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217 senior frontend engineer jobs at 147 companies in Fairfield, CA

2mo
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Senior Frontend Engineer, Business Systems
San Mateo, California, United States
$180k-$280k/yr OnsiteFull Time
Verkada
Verkada: Sells integrated AI-powered cloud physical security hardware and software.
4+ YOE4+ years frontend software engineering; shipped customer-facing products or internal tools; startup pace; strong customer experience focus; modern frontend frameworks; bonus Salesforce/NetSuite/HRIS experience
Frontend frameworks, Salesforce, NetSuite, HRIS
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1mo
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Senior Frontend Engineer
San Francisco or New York City
$150k-$250k/yr OnsiteFull Time
Halliday
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.
React, TypeScript, Workflow Protocol, ethers.js, viem, wagmi
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Senior Frontend Engineer, Platform
San Francisco or Toronto or United States or Canada
$190k-$249k/yr RemoteFull Time
EvenUp
EvenUp: AI-powered document generation and analysis for personal injury law.
5+ YOE5+ years engineering experience, building production-quality software; ownership of projects end-to-end; experience with frontend systems for deploying LLM-based algorithms; strong communication, mentoring, and cross-team collaboration skills.
LLM, Kubernetes
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Senior Frontend Engineer
San Francisco or New York City or United States
HybridFull Time
Beast Industries
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
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3mo
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Senior Frontend Software Engineer - Marketplace
San Mateo, California, United States
$197k-$243k/yr HybridFull Time
Roblox
RobloxNYSE: RBLX: Platform for creating and playing user-generated 3D digital experiences.
3+ YOESenior frontend engineer with 3+ years experience in React/React Native, strong UX focus, cross‑platform delivery.
React.js, React Native, JavaScript
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Senior Frontend Engineer
San Francisco or New York
$190k-$300k/yr HybridFull Time
Baseten
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.
React, TypeScript, Tailwind CSS, Next.js, WebSockets
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Senior Frontend Engineer
San Francisco or Tucson or Dallas
$170k-$230k/yr HybridFull Time
Roger Healthcare
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.
React, React Native, TypeScript, CI/CD, LLM
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2d
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Frontend Engineer, Platform
San Francisco or New York City
$130k-$220k/yr HybridFull Time
Doppel
Doppel: Provides AI-native defense against digital social engineering and impersonation.
5+ YOE5+ years of software engineering experience with deep React and TypeScript expertise, production web application experience, and frontend platform ownership. Strong communication and autonomous product mindset required.
React, TypeScript, Relay, GraphQL, Figma, Storybook
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Staff Frontend Engineer
San Francisco, California, United States
$190k-$250k/yr HybridFull Time
Lunar
Lunar: Building an AI-native information system for hospitals.
10+ YOE10+ years frontend engineering experience; expertise with TypeScript, JavaScript, React, HTML/CSS, GraphQL; experience building real-time, performant UIs; familiarity with Elixir, Phoenix, Postgres, and AWS preferred.
TypeScript, JavaScript, React, HTML, CSS, GraphQL, Elixir, Erlang, Phoenix, Postgres, AWS
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2mo
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Mid/Senior Frontend Developer
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
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.
JavaScript, TypeScript, React, TanStack Query, React Router, Zustand, Redux, MobX, Next.js, Jest, Playwright, Highcharts, Ruby on Rails, Angular, ClickHouse, MongoDB, PostgreSQL, GitHub
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4d
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Senior Frontend Engineer
San Francisco, California, United States
$244k-$292k/yr OnsiteFull Time
Kikoff
Kikoff: A profitable fintech providing products that help consumers build credit, access liquidity, and save money.
5+ YOE5+ years of industry experience, SolidJS production experience or deep React experience, data analysis, business insight, strong problem-solving skills, and computer science fundamentals.
SolidJS, React
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2w
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Senior Staff Engineer - Frontend
San Francisco or Hyderabad
OnsiteFull Time
Plane
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.
TypeScript, JavaScript, React.js, HTML5, CSS3, Next.js, Tailwind CSS, MobX, REST, GraphQL, WebSockets, ProseMirror, Tiptap, Electron, Python, Go, Elixir, PostgreSQL, Redis, AWS, Kubernetes, Rancher, DataDog, Sentry, GitHub, Slack, Plane, Figma, Whimsical
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1w
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Senior Frontend Engineer
San Francisco, California, United States
HybridFull Time
Siteline
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.
TypeScript, React, MaterialUI, GraphQL, Apollo, Postgres
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1w
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Senior Software Engineer (Frontend) - Scribd Core
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/yr HybridFull Time
Scribd
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.
JavaScript, TypeScript, React, Next.js, Microfrontend, monorepos
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3mo
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Senior Front-End Engineer
San Francisco, California, United States
$230k-$280k/yr OnsiteFull Time, Internship
Mochi Health
Mochi Health: Provides telehealth weight management and prescription medication services.
5+ YOE5-7+ years frontend React experience; strong React/Next.js; complex healthcare UI; collaborate with mobile teams; onsite in San Francisco.
TypeScript, React, Next.js, Tailwind CSS, React Native, Expo, Redux, SQL, Redis, New Relic, Kubernetes, CSS, AWS, Cypress, Docker, Express
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1mo
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Senior Frontend Engineer - Design Systems
San Francisco or New York City or Portland or Canada or United States
$167k-$208k/yr RemoteFull Time
Mercury
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.
React, TypeScript, CI/CD
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2w
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Senior/Staff Frontend Engineer
San Francisco, California, United States
$100k-$200k/yr RemoteFull Time
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.
React, TypeScript, CI/CD
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1w
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Member of Technical Staff, Frontend Engineer
San Francisco, California, United States
$175k-$240k/yr OnsiteFull Time
Edison Scientific
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.
JavaScript, Reactjs, TypeScript, WebSockets, GraphQL, D3.js, Deck.gl, Three.js
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2w
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Senior Frontend Platform Engineer
North America or San Francisco or Los Angeles or New York City or Washington or London or Singapore
$210k-$230k/yr RemoteFull Time
TRM Labs
TRM Labs: Provides AI-powered intelligence and visualization platforms that help organizations investigate and disrupt illicit activity.
Strong JavaScript/TypeScript, React, experience building data-dense visualization platforms with Canvas/WebGL and graph visualization libraries; performance optimization and platform/SDK design experience required.
JavaScript, TypeScript, React, Canvas, WebGL, GPU, Web Workers, D3, PixiJS, Three.js, D3-force, Cytoscape.js, vis.js, Sigma.js
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4w
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Senior Frontend Engineer - Editing Accessibility (RELOCATE to Sydney)
Sydney or San Francisco or Surry Hills
HybridFull Time
Canva
Canva: Cloud-based visual communication and graphic design software platform.
Commercial experience building accessible web applications; strong TypeScript and React proficiency; WCAG knowledge; hands-on VoiceOver, NVDA, and JAWS experience; ability to work in large frontend codebases.
TypeScript, React, VoiceOver, NVDA, JAWS, WAI-ARIA, React Native, HTML5 canvas
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