182 senior frontend developer jobs at 129 companies in Cotati, CA
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Senior Frontend Engineer
San Francisco or New York City or United States
HybridFull Time
Beast Industries: Produces digital media and consumer goods for MrBeast brands.
8+ YOE8+ years software engineering with deep frontend experience in JavaScript/TypeScript, performance optimization, accessibility, AI-assisted tooling, architecture ownership, and mentoring peers.
JavaScript, TypeScript, React, Vue, Angular, AI coding agents, CI/CD
Baseten: Scalable infrastructure platform for deploying and serving AI models.
5+ YOE5+ years building production web apps; deep expertise in React and TypeScript; strong product intuition, UX empathy, cross-functional collaboration, and experience with modern frontend tooling.
Roger Healthcare: AI clinical documentation platform for home health clinicians.
6+ YOE6+ years frontend experience with deep mobile expertise; production mobile and web app experience; expertise with React/React Native, TypeScript, CI/CD; experience with voice/audio, device integration, offline-first systems, scalable UI architectures.
Weave Bio: AI platform for drug development regulatory workflows.
5+ YOE5+ years building web apps with React and TypeScript; experience with real-time collaboration, strong product instincts, startup experience, and productive use of AI-assisted engineering tools.
Plane: Open-source project management platform for planning and tracking work.
8+ YOE8+ years building large-scale web applications with TypeScript, JavaScript, React, strong frontend architecture, real-time collaboration, performance optimization, and leadership experience.
Krakow or San Francisco or Los Angeles or New York City or London or Singapore or Beijing or Seoul or Tokyo or Vancouver or Poland or North America or Europe or Asia or Africa or South America
RemoteFull Time
Sensor Tower: Provides digital market intelligence and mobile app analytics software.
4+ YOE4+ years engineering experience with JavaScript/TypeScript and React; ability to architect scalable frontend systems, design state management, write tests (Jest/Playwright), optimize web performance, mentor peers, and partner with product.
EvenUp: AI-powered document generation and analysis for personal injury law.
5+ YOE5+ years frontend experience, strong React and TypeScript skills, experience shipping customer-facing products, able to own technical decisions and work with Product and Design.
Halliday: Unified crypto payment infrastructure and agentic workflow protocol for blockchain.
2+ YOE2+ years building production frontends with React and TypeScript, strong frontend fundamentals (state management, API integration, responsive design, performance), product mindset, collaboration skills, and willingness to be based in SF Bay Area or NYC.
San Francisco or Ottawa or Phoenix or Toronto or Los Angeles or Denver or Salt Lake City or Atlanta or Chicago or Houston or Portland or New York City or Vancouver or San Diego or Washington, D.C. or Sacramento or Jacksonville or Seattle or Mexico City or Austin or Miami or Boston or Dallas
$124k-$226k/yrHybridFull Time
Scribd: Subscription-based digital library for e-books, audiobooks, and documents.
6+ YOERequires 6+ years of frontend software engineering experience, JavaScript/TypeScript and React expertise, modern web framework experience, architecture knowledge, performance optimization, testing, and strong collaboration skills.
Siteline: Provides billing and payment software for construction trade contractors.
4+ YOE4+ years software engineering experience; strong React and TypeScript skills; full-stack fluency including Postgres and API debugging; experience with GraphQL/Apollo, MaterialUI, and shipping end-to-end product features.
San Francisco or New York City or Portland or Canada or United States
$167k-$208k/yrRemoteFull Time
Mercury: Banking services and financial software designed for startup companies.
4+ YOE4+ years frontend experience with React and TypeScript, design system experience, strong accessibility/performance focus, familiarity with CI/CD and testing, and fluency with AI-enabled tooling.
Embedding VC: Venture capital firm backing early-stage generative AI startups.
3+ YOE3+ years front-end experience, strong React and TypeScript skills, experience leading high-performance web initiatives, UI architecture and state management, experience with complex editor/canvas interactions.
Clera: AI talent agent matching professionals with high-growth startup roles
5+ YOE5+ years production Kubernetes infrastructure experience; strong frontend fundamentals with Next.js, React, Tailwind, shadcn/ui; Convex for real-time UIs; Terraform, Helm, ArgoCD; Prometheus, Grafana; Go proficiency; GitOps and observability experience.
Aechelon Technology: Produces 3D simulator content and visual simulation systems.
8+ YOE8+ years software development; BS/MS in CS or equivalent experience; expertise with React, TypeScript, Electron, WebSockets, RESTful APIs; experience with performance-sensitive real-time applications and C/C++ preferred.
React, TypeScript, Electron, WebSockets, RESTful APIs, C, C++
Edison Scientific: Developing autonomous AI agents for scientific research and discovery.
4+ YOERequires 4–8 years of frontend engineering experience, deep JavaScript, React, and TypeScript expertise, browser performance optimization, real-time data handling, visualizations, design systems, accessibility, and responsive design.
Sift: Software platform for high-frequency hardware telemetry observability.
8+ YOE8+ years engineering experience, strong frontend skills (React/NextJS/TypeScript), high-performance web app and browser optimization experience, product ownership and customer-facing collaboration, U.S. person required.
New York City or San Francisco or London or Sydney
$170k-$240k/yrOnsiteFull Time
Sigma Computing: Cloud-native analytics platform featuring a spreadsheet-style interface.
5+ YOE5+ years industry experience, strong CS fundamentals, front-end expertise with React, GraphQL, TypeScript and Node.js, design focus and experience with large-scale data web apps preferred.