Top Remote Senior Full-Stack Engineer Jobs in Seattle, WA

As a Full Stack Engineer III at Calendly, you'll develop features, scale the platform, and mentor team members while using various technologies.

Seeking a Senior Software Engineer with expertise in cloud and full stack development, focusing on CI/CD, microservices, and team leadership.

The Senior Full Stack Engineer will build platform integrations, work across the full stack, shape product architecture, and collaborate cross-functionally to enhance digital experiences.

Senior Full Stack Engineer building scalable, high-performance web applications. Own feature design through delivery, write clean reusable code, optimize databases, work with CI/CD, containers, cloud, distributed systems, mentor teammates, and maintain zero customer-reported bugs.

Join LTK as a Senior Software Engineer to design, build, and maintain scalable fullstack systems, optimize applications, and mentor engineers in a fast-paced remote environment.

Design, build, and scale end-to-end user-facing web applications. Implement and maintain backend services and APIs, build frontend components (React), model relational data (PostgreSQL), collaborate with product and design, participate in technical design, mentor engineers, and deliver high-quality, user-focused features.

Seeking a Senior Full Stack .NET Developer to work on a social good project, with strong skills in C#, AngularJS, design, and UX. Requires 5+ years of experience.

Lead complex software projects, mentor engineers, and set technical direction at Vanta while contributing to security and compliance solutions.

Build and operate end-to-end premium purchasing and subscription systems (Stripe, Apple/Google IAP, payments). Own projects from design through rollout and reliability, instrument observability, debug production, define metrics, mentor engineers, and drive technical direction and standards.

As a Senior Software Engineer, you'll design and maintain frontend applications and reusable components, integrate APIs, mentor engineers, and ensure high-quality user experiences in the fintech space.

Senior full-stack engineer responsible for designing, building, and maintaining TypeScript/React frontends and backend services. Lead architecture, mentor engineers, write automated tests, optimize systems for scalability and performance, and collaborate with product and stakeholders to deliver secure, reliable cloud-based solutions.

Build and ship full-stack features including customer dashboards and APIs for high-volume, low-latency security telemetry. Integrate with real-time data pipelines to surface detections, improve performance and reliability, own features end-to-end, and partner with product and security research to take prototypes to production.

Lead technical direction for Internal Tools, designing and building end-to-end front-end and back-end systems. Implement recommendation, ranking, and search capabilities, reduce technical debt with refactors, establish engineering standards, mentor engineers, and ensure secure admin interfaces and reusable tooling.

Lead architecture and implementation of scalable web applications using NestJS and Next.js. Build and optimize PostgreSQL schemas and queries, implement responsive UIs with Tailwind CSS, integrate LangChain-driven AI features, manage authentication with Clerk, and create end-to-end tests and automation with Puppeteer to ensure launch readiness and reliable user experiences.

Lead design, development, testing, and deployment of cloud-native full‑stack applications and microservices. Provide technical leadership, mentor engineers, implement CI/CD and automated tests, and drive modernization using GCP or similar cloud platforms, containers, and enterprise security best practices.

Build and ship end-to-end features across a TypeScript/Next.js monolith: dashboard, marketing site, billing, email, and AI-assisted tools. Own data models, APIs, third-party integrations, testing, observability, and production quality. Collaborate with the founder, review code, and improve engineering practices while delivering customer-facing features rapidly.

Lead design and implementation of end-to-end product features, drive technical decisions, use AI tools to accelerate development, support teammates through code reviews and standards, and continuously improve architecture, tooling, testing, and developer experience to deliver reliable production software for financial advisors.

Design, build, and maintain AI-powered B2B SaaS products across frontend, backend, and AI. Own projects end-to-end, collaborate with product and design, ensure maintainability, mentor teammates, and inform roadmap and implementation decisions.

Senior full‑stack engineer responsible for building backend services (Node.js/TypeScript) and integrating with frontends (React/Vue). Ship production APIs, collaborate cross‑functionally, own delivery, mentor peers, and develop modular, testable, performant systems across diverse greenfield projects.

Founding-team senior engineer to architect and build core platform components. Work with CEO/CTO to develop scalable distributed backend systems and frontend using React, Node.js and TypeScript. Implement solid coding practices, testing, CI/CD, and agile workflows while iterating rapidly in an early-stage fintech startup.

Lead the development of Coperniq's platform by designing, developing, and maintaining scalable full-stack solutions while collaborating with teams and mentoring juniors.

The Senior Software Engineer will own the development of full-stack features from UI to backend, mentor junior engineers, and drive technical decisions.

The Senior Full Stack Java Developer will design and maintain enterprise applications using Java and modern front-end technologies while collaborating in Agile teams and mentoring junior developers.

As a Senior Fullstack Software Engineer at Vanta, you will lead complex projects, set technical direction, design and develop new functionalities, and contribute to the engineering culture while mentoring other engineers.

Build end-to-end features, design intuitive interfaces, manage asynchronous backend jobs, and contribute to open-source efforts, while leading project development from concept to monitoring.