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Senior Javascript Developer Jobs in Seattle, WA (NOW HIRING)

Microsoft

Senior Software Engineer

Redmond, WA · On-site

$137K - $180K/yr

... C++, C#, Java, JavaScript, or Python * OR equivalent experience. * Senior/Lead Engineer ... professional software development experience with at least two of the following C#/C++/Java, AS ...

Databricks

Senior Software Engineer - Fullstack

Seattle, WA · On-site

$139K - $183K/yr

The Senior Full Stack Software Engineer will work collaboratively to create user-friendly data ... Required : • 5+ years of experience with HTML, CSS, and JavaScript. • Passion for user ...

Microsoft

Senior Software Engineer

Redmond, WA · On-site

$137K - $180K/yr

As a Senior Software Engineer, you will build and operate large-scale distributed systems that ... Java, JavaScript, or Python * OR equivalent experience. Other Requirements: Ability to meet ...

Microsoft

Senior Software Engineer

Redmond, WA · On-site

$158K - $258K/yr

As a Senior Software Engineer, you will play a key role in driving our data strategy, ensuring the ... Java, JavaScript, or Python * OR equivalent experience. Other Requirements: Ability to meet ...

Microsoft

Senior Software Engineer

Redmond, WA · On-site

$160K - $261K/yr

The Edge Web Platform team is looking for an exceptional Senior Software Engineer to join our ... JavaScript, or Python * OR equivalent experience. Preferred Qualifications: * Master's Degree in ...

Microsoft

Senior Software Engineer

Redmond, WA · On-site

$119K - $234K/yr

... scalable developer experiences that accelerate innovation while maintaining Microsoft's high ... JavaScript, or Python * OR equivalent experience. Preferred Qualifications: * Master's Degree in ...

Microsoft

Senior Software Engineer

Redmond, WA · On-site

$160K - $261K/yr

Overview The M365 AIForward team is dedicated to raising developer productivity and reducing toil ... Java, JavaScript, or Python * OR equivalent experience. Other Requirements: Ability to meet ...

Uw

Senior Systems Engineer

Seattle, WA · On-site

$118K - $162K/yr

Experience with DevOps practices including testing, continuous integration, and monitoring ... Experience with Javascript frameworks like Angular or React. * Experience with IAM technologies ...

University of Washington

Senior Systems Engineer

Seattle, WA · On-site

$118K - $162K/yr

Experience with DevOps practices including testing, continuous integration, and monitoring ... Experience with Javascript frameworks like Angular or React. * Experience with IAM technologies ...

Collabera

Sr Application Developer

Seattle, WA

$109K - $150K/yr

Preferred Qualifications Hands on experience with AngularJS, NodeJs and other Javascript frameworks ... Familiarity with programming languages - PHP, Java, C# etc Working knowledge of SQL and various ...

Microsoft

Senior Software Engineer

Redmond, WA · On-site

$137K - $180K/yr

We are looking for a Senior Software Engineer who is passionate about securing AI-powered systems ... Java, JavaScript, or Python * OR equivalent experience. Other Requirements: Ability to meet ...

SpangleAI

Senior Fullstack Engineer

Bellevue, WA · On-site

$138K - $182K/yr

Design and implement reusable, distributed JavaScript/CSS SDK frameworks that enable seamless ... Familiarity with cloud infrastructure (AWS or GCP) and modern DevOps practices * Strong ...

Blue Origin

Senior Software Development Engineer

Seattle, WA · On-site

$139K - $183K/yr

Senior Software Development Engineer The Developer Platforms team builds and operates the tools and ... Go, Python, JavaScript * Experience with CI/CD systems, build pipelines, and developer tooling

Protingent

Senior Software Engineer

Bellevue, WA · On-site

$56 - $95/hr

Senior Software Engineer Position Description: Protingent Staffing has an exciting contract Senior ... Advanced programming skills in Python and JavaScript. * 3+ years in-depth experience and expertise ...

Microsoft

Senior Software Engineer

Redmond, WA · On-site

$137K - $180K/yr

As a Senior Software Engineer, you will design, build, and operate large-scale distributed systems ... Java, JavaScript, or Python * OR equivalent experience. Other Requirements: Ability to meet ...

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Senior Javascript Developer information

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How much do senior javascript developer jobs pay per hour?

As of Aug 10, 2026, the average hourly pay for senior javascript developer in Seattle, WA is $68.74, according to ZipRecruiter salary data. Most workers in this role earn between $61.54 and $78.22 per hour, depending on experience, location, and employer.

What is a senior JavaScript developer?

A Senior JavaScript Developer is a highly experienced programmer specializing in JavaScript, including frameworks like React, Angular, or Node.js. They are responsible for designing, developing, and optimizing web applications, ensuring high performance and maintainability. Additionally, they provide technical leadership, mentor junior developers, and collaborate with cross-functional teams to deliver scalable solutions. Strong problem-solving skills, deep knowledge of JavaScript best practices, and experience with modern development tools are essential for this role.

What are typical challenges faced by senior JavaScript developers in day-to-day work?

Senior Javascript Developers often encounter complex challenges such as optimizing web application performance, ensuring code scalability and maintainability, and integrating with diverse APIs and services. They are also expected to troubleshoot legacy code and address security vulnerabilities, all while keeping up with the rapidly evolving JavaScript ecosystem. Collaborating with designers, product managers, and junior developers can add layers of complexity to project requirements. However, overcoming these challenges is rewarding and provides opportunities to shape technical strategy and influence best practices within the team.

What are the key skills and qualifications needed to thrive as a senior JavaScript developer?

To thrive as a Senior Javascript Developer, a strong command of JavaScript (including ES6+), advanced front-end frameworks (like React, Angular, or Vue), and back-end technologies (such as Node.js) are essential, along with several years of professional coding experience. Familiarity with version control systems (like Git), CI/CD pipelines, and relevant certifications (e.g., AWS Certified Developer or JavaScript certifications) is highly valued. Excellent problem-solving abilities, mentorship skills, and effective communication help developers collaborate and lead within cross-functional teams. These skills enable Senior Javascript Developers to build robust applications, guide junior team members, and drive innovation in fast-paced tech environments.

What are the most commonly searched types of Javascript Developer jobs in Seattle, WA? The most popular types of Javascript Developer jobs in Seattle, WA are:
What are popular job titles related to Senior Javascript Developer jobs in Seattle, WA? For Senior Javascript Developer jobs in Seattle, WA, the most frequently searched job titles are:
What job categories do people searching Senior Javascript Developer jobs in Seattle, WA look for? The top searched job categories for Senior Javascript Developer jobs in Seattle, WA are:
What cities near Seattle, WA are hiring for Senior Javascript Developer jobs? Cities near Seattle, WA with the most Senior Javascript Developer job openings:
Senior Javascript Developer jobs near you
Infographic showing various Senior Javascript Developer job openings in Seattle, WA as of August 2026, with employment types broken down into 80% Full Time, 5% Part Time, and 15% Contract. Highlights an 83% Physical, 5% Hybrid, and 12% Remote job distribution, with an average salary of $142,984 per year, or $68.7 per hour.

Senior Software Engineer

Microsoft

Redmond, WA • On-site

$137K - $180K/yr

Full-time

Re-posted 8 hours ago

Microsoft rating

8.5

Company rating: 8.5 out of 10

Based on 132 frontline employees who took The Breakroom Quiz

78th of 242 rated software companies

Job description

Overview
We are on an ambitious mission to reshape the way enterprise data is indexed, understood, and served in the era of Large Language Models (LLMs). Our team is at the forefront of innovation, building the Semantic Fabric, a breakthrough technology that provides a semantic index for enterprise data within M365. This platform delivers the most relevant grounding data from a wide range of sources across an organization, such as documents, relevant Teams messages, connector data and emails. Seamlessly integrated with LLMs, this work drives Microsoft's future in the AI age, empowering Copilot to identify and utilize the best content for any task, enabling deep reasoning based on a rich representation of all enterprise data.
We are looking for a talented Senior Software Engineer to join us in pushing the boundaries of technology for the Copilot experience. In this role, you will work on building highly scalable ingestion pipelines and indexing solutions at an exabyte scale, ensuring interactive freshness and low-latency access to the best grounding data across enterprise content. Your work will directly impact users across the globe, making Copilot smarter and more responsive by ensuring it can deliver the right data for any enterprise scenario.
Microsoft's mission is to empower every person and every organization on the planet to achieve more. As employees we come together with a growth mindset, innovate to empower others, and collaborate to realize our shared goals. Each day we build on our values of respect, integrity, and accountability to create a culture of inclusion where everyone can thrive at work and beyond.
Responsibilities
As a Software Engineer on the Semantic Fabric Team, you will be entrusted with a range of responsibilities that are key to the successful development and evolution of our cutting-edge technology platform. Your responsibilities will include:
  • Participate in the development of the Semantic Fabric, a cutting-edge technology delivering semantic indexing and search experiences across Microsoft Office 365.
  • Build scalable, high-performance software services over large datasets with low latency and high availability.
  • Ensure the platform adheres to Microsoft's strict data privacy and compliance standards.
  • Participate in design, development, testing, deployment, and maintenance of software solutions to meet the functional and non-functional requirements of the Semantic Fabric.
  • Collaborate with team members and other engineering teams to ensure the successful integration of individual components into the larger system.
  • Realize architectural discussions and decisions, carry out selected technologies, design scalable and sustainable solutions, and plan for future growth.
  • Proactively identify technical debt and other issues impacting the performance or reliability of the software and devising solutions.
  • Constantly stay informed about the latest developments in the LLM and semantic search field and identify opportunities to apply new methods or technologies to improve the Semantic Fabric.
  • Take part in code reviews, both as a reviewer and a reviewee, to ensure the quality of the software and promote best practices within the team.
  • Engage with stakeholders, including team members, other teams, and customers, to gather feedback and ensure the software meets their needs.
  • Ensure the software complies with Microsoft's security and privacy standards.

Identify risks that could impact the delivery of the software, and take action to mitigate these risks.
Qualifications
Required Qualifications:
  • Bachelor's Degree in Computer Science or related technical field AND 4+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python
    • OR equivalent experience.

Preferred Qualifications:
  • Master's Degree in Computer Science or related technical field AND 6+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python
    • OR Bachelor's Degree in Computer Science or related technical field AND 8+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python
    • OR equivalent experience.
  • Senior/Lead Engineer professional software development experience with at least two of the following C#/C++/Java, ASP.NET, and RUST
  • Hands on experience with distributed systems and services in the cloud.
  • Knowledge of functional programming principles, including immutability and type safety.
  • Proven ability to tackle complex technical issues, proper research and design and high-quality implementations.
  • Great written and verbal communication skills in English.
  • Solid pattern matching against proven software patterns (such as Mediator, Strategy, Middleware).
  • Track record of delivering impact at scale.
  • Search, information retrieval systems.
  • Applications of LLM and/or vector indexes (such as DiskANN)
  • Designing, developing and shipping high quality software products, systems and services.
  • Working collaboratively in a team: ability to communicate ideas clearly and drive problems to efficient resolution.

Software Engineering IC4 - The typical base pay range for this role across the U.S. is USD $119,800 - $234,700 per year. There is a different range applicable to specific work locations, within the San Francisco Bay area and New York City metropolitan area, and the base pay range for this role in those locations is USD $160,200 - $261,000 per year.
Certain roles may be eligible for benefits and other compensation. Find additional benefits and pay information here:
https://careers.microsoft.com/us/en/us-corporate-pay
This position will be open for a minimum of 5 days, with applications accepted on an ongoing basis until the position is filled.
Microsoft is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to age, ancestry, citizenship, color, family or medical care leave, gender identity or expression, genetic information, immigration status, marital status, medical condition, national origin, physical or mental disability, political affiliation, protected veteran or military status, race, ethnicity, religion, sex (including pregnancy), sexual orientation, or any other characteristic protected by applicable local laws, regulations and ordinances. If you need assistance with religious accommodations and/or a reasonable accommodation due to a disability during the application process, read more about requesting accommodations.

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About Microsoft

Sourced by ZipRecruiter

Our infrastructure is comprised of a large global portfolio of more than 100 datacenters and 1 million servers. Our foundation is built upon and managed by a team of subject matter experts working to support services for more than 1 billion customers and 20 million businesses in over 90 countries worldwide. With environmental sustainability and optimization at the forefront of our datacenter design and operations, we continue to grow and evolve as we meet the ever-changing business demands that hold Microsoft as a world-class cloud provider.

Industry

Computer and computer peripheral equipment and software wholesalers

Company size

10,000+ Employees

Headquarters location

Redmond, WA, US

Year founded

1975

Social media

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