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

Build and maintain user-friendly web interfaces for expense and procurement products using React and TypeScript. Implement micro frontend patterns, integrate with backend services via Apollo/GraphQL, collaborate with designers and PMs on shared UI components and design systems, participate in code reviews, triage bugs, and improve frontend engineering standards and observability.

Build scalable, high-performance frontend solutions for growth funnels, landing pages, and marketing campaigns using React and TypeScript. Drive experimentation and A/B testing, collaborate with product, design, marketing and data teams to optimize user journeys, prototype ideas rapidly, and uphold frontend best practices, security, and compliance to improve acquisition and engagement.

Mochi Health seeks a Senior Front-End Engineer to build and own complex healthcare interfaces, ensuring a seamless user experience and managing client-side architecture. Responsibilities include collaborating with mobile teams, maintaining frontend reliability, and integrating AI into products.

The role involves leading front-end development efforts, mentoring team members, implementing innovative features, and collaborating with various teams to enhance user experiences across products.

Design, build, and maintain scalable frontend applications using Vue 3 and TypeScript. Own feature delivery from design through production, build reusable components and architecture, improve performance and accessibility, collaborate with backend teams on APIs, write tests, mentor engineers, and help shape frontend tooling, CI/CD, observability, and security practices.

As a Senior Frontend Engineer, you'll lead the development of frontend applications, crafting seamless user experiences and driving project implementation alongside cross-functional teams.

Develop user interfaces for web applications, collaborate with teams, mentor engineers, and ensure code quality and performance in a fast-paced environment.

Build responsive, performant React + TypeScript consumer products for blockchain payments. Develop scalable components, design systems, public SDKs/APIs, and testing frameworks. Collaborate cross-functionally to ship secure, accessible, high-quality Web3 payment experiences and improve frontend performance and developer tooling.

The Senior Fullstack/Frontend Engineer will architect and implement scalable frontend systems for AV mapping applications, collaborating with cross-functional teams to enhance user experience and performance in autonomous driving technologies.

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.

Own and build clinician-facing mobile and web frontends: improve UX, robustness, and performance. Architect scalable, offline-first interfaces; implement real-time voice/audio and deep device integrations; collaborate with Product Design; establish testing, monitoring, and best practices. Ship production mobile apps and modern web dashboards used in unreliable connectivity environments.

As a Senior Frontend Engineer, you'll design user interfaces, collaborate with teams, architect scalable solutions, and drive frontend best practices.

Build, maintain, and optimize scalable front-end systems and web experiences. Translate Figma designs into reusable components, support large-scale site migrations, improve performance, accessibility, and SEO, and work with cross-functional teams using modern workflows and AI-assisted tools.

As a Senior Software Engineer, you will lead frontend initiatives using React and React Native, collaborating with product and design to deliver user experiences, while mentoring teammates and shaping frontend architecture.

The role involves developing new user-facing features for LangSmith, optimizing components, and collaborating with developers and designers to enhance usability.

Join Dragonfly's talent network as a Senior Frontend Engineer. Connect with global portfolio companies in the crypto ecosystem.

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.

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

Own and scale quality infrastructure for web engineering during the migration from a monolith to microfrontends. Build shared testing frameworks, tooling, CI/CD quality gates, and metrics; shift coverage toward unit, component, integration, and contract tests; enable AI-driven testing workflows and agent verification; mentor engineers and drive adoption of quality practices across teams.

As a Senior Frontend Engineer, you will design and build web applications, owning major UI projects, collaborating with cross-functional teams, and optimizing performance for a seamless user experience.

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.

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

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

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

This role involves leading web platform initiatives, mentoring senior engineers, architecting web applications, and implementing technical strategies for improved performance.