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75 senior fullstack developer jobs at 55 companies in California

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Senior Fullstack Engineer - Growth
Los Gatos or Birmingham
RemoteFull Time
The Overflow
The Overflow: Private fintech SaaS platform helping churches, nonprofits, and mission-driven organizations process cash and non-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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Senior Fullstack Engineer
Menlo Park, California, United States
$200k-$288k/yr OnsiteFull Time
Snowflake
SnowflakeNYSE: SNOW: Cloud-based data platform for AI, analytics, and data applications.
Senior-level full-stack engineering experience building customer-facing products and scalable systems; proficient with JavaScript (React), Go, and Java; strong product sense, communication, and mentoring ability.
JavaScript, React, Go, Java
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3w
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Senior Fullstack Engineer
Da Nang or San Francisco or United States or Vietnam or Europe
OnsiteFull Time
Flodesk
Flodesk: Private email marketing and commerce SaaS platform for small businesses, creators, solopreneurs, and coaches.
Strong frontend or backend engineering skills; TypeScript, React, modern build tools, SOA, Golang or Node.js, databases, AWS, scalable systems, AI-assisted development, product thinking, ownership, and collaboration.
TypeScript, React, Vite, Turbo, Golang, Node.js, MongoDB, PostgreSQL, AWS, Claude Code, Cursor, Codex, Figma, Shopify, Zapier, WooCommerce, MacBook Pro
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1w
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Fullstack Engineer, App Platform
San Francisco or Seattle or New York City or Los Angeles or United Kingdom or Ireland or Poland or Germany or Australia
$207k-$230k/yr HybridFull Time
Whatnot
Whatnot: Live shopping marketplace connecting buyers and sellers.
5+ YOERequires 5+ years of software development experience, a bachelor's degree or equivalent experience, React and GraphQL web development, scalable fullstack systems expertise, and strong product, ownership, mentoring, and problem-solving skills.
React, GraphQL, Next.js, Node, Python, Postgres
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4w
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Senior Fullstack Engineer
Los Angeles, California, United States
$170k/yr OnsiteFull Time
Flight Group
Flight Group: Creator-economy holding that builds media, technology, community, and venture businesses for creators.
Full-stack experience with TypeScript, React, Node.js, Python, JavaScript, cloud infrastructure, databases, APIs, scalable systems, and production AI/ML or LLM applications.
TypeScript, React, Node.js, Python, JavaScript, Google Cloud, SQL, NoSQL, APIs, AI/ML, LLMs
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1mo
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Senior Fullstack Engineer
Palo Alto or San Francisco
$170k-$210k/yr HybridFull Time
Midi Health
Midi Health: Insurance-covered virtual healthcare clinic providing telehealth care for women navigating menopause and midlife health.
6+ YOE6+ years building production full‑stack web applications; strong system design; hands‑on experience with Django/DRF and React/Next.js or equivalent; fluent with AI coding tools; excellent communication and mentorship.
Claude Code, Cursor, Copilot, Django, DRF, React, Next.js
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Senior Fullstack Engineer
San Francisco, California, United States
$230k-$280k/yr OnsiteFull Time
Mochi Health
Mochi Health: Private telehealth serving patients with personalized virtual clinical care, weight management, and treatments across 120+ conditions.
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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Senior Fullstack Software Engineer
Westford or Austin or Santa Clara
$184k-$357k/yr HybridFull Time
NVIDIA
NVIDIANASDAQ: NVDA: Computing platform for AI and accelerated graphics.
6+ YOEExpertise in Golang, TypeScript/JavaScript, Unix/Linux, database concepts, algorithms; BS in Computer Science or equivalent; 6+ years software development experience.
Golang, Unix/Linux, typescri pt, javascript, Docker, K8S, Ruby, C++
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Senior Fullstack Software Engineer
Westford or Austin or Santa Clara
$184k-$357k/yr HybridFull Time
NVIDIA
NVIDIANASDAQ: NVDA: Computing platform for AI and accelerated graphics.
6+ YOEBachelor's degree in Computer Science or equivalent experience, 6+ years of software development experience, and strong Golang, Unix/Linux, TypeScript, JavaScript, database, algorithms, and computer architecture skills.
Golang, Unix/Linux, TypeScript, JavaScript, Docker, K8S, Ruby, C++
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1mo
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Senior Fullstack Software Engineer
Westford or Austin or Santa Clara
$184k-$357k/yr HybridFull Time
NVIDIA
NVIDIANASDAQ: NVDA: Computing platform for AI and accelerated graphics.
6+ YOE6+ years software development; strong Golang and Unix/Linux experience; proven TypeScript and JavaScript web skills; database and algorithms knowledge; BS in CS or equivalent; adaptable to global teams.
Golang, Unix/Linux, TypeScript, JavaScript, Docker, K8S, Ruby, C++
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1mo
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Senior Fullstack Engineer
San Francisco, California, United States
$170k-$250k/yr OnsiteFull Time
Circleback
Circleback: AI-powered meeting notes and automations
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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2mo
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Fullstack Developer (US)
New Jersey or New York City or San Francisco
OnsiteFull Time
Lynx Analytics
Lynx Analytics: AI-native consulting firm helping global life sciences organizations make commercial and clinical decisions with data and AI.
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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1mo
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Senior Fullstack Product Engineer (Go)
London or New York City or San Francisco or Palma or Casablanca
OnsiteFull Time
Nuitée
Nuitée: Irish travel-technology platform providing hotel-distribution APIs and booking infrastructure for airlines, banks, OTAs, and travel companies.
Experienced Go backend and modern frontend (Next.js/Vue.js) developer with product focus, UX judgement, and ability to own features end-to-end.
Golang, Next.js, Vue.js
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2mo
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Senior Fullstack Engineer - Growth + Onboarding
New York City or San Francisco or Los Angeles
$180k-$210k/yr HybridFull Time
Radix Health
Radix Health: AI-powered software for healthcare providers to achieve fair out-of-network reimbursement and manage claims.
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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2mo
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Senior Fullstack Engineer, Growth & Monetization
New York City or San Francisco or Boston
$175k-$240k/yr OnsiteFull Time
LangChain
LangChain: Private AI software providing agent-engineering platforms and open-source frameworks for developers and enterprises.
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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3mo
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Sr. Fullstack Platform Engineer - (Backend Focus)
Los Angeles or California or United States
$140k-$180k/yr RemoteFull Time
Salt AI
Salt AI: Software providing governed, auditable AI workflows for regulated life sciences, financial, energy, and government organizations.
Senior backend/platform engineer with deep Python/Django, APIs, cloud infrastructure, Kubernetes, distributed systems, workflow execution, observability, and fullstack familiarity (TypeScript/React). High product judgment and experience using AI engineering tools.
Python, Django, TypeScript, React, Kubernetes, Claude Code, Cursor, Codex, GitHub
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2w
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Senior Fullstack Software Engineer
Irvine, California, United States
$170k-$200k/yr OnsiteFull Time
TP-Link Systems Inc.
TP-Link Systems Inc.: Private U.S.-based networking-equipment and smart-home-device maker serving consumers, businesses, and service providers globally.
7+ YOEBachelor's degree or equivalent experience, 7+ years in software engineering, JavaScript framework expertise, PHP with Go or Java, cloud platforms, web applications, APIs, and technical mentoring experience.
PHP, JavaScript, React, Vue, Angular, Go, Java, Figma, Adobe Photoshop, AWS, Azure, Google Cloud Platform, Google Analytics, Adobe Creative Cloud, Docker, Kubernetes, CI/CD, Large Language Model (LLM), Retrieval-Augmented Generation (RAG)
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2mo
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Fullstack Senior Software Engineer
Foster City, California, United States
HybridFull Time
Visa
VisaNYSE: V: Global leader in digital payments and transaction technology.
2+ YOEMaster's degree in a technical field or Bachelor's + 2 years, or 5 years related experience; expertise in one or more languages (Java, C#, C++, Python, PHP, JavaScript); experience building scalable services; familiarity with front-end (HTML, CSS, JavaScript) and modern tools (Angular, React, Kubernetes, Docker).
HTML, CSS, JavaScript, Java, C++, C#, Python, PHP, Angular, React, Kubernetes, Docker, APIs
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3mo
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Fullstack Software Engineer, Applied AI
San Francisco, California, United States
$130k-$500k/yr OnsiteFull Time
Mercor
Mercor: AI-powered talent marketplace connecting contractors with global organizations.
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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1mo
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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 developing AI-powered autonomous military systems.
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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