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702 full stack engineer jobs at 426 companies in Fairfield, CA

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Founding Full-stack / Product Engineer
Cupertino, CA, US
$130k-$300k/yr On-SiteFull Time
HiringCafe
HiringCafe: Building a 100× better job search engine to take on Indeed and LinkedIn.
Help us build a 100× better job search engine. We need a full-stack engineer with great taste, sharp fundamentals, and a track record of shipping polished product on React/Next.js plus a real backend (Firebase, Elasticsearch, Redis, Stripe).
React, Next.js, TypeScript, Firebase, Elasticsearch, Redis, Stripe
Help us #BeatIndeed & #BeatLinkedIn
3mo
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Full-stack Engineer
San Francisco or United States
$100k-$250k/yr OnsiteFull Time
Hercules
Hercules: AI-powered platform for building applications and websites.
Senior or staff level full-stack software engineer; strong TypeScript/React; SaaS; API design; monorepos; scalable hosting; AI integration.
TypeScript, React, Postgres, Redis, Temporal, Docker, AWS, Cloudflare, Clickhouse, Otel, Hono, Drizzle ORM, Terraform, CDK
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2w
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Senior Full-Stack Engineer
San Francisco or New York City or Portland or United States or Canada
$167k-$208k/yr HybridFull Time
Mercury
Mercury: Banking services and financial software designed for startup companies.
3+ YOE3–7 years full-stack experience; knowledge of or willingness to learn Haskell, React, TypeScript, and Redux; product ownership mindset; effective communication; comfortable using AI tools to augment development.
Haskell, React, TypeScript, Redux
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1mo
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Full Stack Engineer, Guardian Monitoring
Oakland, California, United States
$146k-$235k/yr RemoteFull Time
LaunchDarkly
LaunchDarkly: Provides a feature management platform for software development teams.
5+ YOE5+ years in software engineering; full stack TS/React frontend and Go backend; strong product sense; collaborative; monitoring/observability experience a plus; feature flagging/release automation a plus
TypeScript, React, Go, Monitoring/Observability, Feature Flagging, Release Automation
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1mo
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Sr. Full Stack Agent Engineer
San Francisco, California, United States
$150k-$180k/yr HybridFull Time
Hotdata
Hotdata: Building agent-native data infrastructure for AI applications.
5+ YOE5-7 years of full-stack software engineering with React frontend, Python backend; AI stack with LlamaIndex or LangChain; cloud AWS/GCP; strong system design, data modeling, security; startup/zero-to-one mindset.
React, Python, Rust, Kubernetes, LlamaIndex, LangChain, AWS, GCP, DataFusion, Arrow
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2w
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Full-Stack Engineer, Agent Management Platform
San Francisco, California, United States
HybridFull Time
CrewAI
CrewAI: Platform for orchestrating collaborative multi-agent AI systems.
Strong full-stack product engineering experience with React and TypeScript frontend skills, Ruby/Rails backend or comparable MVC framework, PostgreSQL, background jobs, testing, and familiarity with AI/LLM agent concepts.
React, TypeScript, Ruby/Rails, PostgreSQL, Vite, Tailwind, Hotwire, Stimulus, WorkOS, Auth0, Okta, Keycloak, Entra, GitHub, Slack, HubSpot, Salesforce, Stripe, Minitest, RSpec, Vitest, ViewComponent, React Query
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1mo
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Full-Stack Engineer (Boston)
Boston or Cambridge or San Francisco
$150k-$225k/yr HybridFull Time
General Medicine
General Medicine: An online store for upfront-priced medical care and consultations.
2+ YOE2+ years building web apps as a full-stack engineer; proficiency with modern infra and stacks (AWS, Ruby on Rails, NextJS); SQL experience; strong communication, critical thinking, and product/QA ownership.
AWS, Ruby on Rails, NextJS, SQL, EHRs, LLMs
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3mo
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Full Stack Engineer
San Francisco, California, United States
OnsiteFull Time
Phonely
Phonely: AI-powered voice platform for automated customer phone interactions.
5+ YOE5+ years building production web apps; strong React/Next.js; full-stack API design; TypeScript; cloud/CI/CD; collaboration.
React, Next.js, TypeScript, Python, AWS, GCP, Kubernetes, Redis, Datadog, Firebase, Supabase, SIP
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2mo
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Engineer, Full Stack
San Mateo, California, United States
OnsiteFull Time
Bedrock Data
Bedrock Data: AI-native data security and governance platform for enterprise environments.
2+ YOE5? years of full stack experience preferred; strong React, TypeScript, Node; GraphQL API design; familiarity with CI/CD; ability to define frontend direction and architecture.
React, Typescript, Node, GraphQL, CI/CD
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1w
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Full-Stack Engineer
San Francisco, California, United States
$140k-$220k/yr OnsiteFull Time
Max AI
Max AI: Autonomous AI agents for healthcare billing and revenue management.
6+ YOE6+ years full-stack experience; expertise with front-end frameworks (React), strong back-end and database knowledge, and proven ability to build and deploy production-grade software at scale.
TypeScript, Nestjs, Python, Django, Nextjs, React, Shadcn, Jotai, Postgres, Redis, Clickhouse, Kubernetes, AWS, Pulumi, ArgoCD, Kafka, tRPC, REST
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3w
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Staff Full Stack Engineer
San Francisco, California, United States
$200k-$250k/yr OnsiteFull Time
David AI
David AI: Providing proprietary audio datasets for training advanced AI models.
6+ YOE6+ years full-stack product engineering, strong web fundamentals, experience building scalable systems, technical leadership or mentoring, familiarity with ML/LLM or DSP is a plus.
Next.js, TypeScript, TailwindCSS, Node.js, tRPC, PostgreSQL, AWS, Trigger.dev, WebRTC, FFmpeg
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1mo
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Founding Engineer (Full Stack)
San Francisco, California, United States
HybridFull Time
Clera
Clera: AI talent agent matching professionals with high-growth startup roles
Experience shipping production systems, debugging production incidents, hands-on LLM systems experience, full-stack development across UI, infrastructure, and integrations, and strong ownership and engineering judgment.
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3mo
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Senior/Staff Software Engineer (Full-Stack Engineer)
San Francisco or New York City
$120k-$180k/yr OnsiteFull Time
Actively AI
Actively AI: AI agents for automated enterprise revenue and sales operations.
5+ YOE5+ years shipping customer-facing full-stack products; strong React/TypeScript frontend; Python/FastAPI backend; architectural and product-minded; experience with AI-powered products.
Python, FastAPI, React, TypeScript, SQL, NoSQL, Caching, APIs
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2mo
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AI Full Stack Engineer
San Francisco, California, United States
HybridFull Time
Infinitus
Infinitus: Automating healthcare administrative phone calls with AI voice agents.
8+ YOE8+ years full-stack engineering; track record leading design/delivery of complex products; strong frontend/backend, AI-enabled product experience; startup-style speed and ownership.
React, TypeScript, Python, Go, Java, C++, AWS, GCP, SQL, NoSQL
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3mo
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Full Stack Engineer
San Francisco, California, United States
$160k-$230k/yr HybridFull Time
CodeRabbit
CodeRabbit: AI-powered platform for automated code reviews and pull requests.
3+ YOE3-6 years full stack production experience; strong React/TypeScript frontend; Node.js backend; cloud, CI/CD, observability; AI Dev tool fluency; strong collaboration with ML/infra teams
React, TypeScript, Node.js, AWS, GCP, CI/CD, observability, Cursor, Claude Code, Codex
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1mo
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Full Stack Engineer
San Francisco, California, United States
OnsiteFull Time
Macroscope
Macroscope: Provides AI-powered codebase analysis and automated code reviews.
4+ YOE4+ years full-stack development; HTML/CSS, TypeScript, React; Go and Postgres; scalable web app architecture; end-to-end frontend features; AI/LLM experience; proactive, high-agency contributor.
TypeScript, React, Go, Postgres, Temporal, GCP, Terraform, AST, JavaScript, HTML/CSS, AI/LLM tools
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1mo
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Full Stack Engineer
San Mateo, California, United States
HybridFull Time
Sol
Sol: AI-native HRIS platform for modern workforce management.
Deep backend experience in Kotlin/Java and JVM services/APIs, TypeScript frontend experience, familiarity with concurrency and data access patterns, and daily use of AI coding tools; ability to ship full-stack features.
Kotlin, Java, JVM, TypeScript
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2w
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Full Stack Engineer
San Francisco, California, United States
RemoteFull Time
Wheelhouse: Dynamic pricing and revenue management software for rental properties.
4+ YOE4+ years full-stack experience with deep front-end skills; expert in React, Next.js, TypeScript, Tailwind; backend familiarity (Ruby on Rails, Postgres) preferred; data visualization experience and strong product/UX sense; remote-first work style.
JavaScript, React, Next.js, TypeScript, Tailwind, Ruby on Rails, Postgres, Highcharts, D3.js, Recharts, Figma
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1mo
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Senior Full Stack Engineer
San Francisco, California, United States
$175k-$250k/yr OnsiteFull Time
Rely Health
Rely Health: AI-powered platform for automated healthcare patient care navigation.
5+ YOESenior level full-stack engineer with 5+ years across frontend and backend; production experience with Claude Code/Anthropic API; LLM integration; HIPAA/regulatory awareness; startup mindset and ability to work across product areas.
Claude Code, Anthropic API, LLM, React, Node.js, Python, APIs, Data pipelines
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2mo
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Senior Full Stack Engineer
San Francisco, California, United States
HybridFull Time
Beast Industries
Beast Industries: Produces digital media and consumer goods for MrBeast brands.
Senior full stack engineer with consumer-scale experience; AI-native approach; proven shipping track record; scrappy with startup and big-tech exposure.
React, Node.js, APIs, AI tooling
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2w
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Senior Full-Stack Engineer
San Francisco, California, United States
$220k-$260k/yr OnsiteFull Time
Amigo
Amigo: AI infrastructure for building and training clinical healthcare agents.
Proven production full-stack experience owning features end-to-end, strong correctness and reliability focus for sensitive data, product instincts, ability to work on site in San Francisco.
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