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

The role involves designing and developing software solutions, unit testing, and collaborating with various teams to improve customer experience using rich data sets.

The Front End Java engineer will design and develop software using Java and JavaScript, with expertise in MVC frameworks like Backbone.js, focusing on the Unified project's Browse front end pages.

The Sr. Software Engineer (Front End) will design and develop front-end solutions using various frameworks, ensure performance optimization, and guide TDD best practices.

The Senior Front End Engineer will utilize expert knowledge of JavaScript and web technologies to develop user interfaces, ensuring quality and performance. They will work with various JavaScript libraries and handle service-based architectures, while focusing on responsive design and mobile web development.

As a Senior Frontend Engineer, you'll build high-performance applications, collaborate with teams on user experience, and ensure coding security.

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.

Lead full‑stack engineering projects to scale document ingestion, design multi‑jurisdiction data collection, and build government‑grade security. Deliver AI‑native features across web, desktop, mobile, editors, and APIs. Ship full‑stack solutions using React/TypeScript frontend and Python/Postgres backend while ensuring scalable, extensible architectures that delight enterprise customers.

Own and architect the frontend foundation for Handshake AI Enterprise: establish component system, design tokens, engineering patterns, shared libraries, and ship production-grade UIs while collaborating with AI and platform teams to ensure scalable, maintainable, high-performance enterprise deployments.

Build frontend experiences for autonomous AI agents, including conversational interfaces, memory and context views, live run timelines, approval flows, worker configuration, and reusable agentic components. Develop real-time interfaces using streaming, WebSockets, and server-sent events while managing complex client state, reconnection, partial results, and failure recovery. Collaborate with backend and agent engineers to shape APIs and deliver fast, accessible, polished products.

Build polished, user-facing interfaces for novel human-computer interaction workflows using React and TypeScript. Translate product concepts and designs into intuitive UX flows, prototype and test experiences, improve onboarding and session journeys, analyze user behavior, and establish frontend patterns and component systems. The role emphasizes accessibility, performance, responsiveness, motion, visual quality, and close collaboration across design and engineering.

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.

The Frontend Engineer will build user-facing interfaces for AI software development, utilizing technologies like TypeScript and React, while ensuring code quality and user experience.

Build elegant, responsive frontend features and visualizations using modern frameworks. Own substantial product areas from design to launch, collaborate with product, UX, and backend teams, and optimize performance and interactivity for large-scale data applications.

Implement test-driven frontend features from visual designs using AngularJS/JavaScript. Integrate UI with RESTful backends, refactor modules, perform peer code reviews, and collaborate with backend, QA, and support teams in an Agile environment.

Design and build user-facing web interfaces from mockups using HTML, CSS, and JavaScript. Implement interactive features, ensure responsive and accessible cross-browser experiences, optimize performance, test and debug code, maintain existing applications, and collaborate with back-end developers for integration.

Lead end-to-end implementation of high-fidelity, performant, and accessible frontend features for a realtime collaborative visual canvas. Translate designs into polished interactions, optimize performance and accessibility, collaborate with PMs, designers, and backend engineers, and shape frontend best practices and design systems.

Build and implement user-facing web interfaces from designs using HTML, CSS, and JavaScript. Create interactive, responsive, and accessible features, optimize performance, ensure cross-browser compatibility, test and debug code, maintain existing applications, and collaborate with back-end developers for integration.

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.

Own and build the JTX frontend across web and mobile: real-time order books, charts, order entry, positions, wallet/signing flows. Optimize for low-latency streaming data, performance, security, and cross-platform consistency while making long-term architectural decisions and shipping rapidly.

Lead frontend architecture and execution for high-traffic Search features using React and TypeScript. Build map-based visualizations, optimize client-side performance and state management, collaborate with product/design/backend, conduct code reviews, mentor peers, and ship production-grade web features.

Build and maintain responsive, accessible frontend interfaces using React and TypeScript. Collaborate with product, design, and backend teams to launch performant, scalable UIs, create reusable component libraries, define APIs, mentor engineers, and drive frontend best practices.

Develop and enhance user-facing features for an LLM observability platform using React and TypeScript. Build reusable components and front-end libraries, translate designs into performant UI code, optimize cross-device/browser performance, and collaborate with backend engineers and designers to improve usability.

Build and maintain a shared frontend platform and design-to-production pipeline: application shell, data layer, routing, auth, component library, agent-driven code generation, observability, and packaging so product teams ship without hand-writing frontend code.

Lead development of interactive React front-ends with Chakra UI and Mapbox, build data visualizations (Plotly/ApexCharts), optimize performance for large and real-time datasets, enforce front-end best practices, mentor engineers, and collaborate with product, design, and backend teams to deliver accessible, responsive interfaces.