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

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.

Develop and maintain scalable Java and Spring Boot REST services, APIs, and microservices for mission-critical geospatial systems. Support containerization, orchestration, CI/CD, DevOps automation, testing, infrastructure deployment, data platforms, and third-party integrations. Contribute to architecture, performance optimization, troubleshooting, documentation, stakeholder demos, and Agile delivery. The role requires onsite work in Herndon, Virginia and collaboration on national security missions.

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.

Develop and maintain iOS, Android, and web development platforms for the myQ connectivity program. Lead technical planning across scrum teams, translate product requirements into software designs, implement complex features, oversee releases, improve development processes, and enforce quality standards. The role mentors engineers, leads offshore teams, collaborates with product, architecture, DevOps, firmware, infrastructure, and QA teams, and contributes to architectural decisions, technical documentation, interviews, and continuous improvement.

Senior frontend-focused software engineer responsible for authentication, verification, and fraud experiences across web, mobile, and backend systems. The role owns team goals, designs and delivers highly available systems, collaborates with product and design partners, improves engineering standards, supports operations and on-call efforts, and mentors engineers. Candidates should have strong web application architecture experience, proficiency with React or Vue and JavaScript or TypeScript, and excellent communication skills.

Build responsive Web3 applications, web SDKs, developer tools, reusable frontend components, and internal Customer Success tools. Collaborate with Product, Design, and Engineering to create scalable, accessible user experiences. Contribute to code and design reviews, automated testing, continuous delivery, coding standards, and AI-assisted development practices.

Develop and maintain scalable, customer-facing frontend web applications for healthcare professionals. Own design, development, testing, and maintenance; collaborate with API, product, QA, and UI/UX teams; ensure performance, security, observability, and regulatory compliance; contribute to architecture, technical direction, innovation, and engineering mentorship. Vue.js expertise, AWS proficiency, DevOps practices, and regulated-industry experience are advantageous.

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.

Lead and deliver frontend engineering projects: build scalable progressive web apps, maintain the design system, collaborate with designers, researchers, and product teams, ensure UI excellence and high-quality frontend code across products.

Build and ship AI-native frontend experiences using React, Next.js, TypeScript, and Tailwind. Architect scalable frontend systems, reusable components, state management, API integrations, and performance optimizations. Own user-facing features end to end, bridge AI capabilities with intuitive interfaces, and collaborate across product, design, and backend engineering. Rapidly prototype with AI tools while maintaining high standards for accessibility, visual polish, responsiveness, and production quality.

Build and ship production frontend features for AI-native enterprise workflows. Develop React UI components, integrate backend APIs, work within component libraries, and learn scalable frontend architecture, state management, performance optimization, and advanced React patterns. Collaborate with designers and backend engineers, use AI development tools, iterate based on user feedback, and receive mentorship from senior engineers.

Build responsive, accessible, and performant front-end interfaces for MeshMesh. Translate design mockups into production-quality code, maintain shared component libraries and front-end patterns, and advocate for consistent design quality. Partner closely with product designers to deliver polished user experiences. The role requires modern front-end framework expertise, strong interaction-design judgment, and experience using AI coding tools such as Claude.

Build and maintain React.js interfaces across SPREEAI’s Partner Portal, Shopify onboarding flow, demo site, and Rescale App. Collaborate with backend engineers on API contracts, own frontend performance and accessibility, translate onboarding requirements into shipped features, and help establish engineering practices, testing standards, and component patterns. The role requires strong frontend ownership, polished customer-facing experiences, and effective communication in a fast-moving environment.

Build and maintain high-performance connected-device (Roku) frontend applications. Contribute to shared client architecture, reusable frameworks, and tooling. Optimize startup, memory, responsiveness, and playback. Collaborate with product, design, QA, and engineers; participate in code reviews, troubleshooting, documentation, and mentoring to improve code quality and cross-platform consistency.

Build and enhance Ramp’s marketing website, brand design system, and reusable component library. Partner with designers, engineers, paid advertising, and growth teams to create interactive experiences, conduct landing-page A/B tests, and drive lead generation. The role requires strong frontend and design engineering skills, responsive design expertise, and close attention to implementation details.

Own end-to-end frontend development for core crypto payment flows across web and mobile. Improve latency, availability, and SLOs; build user-facing features (contacts, real-time transaction status); identify and fix performance bottlenecks; partner with product/design/backend; mentor junior engineers to reduce customer friction at scale.

Own frontend product development for business software, including design-system and frontend architecture evolution, user experience improvements, feature delivery, and development workflow enhancements. Collaborate with product, operations, and nontechnical partners while owning projects from problem definition through delivery. Build dashboards, portals, and user-facing applications using React and JavaScript or TypeScript.

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.

Design and develop frontend interfaces using React and Next.js, lead projects, and enhance user experiences through collaboration with founding team and users.

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.

Architects, builds, documents, and maintains cross-platform design system foundations and web components. Owns repositories, release workflows, CI pipelines, automation, testing, documentation, and adoption measurement. Leads AI-assisted engineering workflows and governance while coaching contributors, supporting product teams, ensuring accessibility, and mentoring engineers. Collaborates closely with designers and engineers across platforms and helps migrate components into consuming applications.

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.

Develop and scale the Lightning AI platform’s frontend and UI infrastructure using React and Redux. Build end-to-end features, improve stability and performance, evaluate technical architecture, automate software delivery, reduce technical debt, and mentor engineers. Collaborate with engineering, product, and design teams in a rapidly changing SaaS environment while maintaining high standards for code quality and system design.

Build and maintain production-grade frontend features for an agentic product security platform using TypeScript, React, and Next.js. Develop accessible, performant interfaces for security findings, investigations, remediation workflows, dashboards, forms, tables, and data-heavy views. Create reusable UI patterns, robust validation flows, and type-safe data integrations while contributing to frontend testing, architecture, accessibility, code reviews, and product decisions.

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.