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Javascript Backend Developer Jobs in Seattle, WA

Staffingine LLC

NET Full Stack Developer

Bellevue, WA · On-site

Web UI Development with Angular functional web interfaces custom HTML CSS JavaScript and ... Backend development and REST API designs Preferred Qualifications * Experience developing in Azure ...

Walmart

Senior, Software Engineer - Web/OL

Bellevue, WA · On-site

$108K - $216K/yr

Leverage your strong hold on Node.js for server-side JavaScript, developing scalable backend ... Experience with cloud-native technologies (GCP/Azure) and DevOps practices. * General Skills:

3B Staffing LLC

Full Stack Java Developer

Sammamish, WA · On-site

$56.75 - $73.25/hr

Onsite Interview Required Java, Spring Boot, Hibernate, ReactJS, Servlet, JSP, MVC, JavaScript ... Build and enhance REST/SOAP APIs and backend services. * Collaborate with offshore development ...

3B Staffing LLC

Full Stack Java Developer

Sammamish, WA

$56.75 - $73.25/hr

Onsite Interview Required Java, Spring Boot, Hibernate, ReactJS, Servlet, JSP, MVC, JavaScript ... Build and enhance REST/SOAP APIs and backend services. * Collaborate with offshore development ...

PamTen Inc

React Developer

Bellevue, WA · On-site

$116K - $135K/yr

React, JavaScript, TypeScript • Strong experience with: Micro Frontends (single-spa, Module ... Backend exposure: Node.js, Express.js • Testing frameworks: Playwright, Cypress, Jest • UI ...

Info Way Solutions

CWE - E2 React Developer

Seattle, WA · On-site

$57 - $74/hr

The role involves collaboration with product, design, and backend teams to deliver reliable, user ... in JavaScript (ES6+), HTML5, and CSS3 • Experience with modern React concepts such as Hooks ...

Microsoft

Principal Software Engineer (CoreAI)

Redmond, WA · On-site

$142K - $274K/yr

... JavaScript, TypeScript, and React * 4+ years of experience in backend service development (APIs, microservices, or distributed systems) OR 4+ years of experience in creating developer platforms (APIs ...

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All JobsJavascript Backend Developer JobsJavascript Backend Developer Jobs in Seattle, WA

Javascript Backend Developer information

See Seattle, WA salary details

$13

$65

$96

How much do javascript backend developer jobs pay per hour?

As of Sep 5, 2026, the average hourly pay for javascript backend developer in Seattle, WA is $65.70, according to ZipRecruiter salary data. Most workers in this role earn between $53.89 and $77.69 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 Seattle, WA?

For Javascript Backend Developer jobs in Seattle, WA, the most frequently searched job titles are:

What job categories do people searching Javascript Backend Developer jobs in Seattle, WA look for?

The top searched job categories for Javascript Backend Developer jobs in Seattle, WA are:

Javascript Backend Developer jobs near you
Infographic showing various Javascript Backend Developer job openings in Seattle, WA as of June 2026, with employment types broken down into 96% Full Time, 2% Part Time, and 2% Contract. Highlights an 78% Physical, 4% Hybrid, and 18% Remote job distribution, with an average salary of $136,661 per year, or $65.7 per hour.

NET Full Stack Developer

Staffingine LLC

Bellevue, WA • On-site

Contractor

Re-posted 3 hours ago

Job description

Job Title: .NET Full Stack Developer
Job Location: Bellevue, WA
Job Type: Contract

Job Description:

  • The developer will design and construct responsive websites andor applications that deliver consistent efficient and intuitive user experiences while achieving business objectives
  • Web UI Development with Angular functional web interfaces custom HTML CSS JavaScript and establishingmaintaining a code repository of reusable interface elements
  • Collaborate on the design and implementation of reusable web UI components Integrate UI components with REST web services when applicable
  • Gather and evaluate user requirements in collaboration with customers program managers andor team colleagues Illustrate design ideas using storyboards process flows prototypes and sitemaps
  • Detail design of the E2E solution Utilize reference architecture in project design work
  • Collaborate on the design and implementation of reusable web UI components
  • Responsible for UX design guidelines like accessibility layouts and responsive design principles
  • Backend development and REST API designs

Preferred Qualifications

  • Experience developing in Azure CNet SQL Server Azure SQL Cosmos DB Azure Data Lake SSIS SSMS
  • Proficient in Application Services Development in Net Technologies
  • platform would be ideal but this can be a learning with a strong foundation on net platform engineering skills
  • Strong middle tier development with APIs web services JSON
  • Power BI experience is a plus
  • Very strong software engineering design development testing deployment and care experience
  • Good understanding of design architectural patterns and automation platforms
  • Angular Custom HTML CSS JavaScript
  • Experience in designing developing and shipping high quality software
  • Debugging and Troubleshooting experiences
  • Highly effective communication and collaboration
  • Maturity and discipline in applying good engineering practices
  • Web application frameworks Angular2 ASPNET TypeScript Performance tuning
  • The ability to wear many hats learn quickly and change direction when needed

Mandatory Skills:

Express, Angular, HTML/HTML5,AngularJS, JavaScript, MongoDB ,MS SQL Server,Node.js,React,.Net Core,Mocha,.NET Core WebAPI (Using MVC Core),ASP.NET MVC, Azure App Service