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Javascript Backend Developer Jobs in Seattle, WA

Sparktek

SAP BTP-UI5 Senior Developer

Seattle, WA · On-site

Work closely with business analysts, UX/UI designers, and backend developers to confirm ... Proficiency in JavaScript or Groovy script. * Knowledge of various integration protocols and ...

Rune Technologies

Front End Engineer

Seattle, WA · On-site

... modern JavaScript. • Own front-end architecture decisions, establishing scalable patterns ... backend engineers, and military subject matter experts to translate mission requirements into high ...

AceStack LLC

.Net Full Stack Developer

Seattle, WA · On-site

Role : .Net Full Stack Developer Location: Seattle, WA FTE Must Have Technical/Functional Skills ... NET on the backend and modern JavaScript frameworks on the frontend. • Build and consume REST ...

BizTech Fusion

.Net Full Stack Developer

Seattle, WA · On-site

Title: .Net Full Stack Developer Location: Seattle, WA/ Onsite Duration: Full Time Experience ... NET on the backend and modern JavaScript frameworks on the frontend. • Build and consume REST ...

New

Diverse Lynx

Reactive Programming | NodeJS

Bellevue, WA · On-site

$65/hr

... Stack Developer with strong expertise in Angular and Node.js to design, develop, and maintain ... Angular (latest versions), TypeScript, JavaScript (ES6+), HTML5, CSS3 * Backend: Node.js, REST APIs

Vish Consulting IT

React Native Developer

Seattle, WA · On-site

The ideal candidate has strong experience in JavaScript/TypeScript, understands mobile UI/UX ... Work closely with product managers, designers, and backend teams to deliver features end‑to‑end.

The AES Group

Front End Developer

Seattle, WA · Remote

$106K - $123K/yr

Implement RESTful APIs, WebSockets, and GraphQL to communicate with back-end services. * Leverage ... Strong experience with TypeScript, JavaScript (ES6+), HTML5, CSS3, and SCSS/SASS. * Hands-on ...

Diverse Lynx

UI/ Java Full Stack Developer

Seattle, WA · On-site

$59.75 - $77.25/hr

JavaScript is the top required skill. You will build modern, responsive web experiences and ... Highly desirable: contribute to backend development using Java and Spring (e.g., Spring Boot) to ...

AceStack LLC

.Net Full Stack Developer

Bellevue, WA · On-site

JavaScript; C# 5.0; Digital : ReactJS; Digital : Microsoft Azure; Gen AI, ReactJS Roles ... backend components (Azure functions or equivalent). Good to have Accessibility remediation ...

Diverse Lynx

Java Fullstack developer with UI

Seattle, WA · On-site

$95K - $125K/yr

JavaScript is the top required skill. You will build modern, responsive web experiences and ... Highly desirable: contribute to backend development using Java and Spring (e.g., Spring Boot) to ...

iFlow Inc

Frontend Developer-React

Redmond, WA · On-site

$116K - $135K/yr

Responsibilities Develop and maintain front-end features using React, TypeScript, JavaScript, HTML ... Integrate UI components with backend services and REST APIs. Implement privacy, cookie, and user ...

Wallero

Fullstack Developer

Redmond, WA · On-site

Title: Full-Stack Developer (Azure) Location: Redmond, WA (Hybrid/Onsite as required) Job type ... JavaScript/TypeScript. * Strong back-end experience with .NET / .NET Core, C#, Node.js.

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

Javascript Backend Developer information

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$65

$96

How much do javascript backend developer jobs pay per hour?

As of Jun 27, 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.

Which pays more, JavaScript or Python?

For a JavaScript Backend Developer, Python developers often have higher average salaries due to demand in data science, machine learning, and backend development. However, salary differences depend on experience, location, and industry, with both skills being highly valued in tech roles.

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.

Can I learn backend in 6 months?

A JavaScript Backend Developer can acquire foundational backend skills in about 6 months with consistent study, focusing on server-side frameworks like Node.js, databases, and APIs. However, mastering complex systems and gaining real-world experience typically requires ongoing learning beyond this timeframe.

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.

Is JavaScript good for backend development?

JavaScript is widely used for backend development through environments like Node.js, allowing developers to build scalable server-side applications using a single language. It offers a large ecosystem of libraries and frameworks, making it a popular choice for full-stack developers. Knowledge of asynchronous programming and server management is beneficial for backend roles involving JavaScript.

What is the salary of a JavaScript beginner?

The salary of a JavaScript beginner typically ranges from $50,000 to $70,000 annually, depending on location, education, and prior experience. Entry-level JavaScript developers often start with basic skills in front-end or back-end frameworks and may earn less in regions with lower living costs.
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:
What cities near Seattle, WA are hiring for Javascript Backend Developer jobs? Cities near Seattle, WA with the most Javascript Backend Developer job openings:
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.

SAP BTP-UI5 Senior Developer

Sparktek

Seattle, WA • On-site

Other

Posted 4 days ago

Job description

SAP BTP-UI5 Senior Developer

Location: Seattle, WA (Hybrid)

Duration: 18 Months

Job Responsibilities
  • Design, develop, and maintain responsive web applications using SAP UI5 on SAP Business Technology Platform (BTP), ensuring adherence to SAP best practices for performance, usability, and accessibility as well as ITD practices and guidelines.
  • Develop high-quality code and associated documentation, while conducting quality assurance techniques such as peer code reviews.
  • Optimize performance and user experience, while also ensuring compatibility across various devices and browsers.
  • Provide comprehensive SAP support, including analysis, development, testing, tracking, and resolution of issues.
  • Offer technical expertise for system design, implementation, and support, collaborating with SAP Functional Analysts to define acceptance criteria for business requirements (user stories).
  • Work closely with business analysts, UX/UI designers, and backend developers to confirm requirements, create prototypes, and integrate UI5 applications with SAP backend services and APIs.
  • Assess the impact of new requirements on an existing suite of complex applications.
  • Assist in resolving production support incidents, suggesting alternative approaches as necessary.
  • Stay updated on SAP cloud development best practices and standards to ensure the delivery of high-quality solutions.
  • Availability for periodic evening and weekend work as project demands require.
Requirements and Qualifications
  • 10+ years of experience in software development domain.
  • 5+ years of hands-on experience in UI5 and SAP-BTP in multi-modular and multi-system SAP implementations.
  • 2+ full lifecycles SAP S4/HANA implementations.
  • SAP Cloud developer certifications is a must.
  • Familiarity with Agile Software Development methodologies.
  • Strong understanding of SAP architecture and integration patterns.
  • Proficiency in JavaScript or Groovy script.
  • Knowledge of various integration protocols and technologies, such as REST, SOAP, OData, IDoc, RFC, XML, and JSON.
  • Knowledge of cloud platforms, such as AWS, Azure, or GCP, and their integration capabilities with SAP systems.
  • Experience in the SAP ABAP programming language is a plus.
  • Experience in SAP CPI is a plus.
  • Excellent communication and problem-solving skills, with the capability to prioritize tasks and support multiple project teams simultaneously.
  • Demonstrated ability to work independently and deliver high-quality results within project deadlines.
  • Experience with test automation tools is a plus.

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