Top Front End Developer Jobs in Seattle, WA

Build and improve ClickUp’s core product experiences using Angular and React. Responsibilities include architecting reusable frontend code, collaborating with product, design, backend, integrations, and QA teams, improving performance and usability, maintaining unit and integration tests, resolving complex bugs, following state-management patterns, and mentoring teammates in a fast-paced environment.

Build and maintain Microsoft Ads front-end UI for campaign management. Collaborate with PMs and designers to design, implement, and operate features, build metrics, and integrate AI-powered capabilities to improve product and engineering productivity.

The Sr. Front-End Full-Stack Developer will design, implement and maintain features for a commercial software platform, collaborating closely with teams and ensuring high quality through testing and operations.

Build and own frontend applications for DeFi products using Next.js and TypeScript. Develop reusable component libraries and design systems, integrate Solana programs and wallet infrastructure, and translate complex financial concepts into accessible interfaces. Own performance, reliability, observability, testing, analytics, and end-to-end feature delivery while collaborating with protocol engineers, designers, and product teams.

This role involves leading web platform initiatives, mentoring senior engineers, architecting web applications, and implementing technical strategies for improved performance.

Architect and build a high-performance, low-latency trading web platform. Integrate real-time market data and execution workflows, collaborate cross-functionally on large initiatives, and deliver scalable, performant, user-focused frontend applications with strong attention to API design, tooling, and developer experience.

Develop and maintain responsive web applications using Angular, JavaScript, and TypeScript. Build reusable UI components, integrate REST APIs, translate designs into functional interfaces, and optimize performance, accessibility, and browser compatibility. Troubleshoot issues, participate in testing and code reviews, and collaborate with designers, backend developers, QA, and product teams in an Agile/Scrum environment.

Seeking a Java Front End Developer with expertise in AngularJS and HTML to discuss solutions with customers and understand system architecture.

The role involves architecting, designing, and developing multi-channel eCommerce applications, overseeing developers, managing project setups, and responding to client inquiries.

Seeking a Java Front End Developer with experience in Java, AngularJS, and other front-end technologies to enhance user interface development.

The Front End Developer will handle architecture and development of multi-channel eCommerce applications, oversee other developers, and adapt workflows based on client requests.

The role involves architecture, design, and development of Java-based systems, overseeing projects, and advising clients. Extensive experience in Java development is essential.

Seeking Java developers proficient in backend frameworks like Spring or Hibernate and frontend technologies such as HTML, CSS, and JavaScript.

The role requires a front-end developer with experience in Angular JS, React, TypeScript, and strong skills in Microsoft technologies such as C# and .Net. Good communication and problem-solving skills are essential.

KRG Technologies seeks UI and Frontend Developers with varying experience levels for long-term contracts in Redmond, WA, focusing on skills in JavaScript, HTML, CSS, and related frameworks.

Develop Front End solutions using AngularJS and HTML, while understanding customer requirements and maintaining standards in web accessibility.

The Front End/UI Developer will design UI pages, prototype designs, and develop front end using HTML5, CSS, and JavaScript for embedding libraries.

As a Senior Frontend Engineer at Hive, you will build high-performance applications, work with design and product teams, and enhance user experiences using advanced web technologies.

The role involves building secure user interfaces using React, collaborating with design and product teams, and ensuring code security and best practices.

Build scalable React/TypeScript frontends to visualize and interact with large-scale, real-time telemetry. Define data models and workflows, optimize rendering and performance, collaborate with product, design, and backend teams, and turn ambiguous requirements into intuitive, mission-critical interfaces for technical users.

Seeking a Senior Fullstack Engineer to architect and develop a customer-facing platform, bridging AI/ML systems and user features.

Build high-performance front-end interfaces for generative and agentic AI experiences using React and TypeScript. Develop reusable accessible component libraries, conversational workflows, streaming interfaces, agent execution visualizations, and dynamic outputs. Integrate RAG, ESRE, and orchestration APIs; optimize asynchronous state and real-time response performance; implement UX analytics; and collaborate with designers, product managers, backend engineers, and users. Maintain design-system alignment, accessibility compliance, documentation, and front-end architecture.

Design and build a scalable, responsive UI; lead frontend architecture and optimization; apply UI/UX best practices; integrate with backend APIs; ensure high web performance and deploy user-facing features.

Build and maintain TypeScript/React frontends and SDKs for the Nomina web3 platform, create user-facing dapps, improve developer documentation and DX, and collaborate with product and engineering to deliver high-quality, mobile-friendly features.

As a Senior Frontend Engineer at Cinch, you'll lead the modernization and performance optimization of React-based user interfaces, collaborate with cross-functional teams, and architect scalable UI systems with a focus on AI-driven experiences.