Top Full-Stack Engineer Jobs in Seattle, WA

Develop and maintain technology solutions, lead complex projects, consult junior staff, analyze client requirements, and oversee project deliverables for compliance.

The role involves solving complex technical problems as a full-stack engineer, optimizing front-end performance, and collaborating closely with designers to enhance user experiences. Responsibilities include code and design reviews, documentation, and a strong emphasis on accessibility and using AI tools to improve workflows.

Own and deliver end-to-end product features across frontend, backend, and data pipelines. Ship user-facing analytics, design and implement LLM-driven workflows and integrations, analyze usage and feedback to prioritize work, and iterate rapidly. Collaborate on product direction, write clear documentation, and ensure scalable services for large-scale data processing.

Design and implement backend features in Go, build data pipelines and REST APIs, work with PostgreSQL and AWS, contribute to scalable system design, and optionally develop React.js user-facing features while collaborating in a fast-paced AI-focused startup.

Build and maintain end-to-end web, backend, and mobile features using NestJS, Next.js, and React Native. Design APIs, implement data models and background jobs, collaborate with product/design, contribute to CI/CD and deployments, participate in code reviews, and ensure performance, reliability, and testability across services.

Build and maintain Django-based web applications, design RESTful APIs, implement frontend features (HTML/CSS/JS), optimize performance and security, collaborate with cross-functional teams throughout the development lifecycle.

Lead full-stack development and co-manage a lean engineering team to build SunCore's web and mobile infrastructure. Implement CI/CD, migrate hosting to DigitalOcean with Cloudflare, migrate CRM to HubSpot via Zapier, integrate multiple APIs and third-party services, and deliver a secure Flutter mobile app and dashboard with SOC2-level security, 2FA/biometric login, and wallet integrations.

Design, implement, and optimize full-stack solutions. Collaborate with cross-functional teams, participate in code reviews, analyze and improve system performance, and stay current with industry technologies.

The Full-Stack Developer will design and implement solutions for collaboration platforms, focusing on backend architecture, React-based front-end development, and integrating AI features. Responsibilities include developing services, APIs, user interfaces, and ensuring integration with various systems while utilizing Azure tools.

The Senior Engineer will build and scale fullstack applications, ensuring performance and security while collaborating with various teams. Responsibilities include developing backend services, APIs, and modern frontend applications, along with mentoring engineers and driving architectural decisions.

Design, build, and maintain cross-platform mobile applications and end-to-end web features. Implement front-end interfaces, back-end services and RESTful APIs, optimize databases, write tests and documentation, perform code reviews, and collaborate with UX, QA, and DevOps to deliver high-quality, secure, and performant solutions.

Full Stack Engineer responsible for building responsive frontends (JS/TS, React preferred) and backend services (Python, Go, or Node.js/TypeScript), designing RESTful APIs, managing databases (Postgres/MongoDB), and deploying on cloud (AWS). Collaborate with teams, optimize performance, and apply DevOps practices (Docker, Kubernetes, CI/CD). Requires strong problem-solving, communication, and 3+ years of experience.

The Full Stack Developer will design, build, and support web applications for credit and structured products, integrating third-party systems and migrating legacy applications to modern architectures, while ensuring data quality and performing reporting tasks.

Implement and maintain full-stack features for a career-intelligence platform: architect NestJS/Next.js applications, manage PostgreSQL schemas and queries, build responsive UIs with Tailwind, integrate LangChain-powered AI, implement authentication with Clerk, and create end-to-end tests and automation with Puppeteer to ensure launch readiness and performance.

Build and scale a full-stack Next.js application tracking PRs, CI health, test parity, and benchmarks across AI accelerator open-source projects. Integrate GitHub APIs and webhooks, design PR/metrics schemas, visualize results, and produce technical digests and reports on cross-accelerator parity and performance trends.

Build and scale a fintech platform across accounting, tax, and banking. Own feature lifecycle from design to deployment, write backend and frontend code, improve infrastructure and reliability, and collaborate with product and design to deliver customer-focused features.

Design, develop and maintain full-stack web applications using various technologies including Python and AWS. Manage backend APIs, optimize databases, ensure security, and establish CI/CD pipelines.

Work on real-world web applications across frontend and backend. Use modern frontend frameworks (React/Angular/Vue) and backend tech (Node.js, Python, Java, PHP). Integrate RESTful APIs with databases (MongoDB, PostgreSQL, MySQL), debug, test, optimize performance, and collaborate with designers and product teams while gaining hands-on mentorship.

Work across frontend and backend to design, build, and ship annotation and review features; implement ingestion, storage, user management, and annotation pipelines; integrate model inference into workflows; optimize performance for large images/videos; design APIs and collaborate with product, operations, and annotators.

Build and integrate systems for a maritime AI platform. Engage with customers on-site, optimizing data processing and application performance, while ensuring code quality and correctness.

Develop scalable applications and backend infrastructure for brand safety and content suitability. Design APIs, deploy ML models, and manage database systems.

As a Full Stack Engineer, you will design, develop, and maintain scalable solutions for data-driven products, collaborating with cross-functional teams.

Develop and implement full-stack applications in .NET and Azure, collaborate with teams, provide technical guidance, and ensure high-quality standards.

The Fullstack Engineer will build modern AI-powered web applications using Next.js and Hono.js, focusing on integrating advanced workflows and scalable features. Responsibilities include designing full-stack features, optimizing performance, and collaborating with team members to deliver high-quality product features.

The role involves building and integrating full-stack features for an AI chat application, focusing on reliable workflows and real-time AI interactions.