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Freelance Full Stack Software Developer Jobs in Seattle, WA

What you'll do As a Senior Full-Stack Software Engineer on our Task Workflows Platform team, you ... Experience and interest in leveraging AI developer tools Compensation The expected salary range for ...

Full Stack .NET Developer with Telecom Domain Location : Seattle, WA Duration : 6+ Months Minimum ... NET and Web application experience working as a professional software developer using programming ...

The Senior Software Engineer, Full Stack will design, develop, and operate full-stack applications ... DevOps best practices, using version control (Git), CI/CD (e.g., Buildkite, GitHub Actions), and ...

Senior Full-Stack Software Engineer Role Overview We are seeking a Senior Full-Stack Software Engineer to serve as a subject matter expert within our scrum-based delivery team. You will be ...

What you'll do As a Senior Full-Stack Software Engineer on our Task Workflows Platform team, you ... Experience and interest in leveraging AI developer tools Compensation The expected salary range for ...

Senior Engineer (Full Stack)

Seattle, WA · On-site

$140K - $225K/yr

Software Engineer (Senior, Full Stack) About AZX Our mission is to accelerate positive impact in critical industries through AI transformation. We're growing quickly and already work with category ...

Requirements * 7+ years of professional software engineering experience, including significant delivery of both backend services and frontend applications. * Bachelor's or Master's degree in Computer ...

Showing results 41-60

Freelance Full Stack Software Developer information

See Seattle, WA salary details

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How much do freelance full stack software developer jobs pay per hour?

As of Aug 24, 2026, the average hourly pay for freelance full stack software developer in Seattle, WA is $67.44, according to ZipRecruiter salary data. Most workers in this role earn between $56.06 and $77.69 per hour, depending on experience, location, and employer.

What are the most commonly searched types of Full Stack Software Developer jobs in Seattle, WA?

The most popular types of Full Stack Software Developer jobs in Seattle, WA are:

Infographic showing various Freelance Full Stack Software Developer job openings in Seattle, WA as of August 2026, with employment types broken down into 88% Full Time, 8% Part Time, and 4% Contract. Highlights an 88% Physical, 3% Hybrid, and 9% Remote job distribution, with an average salary of $140,275 per year, or $67.4 per hour.

Senior Full Stack Software Engineer (TS/SCI)

Integrate

Seattle, WA • On-site

Full-time

Re-posted 11 days ago


Job description

Job Summary:
Integrate is a Seattle-based company focused on building multiplayer project management software for advanced manufacturing and defense sectors. They are seeking a Senior Full Stack Software Engineer to contribute to the development of their platform, which involves working on both the frontend and backend, ensuring effective collaboration and communication of complex project data.
Responsibilities:
• Build and iterate on React-based UI surfaces that make complex project workflows legible and fast for end users
• Design and maintain REST APIs and GraphQL layers in Go, working across internal and external consumers
• Own and evolve data models in PostgreSQL — schema design, query optimization, and migration management
• Contribute to our GraphQL integration layer, ensuring resolvers are well-structured and performant
• Build and maintain integration services in Go that connect internal systems and external APIs, owning the full contract from interface design to error handling and observability.
• Write and maintain CI/CD pipelines using GitHub Actions including build, test, and deployment stages across environments.
• Ship clean, tested, maintainable code across the stack — and leave things better than you found them
Qualifications:
Required:
• 3–5+ years of full stack engineering experience in a product-focused environment
• Strong React fundamentals — component architecture, state management, and performance; Apollo Client familiarity is a plus
• Solid HTML5 and CSS3; able to build clean, responsive interfaces without leaning on a framework crutch
• Go on the backend — REST API development, middleware, and service patterns
• PostgreSQL — comfortable with schema design, query writing, and migrations
• GraphQL — can read and reason about a resolver, understands n+1 patterns and common pitfalls; bonus if you've worked with complex or graph-structured data models
• Familiarity with integration patterns — webhooks, third-party API design, or similar
• Some exposure to broader backend concerns: caching, rate limiting, or async processing
• GitHub Actions or similar CI/CD tooling
• Active TS or TS/SCI clearance
• US person status (including US citizens, U.S. permanent residents, individuals granted U.S. asylum status, or individuals admitted in U.S. refugee status)
Preferred:
• Background in B2B SaaS, defense tech, or complex enterprise environments is a plus
• Comfort working in a product and architecture that's still taking shape
Company:
Ultra-secure project management platform ensuring project integrity with a single real-time source of truth across organizations. Founded in 2022, the company is headquartered in Seattle, USA, with a team of 11-50 employees. The company is currently Early Stage.