Front End Developer Jobs in Sunnyvale, CA

The Staff Frontend Engineer will design the UI for a high-performance datacenter infrastructure platform, optimizing for speed and handling complex datasets. Responsibilities include building applications, collaborating on API design, and establishing frontend architecture.

The role involves building and redesigning web applications, focusing on client-side development, UI design, and implementing scalable frameworks.

Founding front-end engineer to design and build Flick's editor UI (canvas, timeline, node graph, playback). Lead architecture, prototype creative workflows, optimize complex UX interactions, establish code quality and performance practices, collaborate with design/product/AI backend, and drive key technical and product decisions.

Lead design and implement AI-powered fullstack/frontend features and UI frameworks for an enterprise Generative AI assistant. Architect web stacks (auth, event tracking, platform, design systems), promote best practices, collaborate with product and ML teams, and scale product adoption across customers and markets.

Lead development of AI-powered enterprise platforms, focusing on full-stack web development, UI/UX design, and data visualization.

Develop and modify custom Jive templates for Jive 6.0 using Soy and Freemarker. Translate requirements and wireframes into front-end code (JavaScript), ensuring attention to detail and clear communication.

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.

The role involves developing high-quality, low-latency user experiences for web applications, collaborating with various teams, and utilizing web technologies effectively.

The Front End Developer will design UI frameworks and implement user experiences, converting UX requirements into high-quality HTML, JS, and CSS, while collaborating with designers and backend engineers.

Lead development of high-performance, accessible frontend web applications that visualize large geospatial and time-series energy datasets. Collaborate with UX and AI teams, own feature implementation, maintain component libraries, enforce testing and frontend standards, and translate product designs into scalable architectures.

Design and implement high-performance, accessible browser visualizations for profiling data. Build reusable interaction patterns, optimize responsiveness and memory for large datasets, integrate rendering technologies and WebAssembly, and collaborate with backend, product, design, and QA to ship complete user workflows.

Design and develop microarchitecture and RTL for wafer-scale AI chips. Lead functional specification, RTL development, synthesis and front-end integration. Collaborate with physical design, verification, DFT, software and systems teams to meet PPA goals. Debug silicon-level functional, timing, and power issues and manage third-party IP and vendor interactions to deliver production silicon.

Build scalable, accessible frontend components and UX for an AI-native data platform using React and Next.js. Implement dashboards, agent interfaces, and multi-tenant admin panels; integrate real-time and streaming data, APIs, and visualize high-dimensional data. Contribute to component libraries, design systems, and ship production-ready, responsive features.

Develop front-end applications utilizing WPF and web technologies. Require strong knowledge of HTML5, CSS3, and JavaScript with 5-7 years experience.

Seeking a Front-End Developer with 5-7 years of experience in development, proficient in WPF and front-end web technologies including HTML5 and CSS3.

Lead and implement Cheiron's frontend: own architecture, component patterns, and design system; build production-quality React/TypeScript/Tailwind UIs; solve AI-specific UX challenges (streaming, citations, long-running tasks); perform design QA; review and mentor engineers; collaborate across Product and Design to deliver polished, performant interfaces.

Design and build high-performance React applications, lead technical design for features, improve frontend reliability, and mentor engineers.

As a Senior Frontend Engineer II, you will optimize user experience, drive experimentation for growth, and improve the frontend architecture of an eCommerce platform while ensuring accessibility and reliability.

Build and ship a collaborative document platform: design and implement a rich, real-time multiplayer editor using TypeScript and React, partner with Product and Design, drive technical direction, ensure high-quality, well-tested frontend code, and iterate based on customer feedback.

Develop scalable front-end systems for complex web applications, ensuring security and performance while collaborating with teams.

Lead frontend development for an AI-driven finance automation platform: build a scalable React+TypeScript design system and interactive UIs (workflow builders, action libraries, observability dashboards, data type management), integrate REST APIs, collaborate with product/design/backend, and own features end-to-end while providing backend support when needed.

Maintain and enhance the FortiSwitch web GUI by locating and fixing bugs, proposing and implementing new features, writing i18n/a11y-compliant HTML/JS/CSS (TypeScript/SCSS), interfacing with backend C code, drafting functional specs, and improving performance and codebase maintainability.

Architect, design and implement features for RISC-V CPU core generators using Chisel, with responsibilities in verification and performance modeling, collaborating with teams.

The Staff Software Engineer will architect and maintain Datagrid Pages and Dataset Editor, focusing on UI design, efficient code, and mentorship while collaborating with teams to support Procore's AI strategy.

Lead verification strategy and execution for CPU frontend in high-performance out-of-order cores. Define test plans, checkers, assertions, coverage, and stimulus for branch prediction, instruction fetch, redirects, recovery, and MMU/ITLB interactions. Partner with architects, RTL, performance, and verification teams, apply simulation, formal, and emulation methods, drive block- and core-level signoff, mentor engineers, and build reusable DV infrastructure and methodology.