Top Full-Stack Engineer Jobs in Seattle, WA

Develop and support a production full-stack platform for alternative investment managers. Responsibilities include building frontend features, backend services, APIs, data-ingestion workflows, validation, scheduled jobs, SQL queries, database migrations, audit trails, access controls, automated tests, and production issue resolution. The role also involves code reviews, releases, technical documentation, and coordination with technical and DevOps teams on deployments and upgrades.

Own architecture and implementation across React, Node.js, and Web3 integrations. Build decentralized applications, integrate wallets, DeFi protocols, blockchain data, and third-party APIs, and scale real-time data infrastructure. Lead features from design through deployment and production support while improving performance, security, reliability, and interoperability. Work independently in a demanding startup environment with substantial technical ownership.

Lead the Kyber prototyping and rapid deployment platform, setting technical direction, rebuilding it on next-generation cloud infrastructure, and scaling it for thousands of internal users. Responsibilities include hands-on coding, architecture, product integration, cross-functional collaboration, improving tools for non-technical builders, and mentoring engineers.

Build and optimize growth and retention features across a TypeScript backend and React frontend. Ship feature-flagged experiments, instrument patient journeys, analyze results, improve performance and accessibility, and maintain a high-quality consumer experience. Collaborate with product and design, review code, mentor engineers, and resolve patient experience incidents. The role is fully remote and supports a digital health platform.

Develop secure, scalable full-stack applications using Java, Spring Boot, microservices, REST APIs, AWS, Docker, and Kubernetes, while leading Angular frontend architecture and development. Build responsive interfaces with Angular, TypeScript, NgRx, RxJS, and Angular Material. Contribute across the software development lifecycle, including design, testing, automation, troubleshooting, and deployment. The role requires enterprise architecture experience, Agile collaboration, and mandatory fraud prevention domain expertise.

Build secure, scalable full-stack applications using Java, Spring Boot, microservices, REST APIs, AWS, and Angular. Develop responsive user interfaces, integrate APIs, implement authentication and authorization, design distributed architectures, and support testing, troubleshooting, and automation. The role requires mandatory fraud prevention domain experience and collaboration within Agile engineering teams.

Lead architecture and full-stack development for greenfield products and major system changes. Design scalable APIs, UIs, integration services, and durable workflows; integrate SaaS systems, third-party applications, and production LLM capabilities. Document architectural decisions, ensure maintainable code, troubleshoot integrations, improve observability and automation, and mentor teams while driving scalable improvements in delivery and quality.

Build and maintain AI-assisted full-stack platforms for manufacturing, spanning AWS infrastructure, Python Lambda services, Java microservices, agentic LLM workflows, and Angular interfaces. Develop event-driven architectures, APIs, retrieval and scoring systems, infrastructure as code, observability, CI/CD, and secure deployment strategies. Apply rigorous testing, specification-driven development, concurrency practices, and production reliability techniques across multi-repository systems. The role requires hands-on software development experience with enterprise server, storage, or networking products.

Own and develop a TypeScript monorepo spanning Next.js, Expo, and Cloudflare Worker applications. Build secure PostgreSQL and Prisma systems, webhook handlers, background jobs, authentication, encrypted financial data workflows, and AI-powered financial features. Responsibilities include production ownership, incident response, code review, and ensuring reliability, security, idempotency, and data isolation across web and mobile products.

Design, build, and deploy secure, high-performance, scalable cloud-native applications supporting Ariba P2P. Work full-stack in Java using Spring Boot and the SAP BTP Cloud Foundry CAP (Java) model, applying resiliency, security, and performance best practices.

Develop and maintain full-stack healthcare applications using Java, Spring Boot, Angular, and TypeScript. Build APIs, data models, user interfaces, and automated testing suites while optimizing data operations for scalability, performance, integrity, and security. Scope and deliver medium-to-large features, reduce technical debt, contribute to system design, and support team members in a remote-first environment.

Build and maintain scalable fullstack web and desktop applications across frontend and backend systems. Develop React and TypeScript interfaces, RESTful APIs, microservices, and backend services using technologies such as Node.js, Java, Python, and AWS. Collaborate with product and design teams, participate in code reviews and systems design, troubleshoot performance issues, and contribute to Agile and CI/CD processes.

Design and maintain scalable full-stack software solutions using Python and Pandas. Develop data infrastructure, integrate technologies, optimize application performance, and collaborate cross-functionally to deliver reliable products. The role requires strong AWS and scalable architecture expertise, with a focus on continuous improvement and customer impact.

Build and ship end-to-end features for a restaurant operating system, lead architecture and technical execution, define product roadmap with cross-functional teams, and maintain high-quality CI/CD and productionized systems.

Volunteer Principal Full Stack Engineer to lead and contribute across frontend and backend (React/React Native, Node.js, MongoDB). Own feature development, mentor engineers, collaborate with product/design, ship scalable code, and support CI processes. Must commit 4+ hours weekly and attend a weekly standup; first task includes launching a fundraising campaign.

Build and maintain core products and collaborate on larger consulting projects using TypeScript, Python, FastAPI, Next.js, GCP, and generative AI frameworks. The role involves hands-on software development within a rapidly growing, remote team serving Saudi Arabia and the GCC.

Build and maintain full‑stack TypeScript web applications, design RESTful APIs and microservices, optimize frontend and backend performance, write tests, participate across the development lifecycle, perform code reviews, and collaborate with product and design to ship scalable travel‑management features.

Build and ship production features across backend services, APIs, and frontend systems supporting AI-driven EMR, billing, and operational workflows. Design scalable systems, collaborate with product and design, own projects from concept through launch, write tested code, participate in reviews and architecture decisions, and improve reliability and developer workflows.

Build and ship end-to-end product features across an author analytics dashboard, marketing site, free tools, billing, email, and AI-assisted functionality. Design data models and APIs, integrate third-party services, develop production LLM features, and maintain testing, monitoring, performance, and observability. The role includes code review, technical documentation, independent product decisions, and close collaboration with the founder in a remote-first environment.

Build end-to-end features across frontend and backend using React/TypeScript and Node.js (some legacy Go). Collaborate with design, ship via continuous deployment, debug and monitor production, use AI coding tools, and make product and technical decisions while owning delivered features.

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.

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.

Build and maintain Alpaca Connect developer-platform experiences using TypeScript, React, and Go. Improve onboarding, app management, compliance review, publishing, consent, and permissions workflows. Design APIs and integrations with identity, account, trading, and market-data systems while creating secure, auditable self-service tools. Own features from design through production and collaborate with Product, Design, Compliance, Support, Partnerships, and Platform teams.

Lead hands-on full-stack engineering for Minecraft, building accessible and secure user interfaces, application logic, APIs, services, and data integrations. Establish engineering standards, mentor teammates, conduct design and code reviews, and improve reliability through testing, CI/CD, observability, telemetry, and performance work. Collaborate across design, product, and engineering to deliver maintainable software from early exploration through live operation.

Build, test, and ship software across web and mobile platforms using Python/Django, TypeScript, React, and React Native. Develop engineering tooling, core patient and internal-user web application features, and AI-assisted workflows. Improve development processes and product functionality while working as a generalist on a small, fast-paced startup team.