Top Front End Developer Jobs in Seattle, WA

Build fast, accessible, component-based web interfaces for Layla’s conversational AI travel-planning and booking experience. Translate designs into maintainable React applications, collaborate across Product, Design, and backend teams, integrate AI/ML capabilities responsibly, optimize performance and reliability, run experiments, influence frontend architecture, and mentor engineers through reviews and knowledge sharing.

Senior frontend-focused software engineer responsible for authentication, verification, and fraud experiences across web, mobile, and backend systems. The role owns team goals, designs and delivers highly available systems, collaborates with product and design partners, improves engineering standards, supports operations and on-call efforts, and mentors engineers. Candidates should have strong web application architecture experience, proficiency with React or Vue and JavaScript or TypeScript, and excellent communication skills.

Build responsive Web3 applications, web SDKs, developer tools, reusable frontend components, and internal Customer Success tools. Collaborate with Product, Design, and Engineering to create scalable, accessible user experiences. Contribute to code and design reviews, automated testing, continuous delivery, coding standards, and AI-assisted development practices.

Own end-to-end frontend development for core crypto payment flows across web and mobile. Improve latency, availability, and SLOs; build user-facing features (contacts, real-time transaction status); identify and fix performance bottlenecks; partner with product/design/backend; mentor junior engineers to reduce customer friction at scale.

As a Front-End Software Engineer, you will build AI-powered interfaces, tackle complex design problems, and collaborate across teams to enhance user experiences. Responsibilities include mentoring, implementing responsive UI, and engaging with AI technologies.

Lead frontend development for Coinbase identity experiences including login, signup, OAuth, account security, and multi-factor authentication. Own projects from design through deployment and monitoring, guide Native versus Webview architecture, author technical designs, resolve systemic technical debt, lead on-call and incident response, and mentor engineers.

Lead the architecture and delivery of large-scale React and React Native applications across web and mobile. Establish frontend standards for performance, accessibility, reliability, and maintainability; build shared component libraries and design systems; resolve complex frontend and cross-stack issues; partner with product, design, and backend teams; and mentor engineers while shaping technical strategy across multiple product areas.

Lead front-end technical strategy for Coinbase Advanced trading platform: define and execute a scalable roadmap, deliver a low-latency interface across web and mobile, mentor engineers, anchor complex projects, and ensure high standards for code quality and system design.

Develop and maintain secure, scalable web-based identity experiences for Disney streaming platforms, including login, registration, account, profile, and verification flows. Collaborate with product, design, backend, security, commerce, and platform teams. Lead complex feature delivery, write tested and maintainable code, troubleshoot production issues, contribute to architecture, mentor teammates, and support deployment, monitoring, observability, and continuous improvement.

Build and own end-to-end frontend experiences for Coinbase card products across web and mobile. Ship high-scale consumer features, improve payment flow performance and SLOs, reduce latency and CX contacts, mentor engineers, and collaborate with product, design, and backend teams to deliver reliable, user-focused card functionality.

Develop and enhance SAP Fiori and UI5 applications across desktop and mobile platforms. Own the full front-end development lifecycle, including SAPUI5, Fiori Elements, OData integration, UX, accessibility, performance, authentication, deployment, and maintainability. Collaborate with functional consultants, ABAP developers, and UX teams while deploying applications to ABAP front-end and BTP runtimes.

Build and own high-performance, customer-facing frontend applications using React, Redux, and TypeScript. Integrate AI-powered features, establish AI development guardrails, optimize scalability and reliability, and maintain design systems, testing standards, and continuous delivery practices. Collaborate with product, design, and backend teams while mentoring engineers and driving features from concept through production.

Volunteer Principal Front End Developer to build React/React Native web and mobile features, mentor engineers, implement scalable full‑stack solutions, ensure cross‑browser compatibility and testing, work with Node/MongoDB/AWS, attend weekly standups, and support a fundraising launch. Minimum 4 hours/week commitment.

Design, develop, and enhance custom SAP Fiori/UI5 applications; configure Fiori Launchpad; integrate OData services; perform UI debugging, performance optimization, code reviews, unit testing, and documentation while collaborating with backend and functional teams.

Build and maintain fast, intuitive frontend applications for blockchain and Web3 products. Collaborate with product, design, and engineering teams; develop reusable components and frontend architecture; integrate wallets and smart-contract interactions; improve performance, reliability, and accessibility; participate in technical planning and code reviews; mentor other developers and establish frontend best practices.

Build, test, and optimize responsive web applications using Next.js and React. Collaborate with designers and back-end developers, implement UI/UX designs, write clean maintainable code, and debug front-end issues to ensure high performance across devices and browsers.

Build high-performance, responsive, and accessible frontend applications across e-commerce, B2B, and internal tools using Next.js, React, and TypeScript. Implement design-system components, optimize Core Web Vitals, add animations, support A/B testing, collaborate in a monorepo with backend teams, and design interfaces for AI agents with real-time streaming and error handling.

Develop responsive web applications using Angular or React, create reusable UI components, translate designs into HTML/CSS, integrate REST APIs, and optimize frontend performance. Maintain Kubernetes environments and deploy containerized applications using Docker, Jenkins or Azure DevOps, and CI/CD pipelines. Troubleshoot infrastructure, networking, deployment, and application issues across development, staging, and production environments.

Develop modern web applications focusing on UI components using React while ensuring performance, accessibility, and cross-browser compatibility.

Lead architecture and implementation of scalable, performant advertiser-facing web experiences. Drive frontend platform modernization, AI-enabled engineering practices, shared frameworks, and cross-team technical alignment. Mentor engineers, run architecture reviews, and improve performance, accessibility, observability, and developer productivity.

Build and own a compliance platform UI from scratch, including dashboards, contract and BAA management, data residency, opt-in/opt-out, authentication, authorization, and access reporting. Partner with backend engineering to shape APIs, launch a lightweight v1, and iterate with internal users across engineering, customer success, DevOps, executives, and privacy teams.

Develop and maintain React-based command-and-control web applications for complex defense projects. Responsibilities include gathering operator feedback, prototyping features, building reusable component libraries, writing accessible and performant code, participating in the full agile software development lifecycle, conducting code reviews, testing, deployment, and collaborating with cross-functional teams and customers.

Design, build, and deliver front-end features with strong UX focus. Own technical design, coding, testing, deployment, and monitoring in a continuous delivery, microservices environment. Collaborate with Product, implement automated QA practices, and contribute to production deployments while practicing robust testing methodologies.

Build and evolve scalable, performant, accessible frontend features for high-traffic commerce platforms. Responsibilities include designing reusable components, integrating backend and commerce services, contributing to frontend architecture, automated testing, code reviews, deployments, monitoring, troubleshooting, incident response, documentation, and reliability improvements. Collaborate with product, design, backend, and leadership teams while sharing best practices and mentoring engineers.

Build and maintain responsive, accessible React/NextJS web interfaces and support Chrome extension development (Manifest V3). Integrate with backend APIs or WebSockets, optimize performance, write tests, perform code reviews, monitor and document extension and web app behavior, and collaborate with cross-functional teams.