Senior Full Stack Software Engineer (TS/SCI)

Integrate•Seattle, WA

1d•Onsite

About The Position

Integrate is seeking a Senior Full Stack Software Engineer to join their Seattle-based team. The company builds multiplayer project management software for complex deep tech projects, focusing on areas like rocket launches and advanced manufacturing. This role is crucial for evolving the product layer of Integrate's platform, spanning the full stack from React UI to Go APIs and integrations. The engineer will work on features for cross-domain solution workflows, improving data presentation to users, and contributing to API and integration services. A significant aspect of this role involves operating with a Top Secret clearance, as the platform supports programs across various classification levels. The company emphasizes a culture where engineers own what they build.

Requirements

3–5+ years of full stack engineering experience in a product-focused environment
Strong React fundamentals — component architecture, state management, and performance
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
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)

Nice To Haves

Apollo Client familiarity is a plus
Bonus if you've worked with complex or graph-structured data models
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
If you're lapsed, tell us where you left off and we'll talk.

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