Top Front End Developer Jobs in Seattle, WA

Own frontend domains end to end, including architecture, implementation, testing, production quality, performance, accessibility, and security. Set technical direction, design reusable component systems, establish testing strategies, diagnose complex browser and production issues, and partner with Product, Design, QA, and engineering teams. Mentor engineers, review consequential changes, and use AI-first development practices while maintaining accountability for shipped software.

Leads frontend architecture strategy across products, directs design-system platform development, establishes quality, security, accessibility, performance, and testing standards, and creates tooling and guardrails for engineering teams. Sets AI-native frontend practices, improves production health, aligns Engineering, Product, Design, and QA, and develops senior engineers into broader technical ownership. The role remains hands-on for high-risk technical work while emphasizing organizational-scale technical direction.

Design, implement, and operate front-end web UI features for Microsoft Advertising. Collaborate with PMs and designers, build metrics, integrate AI capabilities, improve developer productivity, and drive high-quality, scalable solutions from concept to production.

Develop and maintain React-based frontend components for transaction forms and eSign products. Write tested, secure, and maintainable code, improve monitoring and operational reliability, participate in on-call rotations, and deliver features independently. Collaborate with product, design, and engineering teams through Agile planning, code reviews, and technical discussions. Serve as a subject matter expert for internal components and tools while contributing to scalable real estate technology.

Design, develop, test, and maintain complex distributed software systems with strong frontend expertise. Lead design and code reviews, translate requirements into scalable and secure solutions, guide sprint delivery, remove impediments, collaborate with stakeholders, and mentor engineers. The role emphasizes modern web applications, APIs, microservices, cloud platforms, containerization, DevSecOps, and technical strategy.

Build production React and TypeScript applications for an AI-powered hardware development platform. Develop shared component libraries, design systems, structured engineering-data interfaces, AI agent experiences, dashboards, and real-time project visibility. Write unit and end-to-end tests, integrate APIs and client SDKs, contribute to frontend architecture, conduct code reviews, and help establish engineering best practices while working closely with product and backend teams.

Build and ship polished, accessible, high-performance front-end features for Deepgram's Console and Playground. Partner with product and design to translate ideas into incremental releases, improve internal tools, and uphold front-end engineering standards through code reviews and design discussions.

Build and maintain a high-performance React and Next.js application in TypeScript for monitoring and managing AI workflows. Develop real-time, data-dense interfaces with streaming updates, virtualization, infinite scrolling, timelines, and interactive tables. Collaborate with product, design, backend, infrastructure, and customers on API design, debugging, architecture, testing, and performance improvements.

Collaborate with design, PMs, and partners to create and implement high-quality ads UX. Build a cross-platform, versatile rendering UX library/package. Use data processing and monitoring to analyze system performance and drive improvements across the full ads stack.

Build and own interactive web experiences across Chat, Notes, Calendar, Docs, and Sheets. Develop reusable frontend architecture, real-time collaboration, rich-text editing, scheduling, tables, spreadsheets, and streaming AI integrations. Partner with product, design, backend, and AI engineering teams to deliver reliable, accessible, high-performance experiences across browsers and devices.

Develops modern, responsive, accessible front-end interfaces, reusable component libraries, templates, and interactive features for federal and DoD-aligned IT environments. Collaborates with UX, backend, CMS, and product teams on API integrations, performance optimization, accessibility compliance, cross-browser troubleshooting, documentation, code reviews, and Agile delivery. Requires an active Secret clearance, bachelor’s degree, and at least seven years of front-end development experience.

Develop and maintain responsive front-end interfaces for federal and DoD-aligned digital properties. Responsibilities include UI and CSS updates, Section 508/WCAG accessibility improvements, content-driven template and component changes, cross-browser testing, performance optimization, design system support, code reviews, and deployment validation. The developer collaborates with UX, design, content, and backend teams while following enterprise brand, security, documentation, and version-control standards.

Develop responsive, accessible enterprise user interfaces using HTML, CSS, and JavaScript. Build interactive components, translate UX designs into production code, integrate APIs, ensure WCAG and Section 508 compliance, troubleshoot cross-browser issues, optimize performance, and support component libraries. Collaborate with designers, backend engineers, analysts, and product owners in Agile environments while documenting standards and implementations.

Own frontend architecture for React and TypeScript applications supporting complex research and analytics workflows. Build performant, accessible interfaces; establish standards for performance, testing, accessibility, and CI quality gates; evolve shared component libraries and design systems; partner on API contracts; address technical debt; contribute to Django services; and mentor engineers while leading department-wide technical initiatives.

The Frontend Engineer role involves developing scalable web applications using Angular, ensuring high-quality user experiences, optimizing performance, and collaborating with backend teams. Responsibilities include code reviews, testing, and supporting deployment processes.

Design, build, and optimize responsive, high-performance front-end interfaces for a Web3 DEX using modern JavaScript frameworks and TypeScript. Collaborate with designers, product, and back-end teams to integrate blockchain APIs and smart contracts, mentor junior developers, troubleshoot issues, and contribute to mobile-first/PWA development while ensuring scalability and maintainability.

Build and maintain frontend products, features, and scaling tools across the Brex stack. Collaborate with engineers, sales, support, product, design, and operations to understand customer needs, run experience-improving experiments, and own solutions end to end. Architect scalable client-side software, track metrics, and polish features to high engineering standards while contributing to technical vision and leading cross-functional projects.

Build and maintain distributed, high-volume eCommerce systems using mobile-first responsive design. Develop across the full stack with .NET, ASP.NET, C#, MVC, JavaScript, HTML5, CSS3, and SQL Server. Integrate user interfaces with databases, apply object-oriented design patterns, collaborate with outsourced partners, and troubleshoot problems in a fast-paced environment. The role requires strong communication, attention to detail, process orientation, and quick decision-making.

Build and refine front-end experiences for web and mobile: onboarding, checkout, gallery features, design system and enterprise dashboard. Collaborate closely with designers and PMs, ship fast, maintain aesthetic quality, and iterate with user feedback using React, Next.js and TypeScript.

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.

Leads frontend and full-stack development for a scalable transaction management platform supporting real estate transactions. Owns platform architecture, data ingestion, reliability, technical projects, and operational excellence. Collaborates with product and design teams, integrates AI and modern cloud systems, reduces technical debt and infrastructure costs, and mentors or recruits engineers. Builds fault-tolerant, highly available, well-tested, modular software using modern development, CI/CD, testing, and monitoring practices.

Lead frontend architecture and development for an AI-powered voice platform. Build responsive dashboards and reusable components, integrate real-time WebSocket and WebRTC voice capabilities, consume AI backend APIs, manage complex application state, and optimize performance, accessibility, and reliability. Mentor frontend developers, establish coding standards, collaborate with designers and backend teams, and develop prototypes, testing strategies, and production-ready interfaces.

Lead frontend-leaning full-stack implementation work for carrier and enterprise integrations: architect reusable UI and API layers, author RFCs, guide technical delivery, enforce testing and security best practices, and partner with cross-functional teams to scope and ship production integrations.

Leads long-term frontend architecture and technical strategy across major product areas. Designs scalable, performant systems using Angular and React, resolves cross-team challenges, establishes quality and testing standards, mentors senior engineers, and influences technical roadmaps and organizational decisions. The role combines hands-on implementation with company-wide technical leadership and requires deep expertise in frontend scalability, performance optimization, state management, and reusable component architecture.

Leads the design and development of complex frontend systems and product features using Angular and React. Architects scalable frontend patterns, improves performance and engineering velocity, drives testing and code-quality practices, and leads major technical initiatives. Partners cross-functionally with backend, product, design, integrations, and QA; makes technical decisions, mentors engineers, and advances frontend architecture and collaboration across teams.