: 
 
Team culture: 
- Self Driven
- Proactive  
- Great communicator  
- Contribute to a productive team culture
 
What You Will Do
  • Design, develop, and maintain backend applications, APIs, and integrations for our medical device platform, ensuring compliance with relevant medical device regulations and standards.  
  • Lead technical discussions and collaborate with cross-functional teams to define and implement software requirements.  
  • Architect and optimize database systems to store and manage critical medical data securely and efficiently.  
  • Implement robust, scalable, and high-performance solutions using modern software development best practices and technologies.  
  • Participate in and lead code and design reviews, contributing to a culture of continuous improvement and shared learning.  
  • Collaborate with front-end development teams to ensure seamless integration of backend services and APIs.  
  • Support platform development with cross-functional teams. 
  • Mentor junior team members and provide technical guidance as needed.  
  • Create and maintain internal documentation and tools to support development, testing, and compliance efforts. 
  • Stay abreast of industry trends, emerging technologies, and best practices in medical device software development.
  • Actively contribute to a positive, growth-oriented team culture. 
 
What You'll Need to Have
  • 5+ years of experience in Backend Engineering. 
  • 4+ years working with Databases and API design and implementation. 
  • 4+ years of experience developing backend services or applications.  
  • Proficiency in multiple server-side programming languages and frameworks. (Python, Javascript/Typescript, React, etc.)   
  • Proficiency with RESTful APIs and server-side development.   
  • Strong experience with designing and implementing scalable and high-performance systems.  
  • Proficiency with databases, including schema design, query optimization, and performance tuning.  
  • Proficiency with continuous integration and deployment (CI/CD) tools. 
  • Demonstrated ability to lead technical discussions and provide guidance to team members. 
  • Proficiency with version control systems, preferably Git 3 
  • Proficiency with Agile methodologies, such as Scrum or Kanban.   
  • Proficiency with unit testing, working experience with integration and verification testing. 
  • Understanding of backend performance optimization and best coding practices. 
  • Strong communication and collaboration skills, with the ability to work effectively across teams.
  • Proficiency with Linux. 
Strong plus if you:  
  • Has experience in electrical engineering. 
  • Experience with full-stack, firmware development, and board bring up. 
  • Experience working within regulated industries (FDA). 
  • Working knowledge of data security and privacy standards such as HIPAA and GDPR.   
 
Interview Process  
Our interview processes my differ slightly from role-to-role; however, most of our interviews will follow a similar pattern: 
 
- Recruiter Interview  
- Hiring Manager interview  
- Technical Interview
- On-site Interview
- Decision    
 
We are an early-stage company and may change our interview process from time-to-time, but our hope is everyone who interviews with us has a positive experience, even if an offer isn’t presented.  
 
Benefits 
Excellent Medical/Dental Benefits 
- 95% medical benefit premiums paid by Fluxergy and covers employee, partner, and dependents 
- 100% dental and vision premiums paid for employee, partner, and dependents 
- 100% Life Insurance premiums paid for the employee  
 
Work - Life Balance Minded Time Off  
- 15 paid vacation days  
- 2-week paid winter break  
- 7 company paid holidays  
- 5 paid sick days 
 
A Work Culture Which Believes in Promoting from Within
- Wear lots of hats / accelerate your career growth! 
- We are a flat organization by design – lots of visibility!   
- Many of our current leaders started their career with Fluxergy!    
 
Salary Range: $125,000-140,000/yr
 
Additional Information
Fluxergy is an equal opportunity employer. We do not discriminate on the basis of race, color, religion, sex, sexual orientation, gender identity, marital status, age, disability, national or ethnic origin, military service status, citizenship, or other protected characteristic.
 
Fluxergy participates in the E-Verify program. Please click here, here, here for more information.
 
Fluxergy is committed to protecting your personal data. Please review our Privacy Policy.