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

Lead frontend architecture and platform work, build reusable component libraries and tooling, deliver AI-driven user features for security workflows, mentor engineers, and ensure scalable, high-quality frontend infrastructure and UX.

Own the frontend architecture for the member-facing product, ensuring high-quality interfaces, performance, and innovative AI integration.

Build high-performance, real-time Angular frontends for AI-driven agent interfaces. Implement SSE/WebSockets streaming, complex state management with Signals/NgRx, visualizations of agent chain-of-thought, human-in-the-loop controls, performance optimizations, and collaborate with backend/AI engineers on API schemas.

Build high-performance, real-time Angular UIs for AI-driven agent workflows. Implement SSE/WebSocket streaming, complex state management (Signals/NgRx), observability dashboards, HITL controls, performance optimizations, and collaborate on API/JSON schema design with backend and AI engineers.

Design and implement high-performance Angular frontends for AI-driven interfaces: real-time SSE/WebSocket streaming, complex state with Signals/NgRx, Chain-of-Thought visualizations, human-in-the-loop controls, performance optimization, API schema collaboration, and testing.

Own frontend architecture and platform for a unified web console. Build identity-adjacent systems (auth, sessions, CORS/CSRF protections), shared infra and tooling, testing strategies, and enable other teams to ship reliable UIs. Collaborate across design, growth, and infrastructure; participate in on-call rotation.

Build, sharpen, and scale real-time frontend features for an AI-native labor orchestration platform. Ship production React/TypeScript UIs, maintain component libraries, ensure testing, performance, accessibility, and cross-browser compatibility while working closely with core engineering and AI teams.

We are seeking a Senior Frontend Software Engineer to build advanced web applications using JavaScript and ReactJS, collaborating with a team to enhance user experiences.

Design, develop, and maintain web applications, ensuring high quality and user-friendly interfaces while collaborating with the team and integrating APIs.

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.

Build and maintain shared frontend infrastructure, design system, and developer tooling to improve developer velocity, performance, reliability, and scalability. Partner with product, design, and infra teams to define frontend architecture, drive adoption of platform systems, and reduce lifecycle friction across Harvey's user-facing applications.

Design and implement developer-facing UI from Figma to production using Hotwire (Turbo + Stimulus) and ViewComponents. Own the dashboard, API playgrounds, docs, marketing site, and data visualization. Optimize performance and bundle size, maintain a coherent component system, and ship polished, production-ready front-end with tests and CI/CD.

The Staff Frontend Engineer will lead frontend system development, architect scalable solutions, mentor engineers, and drive best practices while collaborating cross-functionally.

As a Staff Front End Engineer, you will lead the front end vision, drive architecture decisions, and mentor engineers while developing high-impact web applications in a collaborative environment.

Design and build responsive, high-performance front-end interfaces for AI-driven finance workflows. Translate complex data into clear visualizations, balance automation with human control, collaborate with backend and AI teams, and own frontend architecture and design system standards.

Senior front-end engineer responsible for developing products end-to-end, owning projects from concept through launch, and shaping company direction to drive growth across portfolio companies.

As a Senior Frontend Engineer, you'll lead technical direction for products, maintain design systems, collaborate across teams, and mentor engineers.

Seeking a Senior Frontend Engineer with 5-7 years of experience to lead development, design systems, and build user-friendly interfaces.

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

Build and own frontend features for an AI-native automated testing platform using TypeScript and React. Solve ambiguous product and technical problems, ship high-quality code, collaborate with a small founding team, and work in-person in San Francisco.

Design and build high-performance, responsive frontend web and desktop applications (React/TypeScript/Electron). Drive frontend architecture and implementation decisions, integrate real-time bidirectional data (WebSockets), optimize for speed/security/scale, collaborate with UI/UX and backend teams, and mentor engineers to improve frontend engineering practices.

Lead frontend architecture and technical strategy for a collaborative work platform. Build scalable React/TypeScript applications, design systems, real-time collaboration (sync, offline, serialization), optimize performance and observability, mentor engineers, and collaborate with Product, Design, and Backend teams to deliver high-quality, maintainable user experiences.

Own front-end architecture and build React + TypeScript applications for Device OS. Focus on performance, accessibility, real-time data, REST integration, design systems, testing, and cross-functional collaboration. Mentor engineers, conduct reviews, and deliver scalable, responsive UIs for field-deployed devices.

The Sr/Staff Frontend Engineer will develop new web applications, enhance UI experiences, architect solutions, and collaborate with various stakeholders to ensure a scalable and secure platform.

Lead frontend development for Sift Agents, building high-performance, agentic AI user experiences. Own product area from customer discovery through shipping, design interaction patterns for streaming and long-running agent tasks, render agent findings alongside large telemetry datasets, optimize browser performance (Web Workers, OPFS, WebAssembly), contribute to component library, and collaborate with backend engineers on API design.