Top Front End Developer Jobs in Seattle, WA

Build and own scalable, high-performance frontend experiences for growth, including websites, funnels, campaign platforms, personalized journeys, and AI-powered tools. Lead end-to-end delivery, optimize performance and conversion through experimentation, and collaborate with Product, Design, Marketing, Data Science, and Backend Engineering. Improve frontend architecture, reusable components, accessibility, SEO, and engineering quality while mentoring teammates and solving ambiguous business problems.

Lead frontend technical strategy for Affirm’s checkout decision orchestration systems. Design and architect scalable web applications, guide major technical initiatives, improve reliability and operational processes, establish engineering quality standards, collaborate with product, design, and analytics, and mentor engineers. The role focuses on building fast, clear, and reliable checkout experiences using modern declarative UI frameworks.

Build and maintain Vue.js interfaces for Openly’s insurance platform, supporting agents and internal users. Responsibilities include implementing UX initiatives, developing administration interfaces, integrating REST and GraphQL APIs, simplifying technical designs, contributing to architectural decisions, testing applications, identifying technical risks, and collaborating across product and engineering teams.

Develop responsive, interactive, high-performance websites using HTML, CSS, and JavaScript. Translate UX/UI designs into functional web applications, collaborate with backend developers on integrations, optimize performance, maintain code quality, and conduct cross-browser testing and debugging across devices.

Build frontend experiences for authentication and authorization, including role management, user and group administration, workspaces, API keys, data access controls, and enterprise sign-in. Develop scalable React and TypeScript architecture, improve performance for complex workflows and large datasets, and make permission models understandable. Partner with product, design, and backend teams to solve ambiguous problems and shape intuitive, secure user experiences.

Build robust, scalable frontend applications for Deploy’s data and enterprise products. Collaborate with design, product, and engineering teams to deliver high-quality user experiences, participate in product decisions, improve team efficiency, and secure code using OWASP practices. The role requires strong JavaScript, HTML, CSS, React, Redux, software design, testing, communication, and independent decision-making skills.

Build secure, scalable frontend interfaces for Deploy’s data and enterprise products using React, JavaScript, Redux, and related web technologies. Collaborate with design, product, and engineering teams to deliver user-focused features, participate in product decisions, improve team efficiency, apply OWASP security practices, and write maintainable, testable code.

Own the frontend architecture and implementation of a greenfield legal technology product using React and TypeScript. Build complex workflow experiences, reusable components, state management, forms, validation, API integrations, role-aware interfaces, AI-enabled workflows, and automated tests. Ensure accessibility, performance, responsiveness, browser compatibility, and production quality. Partner with backend, product, and design teams, establish frontend standards, review code, and provide technical guidance to other developers.

Own and deliver web frontend products at Uber scale, partnering with stakeholders and cross-functional teams. Build applications using React, GraphQL, Flow, CSS-in-JS, Node.js, and Uber’s frontend frameworks. Measure feature experiments, collaborate with Data Science and Product teams, and iterate on user experiences. Mentor junior engineers, provide technical leadership, and ship high-quality features on schedule.

Build and refine customer-facing React features and internal dashboards, implement TypeScript-based UIs in strict mode, integrate frontend with backend APIs, and contribute to product and design decisions for an AI-driven scheduling assistant.

Develop and maintain Angular-based B2C eCommerce experiences using TypeScript, NgRx, HTML, CSS, and JavaScript. Build responsive, accessible, SEO-focused pages, CMS components, checkout flows, integrations, and campaign updates. Consume REST APIs, maintain third-party platform integrations, implement analytics and tag management, and write automated unit and end-to-end tests. Collaborate with Creative, Marketing, vendors, and business stakeholders while troubleshooting performance and usability issues and independently managing priorities.

Build and maintain responsive B2C ecommerce experiences using Angular, TypeScript, HTML, CSS, and JavaScript. Develop product pages, CMS components, integrations, checkout features, SEO enhancements, accessibility-compliant interfaces, analytics tracking, and automated tests. Collaborate with Creative, Marketing, vendors, stakeholders, and senior developers while troubleshooting issues, participating in code reviews, and supporting launches and seasonal campaigns.

Senior or Staff Frontend Engineer responsible for developing scalable, high-performance web applications, shaping frontend architecture, mentoring engineers, and leading cross-functional feature delivery. The role requires modern JavaScript and TypeScript expertise, strong UI system design, API integration, debugging, and technical documentation skills. The engineer will also promote AI-assisted and agentic development practices, collaborate with product and backend teams, and build intuitive healthcare payment interfaces.

Senior UI Engineer responsible for building accessible, high-performance React applications and scalable front-end architecture for a pharmacy management platform. The role includes developing design-system components, defining API contracts, leading testing and code reviews, improving performance and accessibility, mentoring engineers, partnering with product and design, and using AI development tools responsibly. Candidates need strong React, TypeScript, CSS, REST API, Node.js, and PostgreSQL experience, plus end-to-end project ownership and cross-functional leadership.

Build and maintain customer-facing and internal web applications using React and TypeScript across Rails-embedded and standalone environments. Own shared component libraries, implement Figma designs, improve frontend performance, integrate REST APIs, expand automated testing, and investigate production issues. Collaborate closely with design, product, and backend engineering while documenting maintainable patterns and applying coding agents effectively.

Lead the strategic direction of frontend engineering, architecture, tooling, and standards. Build accessible, high-performing React or Angular applications, component libraries, design systems, deployment pipelines, and testing strategies. Drive modernization, performance, accessibility, and developer-experience initiatives while collaborating with product and design teams. Mentor engineers, influence cross-team technical decisions, and contribute across the full stack when needed. The role is remote, requires U.S. citizenship and the ability to obtain Public Trust 6C, and involves up to 10% travel.

Own end-to-end development of customer-facing web platform features, emphasizing React and TypeScript frontend development while contributing to Python backend services. Translate product concepts and designs into reusable, intuitive UI components, partner with Product and Design, engage directly with users, and use AI-powered tools to accelerate development while maintaining code quality and performance.

Design, develop, and maintain web and mobile applications for Alpaca’s trading API customers. Build responsive, performant, accessible user interfaces and deliver high-visibility features from design through deployment. Collaborate with cross-functional teams, contribute to frontend and backend systems, influence technical strategy, and mentor peers. Work includes trading dashboards, product features, and end-to-end user experiences across frontend and backend platforms.

Build responsive, high-performance React and Next.js interfaces for cloud workspace creation, resource management, billing, monitoring, and developer tools. Integrate applications with backend APIs and real-time services, improve performance and accessibility, and develop reusable components. Collaborate with backend engineers and product teams while contributing to feature ownership and product decisions.

Build and maintain responsive, accessible web interfaces using React, HTML, CSS, and JavaScript/TypeScript. Integrate applications with REST APIs and back-end services, implement WebSocket features, optimize Core Web Vitals, and develop reusable design-system components. The role also involves Node.js tooling, cross-browser compatibility, code reviews, QA collaboration, and front-end testing.

Build and ship healthcare software across the frontend, API, and database using React, TypeScript, Next.js, tRPC, Prisma, and related technologies. Own features end to end, prototype with AI tools, test with patients and care teams, and improve performance, accessibility, reliability, and scalability. Collaborate closely with company leadership in a fast-paced startup environment while developing trustworthy automation for healthcare delivery.

Develop and maintain responsive frontend interfaces, dashboards, reports, and enterprise web applications. Translate requirements into functional user interfaces, build UI and automated tests, troubleshoot and optimize performance, implement REST API integrations and routing, and collaborate with backend developers and testers. The role requires React, JavaScript, Redux, Node.js, and related frontend technologies, with preferred experience in dashboards, reporting, testing, AWS, and government applications.

Build and maintain responsive, accessible front-end interfaces using React, React Native, HTML, CSS, and Shopify. Apply UX/UI principles, collaborate with designers and multidisciplinary teams, provide clear technical feedback, and independently deliver high-quality work on complex technology or AI-related projects. Contractors complete output-based tasks and must meet weekly minimum submission requirements, with an expected start within 24–48 hours of onboarding.

Design and build user-facing features for a live video chat and multiplayer gaming platform. Collaborate with designers and product managers, lead technical quality and scalability efforts, rapidly experiment, and solve customer problems through deep user understanding. The role focuses on front-end architecture using TypeScript and React, with Node.js proficiency and strong CSS fundamentals.

Lead frontend feature releases and own user experience, performance, testing, and production health for a React and TypeScript dental practice management platform. Collaborate with backend engineers using Java Spring Boot, develop AI-powered interfaces, integrate AI tools such as Claude, participate in code reviews, improve team efficiency, and estimate development work for timely delivery.