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61 fullstack engineer jobs at 46 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
1w
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Senior Fullstack Engineer
San Francisco or Chicago
HybridFull Time
Plenful
Plenful: Automates administrative and operational workflows for healthcare organizations.
7+ YOE7+ years building customer-facing fullstack products; proficiency in JavaScript/TypeScript and working proficiency in Python; production-ready judgment in regulated healthcare; strong communication.
JavaScript, TypeScript, Python, Java, Ruby
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2w
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Senior Fullstack Engineer, Postman Insights
San Francisco or Boston or Austin or New York City or Tokyo or London or Bangalore
OnsiteFull Time
Postman
Postman: Platform for building, testing, and managing software APIs.
Senior fullstack engineer with strong track record launching user-facing frontend and backend features, architecture experience, driving large projects, fast startup experience, product focus, AI familiarity, and ability to work from San Francisco office 5 days/week.
Postman Insights, Postman
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3mo
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Software Engineer, Fullstack
Chicago or San Mateo or Louisville
$125k-$160k/yr OnsiteFull Time
Treehouse
Treehouse: Installs residential EV chargers and home battery backup systems.
2+ YOEBachelor's in Computer Science or equivalent experience; 2+ years frontend and server-side experience; strong JavaScript and modern framework experience; cloud and SQL knowledge preferred.
JavaScript, Node.js, Java, Python, Scala, C#, C++, Go, React, Angular, VueJs, Ember, AWS, Azure, GCP, Docker, Kubernetes, SQL
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2mo
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Fullstack Software Engineer
San Francisco, California, United States
$170k-$200k/yr HybridFull Time
Collective
Collective: All-in-one financial platform for self-employed entrepreneurs.
3+ YOE3–4 years of production software experience; strong fullstack skills (Python, Django, React); experience with external APIs and real-world data; hands-on AI developer tools; ability to ship end-to-end features with instrumentation; SQL and data warehousing (BigQuery a plus).
Python, Django, React, SQL, BigQuery, APIs
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6d
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Fullstack Engineer
San Francisco, California, United States
$145k-$240k/yr OnsiteFull Time
Circleback
Circleback: AI-powered platform for capturing and managing workplace meeting intelligence.
Build and ship end-to-end across web, desktop, and mobile; design systems; work on AI, search, transcription, and performance; strong product sense and mentoring experience.
React, Next.js, Electron, Swift, React Native
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1mo
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Staff Fullstack Engineer
New York City or San Francisco
HybridFull Time
Dispatch
Dispatch: Syncing client data across financial advisor software tools.
10+ YOE10+ years engineering experience; deep Node and React proficiency; track record architecting and shipping high-scale production systems; experience setting technical direction across teams; startup experience preferred.
React, Node, Fastify, MUI, React Query, Vite, Storybook, Playwright, Go, Postgres, gRPC, Protobuf, Redis, AWS, Terraform, GitHub Actions
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1mo
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Fullstack Software Engineer, Applied AI
San Francisco, California, United States
$130k-$500k/yr OnsiteFull Time
Mercor
Mercor: Connecting expert human intelligence with frontier AI model development.
5+ YOE5+ years fullstack experience; JS/TS (React/Next.js); Python/Node.js backend; data pipelines; strong UX; able to own frontend and backend.
React, Next.js, Python, Node.js, REST, Relational databases
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2mo
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Founding Fullstack Engineer
San Francisco, California, United States
$120k-$170k/yr OnsiteFull Time
MathGPT
MathGPT: Personal AI tutor for every STEM student.
Experience building and shipping modern web apps end-to-end (React/Typescript); strong product sense; polished UI; strong communication; simplifies code.
React, Typescript, React Native, Expo
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1w
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Senior Fullstack Engineer
San Francisco, California, United States
$230k-$280k/yr OnsiteFull Time
Mochi Health
Mochi Health: Provides telehealth weight management and prescription medication services.
5+ YOE5+ years full-stack experience, production systems experience, strong frontend state management, data modeling, ownership of lifecycle, experience with Kubernetes/Terraform/AWS, mentoring skills, and familiarity using frontier AI tools.
Kubernetes, Terraform, AWS, React, CI/CD, Codex 5.3, Claude Opus 4.6
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1mo
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Fullstack Software Engineer, AI Agents (Copy)
San Francisco, California, United States
$150k-$250k/yr OnsiteFull Time
11x
11x: Builds autonomous AI agents for sales and revenue teams.
3+ YOE3+ years as software/product engineer; strong fullstack with TypeScript, React, Next.js, Node.js; ownership of products from concept to launch; high agency; strong product intuition; able to work in ambiguity; bias toward building and prototyping; strong cross-functional communication; interest in AI-native workflows.
TypeScript, React, Next.js, Node.js, Cursor, Claude, Windsurf, v0
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4w
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Senior Fullstack Engineer - Growth + Onboarding
New York City or San Francisco or Los Angeles
$180k-$210k/yr HybridFull Time
Pivotal Health
Pivotal Health: AI platform automating healthcare insurance claim disputes for providers.
6+ YOE2+ Mgmt6+ years software engineering experience with recent backend work, 2+ years managing engineers, experience with integrations and third-party APIs, customer-facing communication, Python familiarity, and Bachelor's in STEM preferred.
EDI, 835/837, HL7, FHIR, ICD-10, CPT, Epic, Cerner, SFTP, Python
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1mo
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Fullstack Developer (US)
New Jersey or New York City or San Francisco
OnsiteFull Time
Lynx Analytics
Lynx Analytics: Provides graph-based AI and big data analytics solutions for enterprises.
5+ YOEBachelor's in CS, 5+ years full-stack development across front- and back-end, experience with React/Next.js and Python, cloud-native experience, overlap 3 hours/day with Pacific Time, strong communication.
React, Next.js, Jest, React Testing Library, Python, AWS, Azure, GCP, Docker, Kubernetes, CI/CD
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3mo
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Fullstack Engineer, Customer Success
Palo Alto or San Francisco
$130k-$220k/yr HybridFull Time
Pylon
Pylon: API-first infrastructure for automated mortgage lending and operations.
Experience building for web apps; strong TypeScript/React/NestJS; ownership of features from design to deployment; customer-focused problem solving.
TypeScript, React, NestJS, GraphQL, SQL, PostgreSQL, Temporal.io
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1mo
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Fullstack Engineer, Creator Home
New York or San Francisco
$189k-$256k/yr HybridFull Time
Patreon
Patreon: Membership platform for creators to monetize work and engage fans.
2+ YOE2–3+ years in software development; Python experience; backend systems; product-minded; ability to explain trade-offs.
Python, React, TypeScript, APIs
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1mo
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Fullstack Design Engineer
San Francisco, California, United States
$140k-$180k/yr OnsiteFull Time
Blaxel
Blaxel: Cloud infrastructure purpose-built for autonomous AI agents.
Design and ship end-to-end product experiences; strong design craft, front-end fundamentals (TypeScript, React, CSS), AI fluency, analytics-driven iteration, and building design systems.
TypeScript, React, CSS, Figma
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1mo
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Fullstack Software Engineer, Notifications Lifecycle
San Francisco, California, United States
$164k-$229k/yr RemoteFull Time
Reddit
RedditNYSE: RDDT: Social platform for community-driven discussion and content sharing.
3+ YOE3+ years software engineering; full stack experience; frontend in Typescript, backend in GraphQL, Go, or Python; strong testing and reliability.
Go, Python, Typescript, GQL, Spark, Kafka, Airflow, BigQuery, Redis, Cassandra, PostgreSQL, Kubernetes, Docker
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1mo
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Senior Fullstack Engineer, Growth & Monetization
New York City or San Francisco or Boston
$175k-$240k/yr OnsiteFull Time
LangChain
LangChain: Tools for building and deploying production-ready AI agents.
Extensive full-stack experience with React, TypeScript, and Go and/or Python; familiarity with Postgres, Redis, REST APIs, usage metering, subscriptions, and monetization systems; strong product intuition and analytics-driven mindset.
LangSmith, LangChain, LangGraph, Deep Agents, LangSmith Engine, React, TypeScript, Python, Go, REST APIs, Postgres, Redis
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1w
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Member of Technical Staff, Fullstack
San Francisco, California, United States
$205k-$225k/yr OnsiteFull Time
Envoy
Envoy: Unified workplace management platform for hybrid office operations.
7+ YOEBS/MS in CS or related field,7+ years building production fullstack software with React and TypeScript plus backend experience (Java/Kotlin/Ruby),Postgres,Git,CI/CD,API design,product-focused mindset.
React, JavaScript, TypeScript, HTML, CSS, Postgres, Git, GitHub, CI/CD, RESTful APIs, GraphQL, Java, Kotlin, Ruby on Rails, LenelS2, Brivo, Genetec, Honeywell, Cisco Meraki, Okta, Microsoft Azure, Microsoft Teams, Slack, ServiceNow, DocuSign, Avigilon Alta, Descartes Visual Compliance
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2mo
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Fullstack Staff Software Engineer
Foster City, California, United States
$146k-$234k/yr HybridFull Time
Visa
VisaNYSE: V: Global payment technology facilitating electronic funds transfers.
5+ YOE5+ years software engineering experience with a Bachelor's degree or 2+ years with an advanced degree; web/mobile apps; leadership experience; experience with web services; debugging and testing; cross-functional collaboration.
Java, C++, C#, Angular, React, Kubernetes, Docker
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1mo
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Staff Software Engineer - Fullstack
San Francisco or New York City or London or Sydney
$240k-$270k/yr OnsiteFull Time
Sigma Computing
Sigma Computing: Cloud-native analytics platform featuring a spreadsheet-style interface.
10+ YOE10+ years building and deploying high-quality web software; strong CS fundamentals; experience with Rust, Go, GraphQL, and TypeScript; continuous deployment and distributed systems experience preferred.
Rust, Go, GraphQL, TypeScript, SQL, Python
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