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929 senior react engineer jobs at 457 companies in San Mateo, CA

2mo
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Senior React Native Engineer
San Francisco or Los Angeles
$160k-$210k/yr OnsiteFull Time
Arena Club
Arena Club: Digital marketplace and vaulting service for sports collectibles
7+ YOEBachelor's in CS/Engineering, 7+ years mobile app development, proficiency in React Native and iOS/Android ecosystems, familiarity with Rx, IoC/DI, Bazel, A/B testing, analytics, CI and automated testing; experience leading mobile launches and using AI tools (Claude, Cursor).
React Native, iOS, Android, Rx, IoC/DI, Bazel, Claude, Cursor, A/B testing, analytics
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6d
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Senior React Native / Expo 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 frontend experience with deep React Native and Expo expertise, TypeScript, mobile infrastructure, HealthKit/Health Connect integrations, EAS, and strong product sense for healthcare apps.
React Native, Expo, TypeScript, Apple HealthKit, Google Health Connect, EAS (Expo Application Services), Config Plugins, Swift, Objective-C, Kotlin, Java, Sentry, Codex 5.3, Claude Opus 4.6
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1w
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Product Engineer (React)
San Francisco, California, United States
OnsiteFull Time
Rox
Rox: AI-powered revenue operating system with autonomous sales agents.
Expert-level React experience, frontend architecture and performance, production React apps, middle-tier/API orchestration, Next.js/TypeScript preferred, strong engineering fundamentals.
React, Next.js, TypeScript
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3mo
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Senior Software Engineer
San Francisco, California, United States
HybridFull Time
Scope
Scope: Building custom AI systems and agents for enterprise workflows.
6+ YOESenior software engineer with 6+ years of production experience across frontend and backend; proficient in Python, TypeScript, React/Next.js; Docker/Kubernetes on cloud; CI/CD; and LLM frameworks.
Python, TypeScript, React, Next.js, Docker, Kubernetes, Terraform, CI/CD, LangChain, LangGraph, Anthropic SDK, OpenAI SDK, MCP, GCP, AWS
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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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Senior Software Engineer, Mobile Platform (React Native)
San Francisco, California, United States
$205k-$235k/yr HybridFull Time
Front
Front: Customer operations platform for collaborative team communication.
Experience building fast, real-time mobile apps; React Native; C/C++; product minded; thrives in a fast-paced, collaborative, high-growth environment; pragmatic problem-solving; leadership.
React Native, C/C++, JNI, Android NDK, Kotlin, TypeScript
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Senior Staff Engineer
New York City or San Francisco
$208k-$350k/yr HybridFull Time
Braze
BrazeNASDAQ: BRZE: Platform for personalized customer engagement and cross-channel messaging.
10+ YOE10+ years software engineering, multi-team technical leadership, strong Ruby on Rails and frontend (TypeScript/React), built foundational infrastructure, architectural judgment, mentoring, reliability focus.
Ruby, Ruby on Rails, TypeScript, React, MongoDB, Event-driven architectures, Distributed Systems, API Design
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3mo
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Senior Security Engineer
Austin or Chicago or Dallas or Denver or Los Angeles or San Diego or San Francisco
$131k-$169k/yr HybridFull Time
Karbon
Karbon: Practice management software for accounting firms.
4+ YOESenior Security Engineer with 4+ years in security or development; strong communication; cloud and AI experience; hands-on with security tooling and threat modelling.
DotnetCSharp, JavaScript, React, EmberJS, Python, Azure, AWS, GCP, PowerShell, Bash, GitHub Copilot, Burp Suite
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2mo
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Senior Design Engineer - Top of Funnel
San Francisco or New York or Portland or Canada or United States
$167k-$208k/yr HybridFull Time
Mercury
Mercury: Banking services and financial software designed for startup companies.
Senior frontend engineer with design sensibility: expert HTML/CSS and web animation (GSAP, Web Animations API), proficient in React and Next.js, experience as technical lead, familiarity with headless CMS (DatoCMS), strong performance focus and portfolio required.
HTML, CSS, GSAP, Web Animations API, React, Next.js, DatoCMS
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3mo
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Senior Full Stack Software Engineer (Network)
San Jose, California, United States
$156k-$315k/yr HybridFull Time
Hewlett Packard Enterprise
Hewlett Packard EnterpriseNYSE: HPE: Provides edge-to-cloud IT infrastructure and platform services.
6+ YOESenior full stack engineer with React/Node.js, REST APIs, networking knowledge; 6+ years exp; hybrid San Jose, CA.
React, Redux, JavaScript, Node.js, REST APIs, Mocha, Linux
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2mo
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Senior Software Engineer
San Francisco, California, United States
$146k-$235k/yr HybridFull Time
DocuSign
DocuSignNASDAQ: DOCU: Provides electronic signature and agreement management software solutions.
8+ YOEBachelor's in CS or STEM with 8+ years of software engineering experience; full-stack with Java/JavaScript-TS, React; experience with Oracle Fusion Cloud APIs, OIC, Python, AI/ML, cloud-native tech, and CI/CD.
Java, JavaScript, TypeScript, React, OIC, VBCS, APEX, Groovy, PL/SQL, Oracle Fusion Cloud APIs, Python, Django, FastAPI, REST, SOAP, JSON/XML, Docker, Kubernetes, AWS, Azure, Oracle OCI, Jira, Confluence, GitHub Co-Pilot, LLMs, MLOps, RAG
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2mo
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Senior Software Engineer, App
Cambridge or San Francisco
$144k-$240k/yr HybridFull Time
Lila Sciences
Lila Sciences: Develops an AI platform for autonomous scientific research and discovery.
5+ YOEBachelor’s or Master’s in CS/Engineering; 5-8+ years backend/full-stack exp; React, TypeScript, FastAPI, Python; AWS, Kubernetes; AI tooling; strong collaboration.
React, TypeScript, Nx, Tailwind, FastAPI, Python, Pydantic, SQL, NoSQL, AWS, Kubernetes, Terraform, GitHub Actions
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3mo
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Senior Full Stack Software Engineer (Network)
San Jose, California, United States
$156k-$315k/yr HybridFull Time
Hewlett Packard Enterprise
Hewlett Packard EnterpriseNYSE: HPE: Provides global edge-to-cloud technology solutions and IT infrastructure services.
6+ YOESenior full stack engineer with 6+ years experience in React/Redux, Node.js, REST APIs, Linux, and cloud/web applications; strong communication and collaboration.
React, Redux, JavaScript, Node.js, Mocha, REST APIs, Linux
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3mo
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Senior Software Engineer, Education.com
San Mateo, California, United States
$130k-$200k/yr OnsiteFull Time
IXL Learning
IXL Learning: Provides personalized digital learning platforms and educational resources.
6+ YOE6+ years in software engineering; BS or higher in CS; OO programming; Node/React/Next.js; MySQL; REST APIs; AWS (EC2/S3/RDS); MongoDB; strong problem solving and communication; interest in EdTech.
Node.js, React, Next.js, MySQL, REST API, AWS, MongoDB
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3mo
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Senior Software Engineer, Information Systems
San Jose, California, United States
$185k-$215k/yr OnsiteFull Time
Muon Space
Muon Space: Designs, builds, and operates low Earth orbit satellite constellations.
7+ YOE7+ years full-stack software engineering; Python/JavaScript; React/Angular; REST/GraphQL APIs; SQL/NoSQL; PostgreSQL/MongoDB; strong communication.
Python, JavaScript, React, Angular, REST, GraphQL, PostgreSQL, MongoDB, InfluxDB, SQL, NoSQL
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3mo
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Senior Software Engineer
San Francisco or New York City
$180k-$230k/yr HybridFull Time
Beacons
Beacons: All-in-one business platform for content creators and influencers.
Proficient in TypeScript (React) and Python (Flask); AI-native workflow experience; experience with SQL/Postgres; startup experience; strong customer focus.
React, TypeScript, Python, Flask, Firebase, SQL, PostgreSQL
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2mo
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Senior Full Stack Engineer
San Francisco, California, United States
$200k-$300k/yr OnsiteFull Time
Amari
Amari: AI agents automating document-heavy workflows for the logistics industry.
6+ YOE6–8+ years software engineering; strong TypeScript/React; Python; PostgreSQL; AI workflows experience; willingness to work in San Francisco.
TypeScript, React, Tailwind CSS, Python, PostgreSQL
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2mo
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Senior Software Engineer, Full Stack
San Francisco, California, United States
$193k-$290k/yr HybridFull Time
Harvey
Harvey: AI platform for legal research and document analysis.
5+ YOE5+ years in product-focused full-stack software engineering; React/Typescript/CSS (Tailwind) and Python; SaaS experience; strong CS fundamentals; startup-ready.
React, Typescript, TailwindCSS, Python, Postgres
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2mo
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Senior Full-Stack Engineer
San Francisco, California, United States
$175k-$275k/yr OnsiteFull Time
Hedra
Hedra: Builds artificial intelligence models for character-driven video generation.
5+ YOE5+ years of professional experience with JavaScript, React, Next.js, and TypeScript; able to collaborate with design and deliver engineering initiatives; product-focused and user-centric.
Next.js, React, Redux, TypeScript, JavaScript, Python, Golang, AWS, PostgreSQL, Redis, S3, SQS, Playwright, Kubernetes, REST APIs, WebSockets, WASM, IndexedDB, CI/CD
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3mo
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Senior Implementation Engineer
San Francisco, California, United States
$120k-$160k/yr OnsiteFull Time
Metriport
Metriport: Provides an open-source API for healthcare data interoperability.
3+ YOE3+ years in software implementation; full-stack React, TypeScript, Node.js; located in San Francisco Bay Area or willing to relocate; healthcare domain terms a plus.
React, TypeScript, Node.js, AWS, PostgreSQL, DynamoDB, S3, Snowflake, HAPI FHIR
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