Top Senior Front End Developer Jobs in San Francisco Bay Area, CA

Build and operate a frontend-focused engineering platform for AI autonomy workflows. Responsibilities include designing composable UI architecture, typed and versioned APIs, application lifecycle workflows, AI-agent integrations, backend services, and consistent local and production environments. The role partners with simulation, autonomy, and ML experts while collaborating across infrastructure, security, product, and design. Engineers own production applications through design, implementation, deployment, and support.

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 support production full-stack applications with a frontend focus using TypeScript and React. Design intuitive interfaces for simulation, synthetic data, testing, evaluation, and autonomy workflows. Integrate APIs and backend services, improve performance and accessibility, test complete user workflows, and create reusable components and extension points. Collaborate closely with developers, product, design, and domain experts to deliver reliable applications across local, cluster, edge, and air-gapped environments.

Build and operate scalable backend account and identity systems using Golang and gRPC. Responsibilities include registration, authentication, authorization, MFA, social login, identity-provider integrations, APIs, data models, performance optimization, incident resolution, technical roadmap execution, code reviews, mentoring, and production ownership. The role also involves collaborating cross-functionally, improving architecture and developer tooling, and applying AI technologies within a regulated healthcare environment.

Build high-performance, scalable frontend applications using React, Redux, JavaScript, HTML, and CSS. Collaborate with design and product teams to deliver user-focused features, participate in product decisions, improve team efficiency, and write secure, maintainable, testable code. The role requires strong UX sensibilities, independent decision-making, effective communication, and application of OWASP security practices.

Build and maintain fast, intuitive frontend applications for blockchain and Web3 products. Collaborate with product, design, and engineering teams; develop reusable components and frontend architecture; integrate wallets and smart-contract interactions; improve performance, reliability, and accessibility; participate in technical planning and code reviews; mentor other developers and establish frontend best practices.

Lead frontend-focused full-stack development for a neurotechnology platform controlling brain stimulators, managing patient data, visualizing real-time 3D data, integrating APIs, syncing cloud systems, and improving user experience. The role involves React and React Native frontend work, Python or Node.js backend development, team growth and mentorship, and collaboration on secure, scalable healthcare applications.

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.

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.

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 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 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.

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.

Develop and maintain responsive Angular web applications using Angular 19+, Signals, Reactive Forms, and modular component architecture. Build complex forms, integrate REST APIs with RxJS, optimize change detection and performance, and create unit tests with Vitest or Jest. Collaborate with design, backend, and product teams, troubleshoot cross-browser issues, participate in code reviews, and follow modern front-end development practices.

Owns the design, development, security, performance, and scalability of Cerby’s cross-browser Manifest V3 extension. Builds React and TypeScript experiences across extension surfaces, manages service-worker synchronization and authentication workflows, and ensures secure credential handling. Responsibilities include dependency and supply-chain security, testing, observability, code reviews, mentoring, cross-functional collaboration, and production delivery in an agile remote environment. The role also promotes responsible AI-assisted development practices.

Design, develop, and enhance custom SAP Fiori/UI5 applications; configure Fiori Launchpad; integrate OData services; perform UI debugging, performance optimization, code reviews, unit testing, and documentation while collaborating with backend and functional teams.

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 Gallatin’s Vue-based Navigator frontend, including reusable UI components, design-system primitives, offline Progressive Web App functionality, API integrations, testing, and CI/CD improvements. Ensure reliable desktop and iPad experiences, troubleshoot API and CORS issues, contribute to architectural decisions, and collaborate with product, design, and backend teams. The role also involves documentation, demos, cross-functional troubleshooting, and potentially mentoring junior engineers.

Build and shape front-end web applications for a rapidly growing B2B2C SaaS parking platform. Make architectural and design decisions, improve user experience, contribute productively with AI assistance, and help establish engineering practices in a startup environment. The role requires strong commercial front-end experience and collaboration with engineering leadership. Remote work is available, but occasional travel to San Francisco is required.

Architect and build a high-performance trading platform for active traders. Develop responsive web interfaces integrating real-time market data, low-latency execution workflows, and advanced trading tools. Collaborate with cross-functional engineering teams on large-scale initiatives, emphasizing scalability, performance, API quality, maintainability, developer experience, and end-user usability.

Build and maintain Zuora’s shared React and TypeScript component library, design system, and developer tooling. Develop accessible, tested, reusable UI components and customer-facing product features; collaborate with Design and product teams; support Storybook documentation, visual regression testing, releases, and adoption. Create AI-assisted development workflows, review code, improve developer experience, mentor engineers, and uphold quality, performance, and accessibility standards across globally distributed teams.