Top Senior Front End Developer Jobs in Seattle, WA

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.

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.

Build and own complex frontend features using Vue 3 and TypeScript while developing the Python services and APIs that power them. Improve performance, accessibility, testing, CI/CD, and observability; collaborate with product and design; mentor engineers and apply AI-assisted development tools responsibly to accelerate productivity and maintain quality and security.

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.

Lead architecture and delivery of large-scale React and React Native frontends. Define frontend strategy and best practices, build shared component libraries and design systems, optimize performance and accessibility, collaborate with product/design/backend teams, mentor junior engineers, and resolve complex frontend and cross-stack issues.

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 own end-to-end full-stack systems for AI-powered agentic trading across web and React Native mobile. Implement real-time, low-latency UIs and Go backend services, integrate streaming AI/ML features and market data, drive architecture and code quality, and collaborate with AI/ML, design, and product teams to ship production-ready features used by millions.

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.

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.

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

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.

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.

Designs, builds, and enhances enterprise SAP Fiori applications across desktop, tablet, and mobile. Owns the Fiori/UI5 development lifecycle, collaborating with functional consultants, ABAP developers, and UX teams. Develops with SAPUI5, Fiori elements, OData, HTML5, JavaScript, and CSS; deploys applications to ABAP frontend and BTP runtimes. Ensures usability, accessibility, performance, security, maintainability, and adherence to SAP Fiori Design Guidelines.

As a Senior Software Engineer I, you'll develop scalable frontend applications using React and TypeScript, lead engineering reviews, mentor team members, and collaborate on technical roadmaps for mission-critical software.

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 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.

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.

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, build, and own front-end features across the full lifecycle. Deliver high-quality, tested UI experiences, collaborate with product and UX, drive cross-component changes, mentor peers, and participate in hiring while working in distributed systems.

As a Senior Frontend Software Engineer, you'll develop features and enhance user experience through Typescript and React, while collaborating with cross-functional teams.

Own frontend features from concept through launch and iteration. Build web and mobile applications for a wallet-as-a-service platform, develop SDKs and integration tools, and create secure, intuitive fintech-grade user experiences. Collaborate with Product and Design, write documentation, review code, and maintain high standards for architecture, performance, and security.

Lead frontend development for a DeFi platform, owning React and TypeScript architecture, Solana integrations, transaction flows, real-time blockchain data, and high-performance user experiences. Collaborate with product, design, and backend teams to deliver features, establish engineering standards, review code, and mentor future frontend hires. The role requires production frontend expertise, deep Solana knowledge, and leadership of projects or teams.