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

Design and build user-facing features for a live video chat and multiplayer gaming platform. Collaborate with designers and product managers, lead technical quality and scalability efforts, rapidly experiment, and solve customer problems through deep user understanding. The role focuses on front-end architecture using TypeScript and React, with Node.js proficiency and strong CSS fundamentals.

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.

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.

Volunteer Principal Front End Developer to build React/React Native web and mobile features, mentor engineers, implement scalable full‑stack solutions, ensure cross‑browser compatibility and testing, work with Node/MongoDB/AWS, attend weekly standups, and support a fundraising launch. Minimum 4 hours/week commitment.

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.

Build Gamma’s AI-powered, real-time collaborative editor using CRDTs and WebSockets. Develop full-stack AI features, optimize frontend performance, implement polished interfaces, contribute to open-source projects, and design APIs with backend engineers. The role requires close collaboration with designers, product managers, and backend engineers to create fast, intuitive web experiences at scale.

Build and maintain responsive, accessible React/NextJS web interfaces and support Chrome extension development (Manifest V3). Integrate with backend APIs or WebSockets, optimize performance, write tests, perform code reviews, monitor and document extension and web app behavior, and collaborate with cross-functional teams.

Build, test, and optimize responsive web applications using Next.js and React. Collaborate with designers and back-end developers, implement UI/UX designs, write clean maintainable code, and debug front-end issues to ensure high performance across devices and browsers.

Develop and lead enterprise-scale React and TypeScript frontend applications for SS&C’s Geneva platform. Responsibilities include frontend architecture, reusable component and design-system development, performance optimization, API integration, testing strategy, observability, security, deployment optimization, code reviews, technical standards, mentoring, and collaboration with UX, business analysts, and QA teams.

Build and own frontend applications for DeFi products using Next.js and TypeScript. Develop reusable component libraries and design systems, integrate Solana programs and wallet infrastructure, and translate complex financial concepts into accessible interfaces. Own performance, reliability, observability, testing, analytics, and end-to-end feature delivery while collaborating with protocol engineers, designers, and product teams.

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.

Lead the evolution of Seeq’s frontend infrastructure, including React systems, component libraries, state management, styling architecture, and reusable application patterns. Drive large-scale refactors, improve developer experience, ensure accessibility and performance, evaluate open-source tools, and establish technical standards adopted across teams. Collaborate with designers, product teams, and engineers through architecture reviews, documentation, code reviews, mentoring, and cross-team delivery.

Build and ship frontend features for a financial marketplace using React and Next.js. Collaborate with product, design, and backend engineers; contribute to architecture, component design, code quality, tooling, and the shared component library. Own work from design through delivery, participate in pairing and code reviews, and use AI-assisted development tools thoughtfully.

Build and release customer-facing web interfaces, dashboards, analytics views, and configuration tools using React and TypeScript. Collaborate with backend and full-stack engineers, engage directly with customers during onboarding and troubleshooting, and turn feedback into usability improvements. Own frontend architecture decisions and deliver production-quality code in a fast-paced startup environment.

Lead frontend engineering for large-scale React web applications. Architect application patterns, structure, libraries, and coding standards; build React applications end to end; conduct code reviews; mentor engineers; promote performance, scalability, and maintainability; and collaborate with designers, product managers, and technical and non-technical stakeholders.

Lead front-end engineering for enterprise transportation applications using React, TypeScript, and Material UI. Responsibilities include front-end architecture, reusable component development, accessibility, responsive design, API integration, SQL troubleshooting, testing, CI/CD, code reviews, mentoring, Agile planning, modernization, and production support. The role independently leads features from requirements through deployment while collaborating with designers, product owners, analysts, engineers, testers, DevSecOps teams, and government stakeholders.

Build the realtime, HIPAA-compliant messaging and collaboration frontend ('Pulse') that makes an AI colleague feel human. Implement complex interactive data visualizations, micro-interactions, and high-performance accessible interfaces. Work embedded with product and design, own UI quality, iterate on AI-driven specs, and deliver production frontend experiences clinicians will trust.

Lead frontend and full‑stack projects across Marimo's open-source ecosystem. Design simple, powerful editor experiences, build performant data visualizations and editor extensions, engage with the community, triage issues, and balance community needs with product roadmap.

Build and ship customer-facing web features using React, Next.js, and TypeScript. Own frontend quality across performance, accessibility, responsiveness, component consistency, and polished user interactions. Partner closely with design and product, contribute to the marketing site, use AI coding tools to accelerate delivery, and help establish frontend standards and practices as the team grows.

Design, build, and deliver front-end features with strong UX focus. Own technical design, coding, testing, deployment, and monitoring in a continuous delivery, microservices environment. Collaborate with Product, implement automated QA practices, and contribute to production deployments while practicing robust testing methodologies.

Design, build, deploy, and maintain secure, scalable Java and Spring Boot services for a multi-tenant ecommerce SaaS platform. Develop REST APIs, optimize MySQL databases, operate AWS workloads, and support CI/CD, observability, testing, and production systems. Contribute to architecture and technical decisions, mentor engineers, troubleshoot issues, and participate in on-call support while ensuring PCI DSS compliance and responsible use of AI-assisted development tools.