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95 fullstack software engineer jobs at 72 companies in California

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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
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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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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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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1w
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Senior Fullstack Software Engineer
Palo Alto, California, United States
$146k-$201k/yr HybridFull Time
Pebl
Pebl: Platform for hiring, paying, and managing global employees.
8+ YOE8+ years software engineering experience, strong frontend/UX focus with React and TypeScript, experience with invoicing or financial systems or complex forms, API and backend integration skills, familiarity with AWS, PostgresQL, and Kubernetes.
React, TypeScript, AWS, PostgresQL, Kubernetes
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2mo
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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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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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2mo
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Fullstack Software Engineer
Redwood City, California, United States
OnsiteFull Time
Integrated Biosciences
Integrated Biosciences: Advancing small molecule therapeutics for age-related diseases.
Bachelor’s or master’s in CS; experience building full stack systems; cloud provisioning and deployment; AI tool fluency; interest in drug discovery.
PostgreSQL, Typescript, React, Docker, AWS, Vercel, ROS2, Codex, Claude Code, Opencode, Grok
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2mo
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AI Software Engineer (Fullstack)
Walnut Creek, California, United States
HybridFull Time
Clearstory
Clearstory: SaaS platform for managing construction project change orders.
2+ YOE2-3+ years software engineering; Python/TypeScript; fullstack React/Postgres; LLM tooling; cloud; Docker; CI/CD; strong communication.
Python, TypeScript, React, Postgres, Docker, CI/CD, GCP
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1w
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Fullstack Senior Software Engineer, ArsenalOS
Costa Mesa, California, United States
$166k-$220k/yr OnsiteFull Time
Anduril Industries
Anduril Industries: Defense technology building autonomous military hardware and software.
5+ YOE5+ years software engineering experience, deep full‑stack web expertise (backend/frontend/integration), degree in CS/IS/EE or related, experience with high‑availability enterprise applications, U.S. Person required.
Javascript, React, Typescript, NextJS, ERP, MES, WMS, CRM
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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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Software Engineer, Frontend/Fullstack
San Mateo, California, United States
$150k-$300k/yr OnsiteFull Time
WisdomAI
WisdomAI: AI-powered conversational analytics platform for enterprise data teams.
Frontend/Fullstack engineer with strong React, TypeScript, and Node experience; product instinct and polish; Bachelor's in Computer Science or equivalent; mid-to-senior level experience preferred.
React, TypeScript, Node, Cursor, Claude Code, Codex, Figma, Slack
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2w
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Fullstack Software Engineer, Global Payments
San Jose, California, United States
OnsiteFull Time
ByteDance
ByteDance: Developing AI-driven content platforms and mobile applications.
3+ YOE3+ years frontend engineering experience; degree in computer science or related; proficiency with JavaScript/Node.js/HTML/CSS, modern frameworks and bundlers; strong problem-solving and product ownership.
JavaScript, Node.js, HTML, CSS, React, Vue, Angular, Webpack, Rollup, Babel, AST, Gulp
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2mo
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Senior Fullstack Software Engineer
San Diego, California, United States
RemoteFull Time
CourtAvenue
CourtAvenue: Digital transformation agency providing strategy and experience design.
7+ YOE7+ years of industry experience; full-stack development; strong communication; SaaS/cloud experience; client-facing skills; leadership in delivery.
NodeJS, JavaScript, SQL, C#, Java, Swift, Kotlin, RabbitMQ, MongoDB, ExpressJS, React, Vue, Webpack, AWS, Azure, Google Cloud, Docker, Container, Terraform, Ansible
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2mo
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Senior Fullstack Software Engineer
San Francisco or Bangalore or Boston or Austin or Tokyo or London
OnsiteFull Time
Postman
Postman: Platform for building, testing, and managing software APIs.
8+ YOE8+ years experience building frontend or full-stack apps; strong JS/HTML/CSS; React or Next.js; data-driven decisions; ownership; collaboration; developer-focused mindset.
JavaScript, HTML, CSS, React, Next.js, MobX
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1w
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Senior Fullstack Engineer - Growth
Los Gatos or Birmingham
RemoteFull Time
Overflow
Overflow: Philanthropy platform for stock, crypto, and cash donations.
5+ YOE5+ years fullstack engineering experience; strong React, TypeScript, Node.js; experience building RESTful APIs and relational schema; product-led growth mindset; mentorship and on-call participation.
React, TypeScript, Node.js, RESTful API
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2w
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Senior Fullstack Engineer
San Francisco, California, United States
$170k-$250k/yr OnsiteFull Time
Circleback
Circleback: AI-powered platform for capturing and managing workplace meeting intelligence.
3+ YOE3+ years building and shipping full‑stack software; experience with React/Next.js, Electron, Swift, React Native; AI and product-oriented engineering judgment.
React, Next.js, Electron, Swift, React Native
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3mo
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Staff Software Engineer, Fullstack
San Francisco, California, United States
$325k-$485k/yr OnsiteFull Time
Ivo
Ivo: AI-powered contract review and intelligence platform for legal teams.
Full-time, on-site staff software engineer building full-stack generative AI products; startup experience preferred.
Full‑stack development, Generative AI tooling, LLM orchestration, Data extraction, Clustering, UI and backend systems
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2mo
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Fullstack Software Development Engineer 4
San Jose, California, United States
$139k-$258k/yr OnsiteFull Time
Adobe
AdobeNASDAQ: ADBE: Provides software for digital media creation and marketing analytics
5+ YOEBachelor’s degree in Computer Science; 5+ years web apps experience; JS/TS; CSS; HTML; React/Vue/Lit; REST APIs; microservices; Agile; accessible and localized UI.
JavaScript, TypeScript, CSS, HTML, React, Lit, Vue.js, REST APIs, Jenkins, GitHub
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3mo
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Staff Software Engineer - Fullstack
Los Angeles or Adrian
HybridFull Time
Observable Space
Observable Space: Developing integrated hardware and software for persistent space observation.
8+ YOE8+ years in software engineering; 2–3 years in staff/principal/lead roles; strong in Java/Kotlin/C++/C#; data modeling with RDBMS/ETL; TDD; experience in distributed systems and reactive frontend; ability to lead and influence engineering standards.
Java, Kotlin, C++, C#, TypeScript, React, SQL, ETL, Kotlin (backend), JVM
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2w
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Software Engineer, Fullstack
San Francisco, California, United States
$200k-$320k/yr OnsiteFull Time
Swarm Aero
Swarm Aero: A building swarming unmanned aircraft and command-and-control software to enable large-scale autonomous operations.
6+ YOEDegree in CS or equivalent, 6+ years building complex full-stack applications, strong UI/UX instincts, React experience, performance-sensitive and real-time systems experience, familiarity with WebGL/OpenGL and C++ preferred.
React, WebGL, OpenGL, C++, CI/CD
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