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Javascript Backend Developer Jobs in Seattle, WA

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 ...

RIT Solutions, Inc.

SAP ABAP/UI Developer

Seattle, WA · On-site

$70 - $94.75/hr

... back-end systems. • Configure and develop SAP UI5/Fiori applications, including Fiori Elements and UI5-related programming (JavaScript, HTML5, CSS). • Build and debug OData services, CDS data ...

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 ...

krg technology inc

WEb developer

Redmond, WA

... backend capabilities including WebAPIs and personalization support 5. Closely working with the ... NET Framework 9. 3+ years of experience with HTML5, JavaScript, and CSS/LESS 10. 2+ years of ...

3B Staffing LLC

.Net Full Stack Developer

Seattle, WA · On-site

Title: .Net Full Stack Developer Location: Seattle, WA Duration: Fulltime Must Have Technical ... NET on the backend and modern JavaScript frameworks on the frontend. * Build and consume REST APIs ...

3B Staffing LLC

.Net Full Stack Developer

Seattle, WA · On-site

Title: .Net Full Stack Developer Location: Seattle, WA Duration: Fulltime Must Have Technical ... NET on the backend and modern JavaScript frameworks on the frontend. * Build and consume REST APIs ...

PROLIM Global Corporation

React developer

Seattle, WA · On-site

Expertise in Node.js with Express.js or similar backend frameworks. Solid experience with ... Strong understanding of JavaScript/TypeScript and ES6 features. Experience building and consuming ...

Anduril Industries

UI Engineer, Lattice C2

Seattle, WA

$118K - $158K/yr

Experience building production web applications in JavaScript or TypeScript (we use TypeScript, React, and RxJS) * Proficiency with modern backend programming languages such as C++, Rust, or Golang.

Microsoft

Senior Software Engineer

Redmond, WA · On-site

$160K - $261K/yr

Designs, implements, debugs, refactors, and optimizes backend services, APIs, and distributed ... Full-stack development experience with modern frontend on Web & Mobile such as JavaScript ...

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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.

Full Stack engineer (React & Backend with AWS) - R01570524

Brillio

Seattle, WA

$110K - $130K/yr

Full-time

Posted 2 days ago

New

Job description

Primary Skills
ReactJS , JAVA/ Node.js / Go or Python and AWS
Job requirements
About the job

About Brillio:

Brillio is one of the fastest growing digital technology service providers and a partner of choice for many Fortune 1000 companies seeking to turn disruption into a competitive advantage through innovative digital adoption. Brillio, renowned for its world-class professionals, referred to as "Brillians", distinguishes itself through their capacity to seamlessly integrate cutting-edge digital and design thinking skills with an unwavering dedication to client satisfaction.

Brillio takes pride in its status as an employer of choice, consistently attracting the most exceptional and talented individuals due to its unwavering emphasis on contemporary, groundbreaking technologies, and exclusive digital projects. Brillio's relentless commitment to providing an exceptional experience to its Brillians and nurturing their full potential consistently garners them the Great Place to Work® certification year after year.

Role: - Full Stack Developer (React, Golang, Python, Java, Node.js, AWS)

Locations: Madison, NJ/Manhattan, \u007C Greater Boston Area \u007CSouth Florida Area \u007C Greater Seattle Area 

Full-Time (Hybrid -3days)

Note: - This is a permanent hire. No Visa sponsorship is available for this role 

Job Summary
We are looking for a highly skilled Senior Full Stack Engineer to design, build, and scale customer-facing technology platforms. This role requires strong hands-on expertise across frontend and backend engineering, with the ability to deliver end-to-end solutions using modern web technologies, cloud-native services, APIs, microservices, and distributed systems. The ideal candidate brings strong engineering fundamentals, a product mindset, and the ability to independently solve complex technical problems in a collaborative, fast-paced environment.

Key Responsibilities

  • Design, build, and maintain scalable full-stack applications end to end — from frontend UI to backend services, APIs, and databases — using React, TypeScript, Go, Java, Python, and Node.js.
  • Build and enhance RESTful APIs, gRPC/Thrift integrations, microservices, and distributed systems supporting business-critical workflows.
  • Participate in architecture reviews, technical design discussions, and code reviews; drive engineering practices across coding standards, automated testing (incl. Cypress UI regression), security, observability, and CI/CD.
  • Troubleshoot complex production issues and drive improvements to reliability, performance, and user experience.
  • Contribute to cloud infrastructure and deployment automation across AWS-based environments.
  • Mentor junior and mid-level engineers, and collaborate closely with product managers, architects, and designers to deliver high-quality software.
  • Communicate technical decisions, risks, and trade-offs clearly to stakeholders and team members.

Required Skills & Experience

Technical Experience

  • Bachelor's degree in computer science, Software Engineering, or equivalent practical experience, with 5+ years of hands-on, production-grade full-stack experience.
  • Strong frontend (ReactJS, TypeScript, JavaScript, hooks, reusable UI components) and backend (Go, Java, Python, or Node.js) development building APIs, services, and integrations (REST, gRPC, Thrift; Koa).
  • Solid understanding of system design, distributed systems, scalability, and performance optimization.
  • Working knowledge of relational (PostgreSQL, MySQL, Aurora, RDS) and non-relational (MongoDB, DocumentDB, DynamoDB, Redis) databases.
  • Hands-on AWS experience (ECS, Lambda, API Gateway, S3, CloudWatch, and similar services).
  • Experience with Docker, CI/CD (CircleCI), Terraform, and modern DevOps practices.
  • Experience writing unit, integration, and UI tests (Jest, Cypress, or similar).
  • Agile/Scrum delivery experience with strong ownership across distributed, cross-time-zone teams.
  • Familiarity with AI-assisted engineering tools (Gemini, Claude Code, GitHub Copilot) to boost productivity and code quality.

Professional Skills

  • Proven ability to independently own and deliver complex technical initiatives.
  • Experience collaborating effectively within distributed and agile teams.
  • Strong analytical and problem-solving skills.
  • Excellent communication and stakeholder management abilities.
  • Experience mentoring engineers and driving technical excellence across teams.

Nice to Have Skills

  • Experience with Elasticsearch for search, analytics, and large-scale data retrieval.
  • Knowledge of Thrift or similar RPC frameworks for service-to-service communication.
  • Experience working within monorepo environments and large-scale frontend codebases.
  • Familiarity with Bazel build systems.
  • Infrastructure-as-Code experience using Terraform, AWS CDK, or CloudFormation.
  • Experience contributing to shared UI component libraries and enterprise design systems.
  • Exposure to event-driven architectures and messaging technologies such as Kafka or AWS Event Bridge.
  • Experience in real estate technology, marketplace platforms, or customer-facing SaaS products.

Know more about Brillio : https://www.brillio.com/join-us/

PPE: https://www.brillio.com/platform-and-product-engineering/

Equal Employment Opportunity Declaration

Brillio is an equal opportunity employer to all, regardless of age, ancestry, colour, disability (mental and physical), exercising the right to family care and medical leave, gender, gender expression, gender identity, genetic information, marital status, medical condition, military or veteran status, national origin, political affiliation, race, religious creed, sex (includes pregnancy, childbirth, breastfeeding, and related medical conditions), and sexual orientation.

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.