Top Senior Front-End Engineer Jobs in San Francisco, CA

Design, build, and maintain scalable Angular frontend applications using TypeScript, RxJS, and Tailwind. Implement complex UI features, mapping/geolocation with Google Maps API, state management, testing (Jasmine/Karma), error monitoring (Sentry), and CI/CD workflows while collaborating cross-functionally and supporting multiple environments.

The Senior Frontend Engineer will develop mobile web products using React Native and TypeScript, collaborate with designers, write clean code, and integrate UI components with backend services.

The Senior Frontend Engineer will build and enhance core product experiences using Angular 2+ and React, ensuring high-quality code and collaboration with other teams.

Build the realtime, HIPAA-compliant messaging and collaboration frontend ('Pulse') that makes an AI colleague feel human. Implement complex interactive data visualizations, micro-interactions, and high-performance accessible interfaces. Work embedded with product and design, own UI quality, iterate on AI-driven specs, and deliver production frontend experiences clinicians will trust.

Build and own responsive, high-performance React + TypeScript web applications. Design frontend architecture, reusable components, state management, and data-fetching. Collaborate with product and backend teams, optimize performance and accessibility, and improve developer tooling and workflows. Contribute across the stack when needed.

The Senior Frontend Engineer will develop user-friendly and scalable components for a data labeling platform, collaborating with teams and mentoring junior engineers.

As a Senior Frontend Engineer II, you will optimize user experience, drive experimentation for growth, and improve the frontend architecture of an eCommerce platform while ensuring accessibility and reliability.

As the first dedicated frontend engineer, drive frontend architecture, build reusable design systems, ship React interfaces, and mentor engineers. Collaborate across teams to simplify workflows and define UI standards in a high-performance web application environment.

Lead frontend development initiatives, ensure user experience, architect flexible solutions, mentor junior developers, and collaborate with UI/UX and backend teams.

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 architecture and implementation of Aragorn AI's frontend: build scalable React/TypeScript applications, evolve micro-frontend architecture, develop and maintain a reusable design system, optimize performance, collaborate with design and backend teams, own CI/CD for frontend, and drive frontend technical standards and documentation.

The role involves developing large-scale applications using HTML, CSS, JavaScript, and React/WordPress, code reviews, and crafting UI components while ensuring high quality and accessibility.

The Senior Frontend Engineer will develop and enhance the Navigator platform using Vue.js, improve user experience, maintain CI/CD workflows, and collaborate with cross-functional teams.

As a Senior Frontend Engineer at Mozilla, you'll build user interfaces for Firefox, collaborate with teams, maintain code quality, and mentor peers while focusing on accessibility and usability.

The role involves building creative tools for content editing, enhancing features with PixiJS and WebGL, and improving collaboration workflows.

Own and evolve the front-end architecture for a high-throughput, real-time trading app using Next.js, React, and TypeScript. Build pixel-accurate, accessible, responsive UIs under strict performance budgets; optimize rendering, state management, data flow, and bundle size for sub-second interactions. Integrate with REST and WebSocket APIs, lead end-to-end feature development, set engineering standards, mentor engineers, and contribute across the stack when needed.

Lead development of a Shopify Headless storefront using React and TypeScript. Build pixel-perfect, accessible, performance-optimized eCommerce pages, implement Shopify Functions, integrate GraphQL APIs and third-party services, evolve a Storybook design system, and collaborate with designers, product, QA, and backend engineers to maintain best practices and documentation.

Lead the design and implementation of a flagship product, define technology best-practices, and mentor the product team while working with rich datasets from Fortune 500 clients.

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, you'll build the frontend Graph Semantic Layer with React and TypeScript, developing complex data visualizations and collaborating closely with design and product leadership.

As a Senior Frontend Engineer, you'll build and maintain a fraud prevention platform UI using ReactJS, collaborating with backend teams and ensuring code quality through tests and CI/CD processes.

Design, implement, and maintain frontend applications and internal tools. Own delivery of high-visibility features, collaborate with cross-functional teams, mentor peers, and ensure performant, accessible, polished user interfaces integrated with backend systems.

Design, implement, and maintain frontend and mobile applications for Trading API customers. Own high-visibility features end-to-end, ensure performance, responsiveness, accessibility, and mentor peers while collaborating with cross-functional teams.

Develop and maintain user interface elements, utilize Vaadin, and train team members on front-end development while focusing on customer experience solutions.

The Senior AI Frontend Engineer will design and implement user interfaces using modern web technologies, ensuring intuitive and elegant user experiences while owning features end-to-end, collaborating across teams to bridge AI capabilities with frontend design.