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

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.

Build and enhance LangSmith frontend features: implement user-facing UI with React and TypeScript, create reusable components, translate designs into high-quality code, optimize performance, and collaborate with backend engineers and designers to improve observability and evaluation workflows for LLM applications.

Senior Front-End UI Developer (onsite in San Ramon) focused on UI development and test automation. Key responsibilities include working with Java, Selenium-driven automation, RESTful web services and API testing to deliver and validate front-end solutions on a 12-month contract.

Lead design and implementation of scalable, performant frontend architectures and reusable UI components for consumer apps. Own core user journeys, optimize performance and accessibility, set frontend standards, mentor engineers, drive architectural decisions, and use AI-first tooling to ship features at scale.

The Frontend Engineer will build AI-native interfaces, collaborate with design and product teams, and ensure frontend quality in a dynamic product environment.

The Senior Frontend Engineer will develop product capabilities, guide design decisions, establish architecture, mentor junior engineers, and ensure a high-quality user experience.

The Product Engineer (Frontend) will build user-friendly interfaces, work with users to iterate features, and collaborate with backend teams.

The Frontend Engineer will develop high-performance UI components, collaborate with designers, and influence frontend architecture decisions for an AI-driven healthcare platform.

The Frontend Engineer will develop reusable UI components with React and TypeScript, collaborating closely with design and product teams to enhance user experience, while potentially contributing to backend logic.

The Staff Software Engineer, Frontend will build high-performance user interfaces using React and TypeScript, collaborate on design and product, and influence frontend architecture decisions.

As a Frontend Software Engineer, you'll develop the agent-building platform, architect UI experiences, and lead implementation of features in a collaborative environment.

As a Senior Software Engineer, you'll lead projects, enhance product quality, and collaborate on technical strategies while building user-facing features.

The Front-End Engineer is responsible for developing and maintaining user-friendly web applications, collaborating with teams, optimizing performance, and writing clean code.

Lead frontend architecture and design systems in React/TypeScript, drive UX and interaction decisions for data-heavy scientific workflows, ship high-quality reusable UI, set frontend standards, mentor engineers, and integrate with backend services while prioritizing performance and accessibility.

Build high-quality interfaces using React and Next.js, own features end-to-end, collaborate with design, iterate on user feedback, and contribute to engineering culture.

Build and maintain frontend interfaces for a fintech product, collaborate across product/design/ops, own full-stack features end-to-end, design APIs and testing, and iterate on product to improve user financial tools.

The Frontend Engineer will develop scalable UI components for billing, collaborate with backend engineers, and enhance user experiences across OpenAI's financial platforms.

Architect and build the core frontend for a collaborative cloud platform, focusing on flexible infrastructure and technical roadmap features.

Architect and build frontend for a cloud platform, manage technical roadmap, create scalable infrastructure and components, ensure high-quality implementations.

As a Frontend Engineer, you will create intuitive web experiences, contribute to roadmaps, build flexible infrastructures, and implement designs from Figma.

Join Ema as a Software Engineer to design and develop user interfaces for web applications, collaborating with product managers and UX designers, and integrating APIs.

The Senior Software Engineer will lead frontend development, define architecture, own UX for workflows, mentor engineers, and collaborate with design and backend teams.

As a Senior Frontend Engineer, you'll architect and build payment experiences, maintain payment dashboards, and mentor engineers while driving frontend architecture decisions.

The Frontend Engineer will build user-facing features using React and TypeScript, develop interfaces, and innovate on AI-native interactions, overseeing features from concept to deployment.

Build and ship performant, polished React/TypeScript UIs that render large construction drawings and data-dense tables. Optimize frontend performance (canvas rendering, pan/zoom, fast tables), contribute reusable components, prototype with product/design, and diagnose rendering and state-management bugs.