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208 senior frontend developer jobs at 142 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 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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1mo
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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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1mo
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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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2mo
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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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1mo
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Senior Frontend Engineer
San Francisco or California
$175k-$225k/yr HybridFull Time
Weave Bio
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.
React, TypeScript, Cursor, Claude, Slate, ProseMirror, Yjs, Liveblocks, CRDTs
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1w
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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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1mo
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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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3w
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Senior Frontend Engineer, Growth & Agents
San Francisco, California, United States
$185k-$250k/yr HybridFull Time
EvenUp
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.
React, TypeScript
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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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1mo
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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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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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15h
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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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4w
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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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1w
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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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5d
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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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2mo
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Frontend Engineer - Cluster OS Platform
San Francisco, California, United States
OnsiteFull Time
Clera
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.
Next.js, React, Tailwind, shadcn/ui, Convex, Kubernetes, CRDs, etcd, gRPC, cRPC, Terraform, Helm, ArgoCD, GitOps, Prometheus, Grafana, Go, PostHog, AWS, GCP, Azure
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1mo
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Staff Engineer, Frontend Applications
South San Francisco, California, United States
$150k-$200k/yr OnsiteFull Time
Aechelon Technology
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++
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3w
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Senior Software Engineer-Frontend
Fremont, California, United States
$140k-$170k/yr HybridFull Time
Scout Motors
Scout Motors: Designs and manufactures all-electric rugged SUVs and trucks.
5+ YOEBachelors in CS or related,5+ years front-end development,proficient in JavaScript/TypeScript and a major front-end framework,HTML/CSS,API integration,testing,and accessibility (WCAG).
JavaScript, TypeScript, React, Angular, Vue, HTML, CSS, REST, GRPC, GraphQL
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1w
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Senior Software Engineer, Frontend (Agentic AI)
San Francisco or Marina Del Rey
$180k-$230k/yr HybridFull Time
Sift
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.
React, NextJS, TypeScript, Redux, Tailwind, Radix UI, WebAssembly, D3.js, WebGL, Apache ECharts, Web Workers, OPFS, Go, Parquet, Flink, Kafka, Redpanda, Beam, DuckDB, Timescale, QuestDB, InfluxDB, Druid, GitHub Actions, AWS, Azure, GCP, Docker, Kubernetes, Terraform
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