Top Senior Full-Stack Engineer Jobs in Seattle, WA

The Senior Full-Stack Engineer will develop new features and improve existing functionality, collaborate with the product team, and resolve bugs while influencing architectural decisions.

As a Senior Fullstack Engineer, you'll develop a no-code platform, build UIs and backend services, and improve conversation analysis workflows using AI technologies.

The Senior Fullstack Engineer will lead projects, mentor engineers, and build user-facing SaaS products using React, TypeScript, Node.js, GraphQL, and MongoDB, focusing on team collaboration and effective trade-off decision-making.

As a Fullstack AI Engineer, you will design and develop scalable applications, integrating AI solutions and collaborating with the CTO in a startup environment.

As a Senior Full Stack Engineer, you will design and build cloud-native applications, focus on performance and scalability, and ensure platform stability while collaborating with product teams.

As a Senior Full Stack Engineer, you will design and implement systems and tools to support Sales and Customer Success, improving efficiency and user experience while ensuring system reliability and scalability.

The Senior Full Stack Engineer will design and implement APIs with NodeJS, develop UIs with React, manage data pipelines, and deploy projects on AWS.

As a Senior Full Stack Engineer, you will design and develop trading platforms, create high-performance UIs, and mentor client engineering teams.

As a Senior Full Stack Engineer, you will design and implement features, maintain systems, and ensure performance in a fintech environment, collaborating with cross-functional teams.

Design, develop, and deliver fullstack web solutions, optimize platforms, mentor engineers, and manage product features from ideation to launch.

The Senior Fullstack Engineer will build fullstack features for Real User Monitoring, working with backend services, APIs, and frontend visuals. Responsibilities include designing data ingestion systems, optimizing queries, and collaborating with SDK engineers to enhance user experience. Candidates should have strong backend and frontend expertise, particularly in high-volume data systems.

The Senior Full-Stack Engineer at SafeRide Health will develop and maintain healthcare applications, ensuring high performance and security while collaborating with cross-functional teams in an agile setting.

The Senior Full-Stack Engineer will develop claims monitoring tools and backend services, collaborate with other engineers, and influence the product architecture in a health insurance startup.

As a Senior Full-Stack Engineer, you will develop and improve features for a digital clinic, ensuring quality patient care and software reliability across the stack including React and NestJS.

The Senior Full Stack Developer will build end-to-end solutions, collaborate in a remote environment, and write technical documentation. The role requires expertise in Ruby on Rails and various programming paradigms.

The role involves building web applications and APIs for blockchain-based investment products, optimizing front-end performance, and collaborating cross-functionally while maintaining technical excellence.

As a Senior Full-Stack Engineer, lead development of secure AI-driven SaaS applications, focusing on backend architecture, frontend design, and AI integrations. Collaborate with teams to operationalize models and enhance application functionality through cutting-edge AI solutions.

Design, implement, and deliver high-quality, performant frontend interfaces. Collaborate with cross-functional teams, optimize for SEO and user experience, and mentor junior engineers.

The Senior Frontend Engineer will enhance Slate's brand management experience by building UI systems, integrating brand assets, ensuring reliability, writing maintainable code, and mentoring junior engineers.

The Senior Backend Engineer will design and build backend systems for real-time collaboration, focusing on performance, reliability, and team workflows while improving existing infrastructure and contributing to architectural decisions.

The Senior Full Stack Engineer will develop backend services in .NET, build frontend applications in React, and optimize databases while managing cloud-native infrastructures.

Design and build agent-powered mission consoles, collaborate with stakeholders to improve user workflows, and maintain agentic workflows for mission outcomes.

As a Senior Software Engineer, you will design and build a cutting-edge identity search platform and implement AI systems for defense applications, working closely with cross-functional teams to enhance user workflows and support national security.

Responsible for defining and building user experiences across the full stack, leading both frontend and backend architecture, mentoring engineers, and ensuring product scalability.

As a Full Stack Engineer, you will lead innovative software projects for freight logistics, driving technical vision, mentoring others, and delivering scalable solutions across platforms.