1,311 react engineer jobs at 601 companies in Mill Valley, CA
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Senior React Native Engineer
San Francisco or Los Angeles
$160k-$210k/yrOnsiteFull Time
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).
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
CareerSwift: AI-powered recruitment and job search automation platform
Basic React experience, comfortable with HTML/CSS/JavaScript, Git proficiency, English communication skills, able to work independently. Side projects and coursework accepted.
Hinge HealthNYSE: HNGE: Digital provider of musculoskeletal care and physical therapy
4+ YOE4+ years software engineering experience, 2+ years React Native, BS in CS/Engineering or equivalent, strong TypeScript/JavaScript skills, experience with server-driven UI and experimentation preferred.
Guild.ai: Building a neutral control plane for production AI agents.
Strong production experience with React and TypeScript, comfortable working with Python backends, API design, frontend architecture, performance, testing, and collaborating with designers.
Sourcetable: AI-powered spreadsheet platform that automates data analysis.
9+ YOEProven Python and React experience, 9+ years, CS degree or equivalent, startup experience, ownership of projects, focus on scalability and performance.
Deep Origin: Platform for scientific simulation and drug discovery research.
10+ YOE10+ years building scalable distributed systems; 5+ years with React/TypeScript/JavaScript/NodeJS; experience with Postgres, MongoDB, Kubernetes, cloud infra, multi-tenant systems; authorized to work in the U.S.; strong system design skills.
GC AI: AI-powered legal platform for in-house legal teams.
5+ YOE5+ years full‑stack engineering experience; React and modern TypeScript; SQL and data analysis; analytics platforms (Google Analytics, Segment, Mixpanel); A/B testing and experimentation; experience building marketing-focused features.
Clera: AI talent agent matching professionals with high-growth startup roles
8+ YOE8+ years full-stack engineering with backend (FastAPI, Python, MongoDB), frontend (React, TypeScript), API design (REST/GraphQL), ownership of product modules, and strong correctness for financial logic.
Fazeshift: AI-powered automation platform for enterprise accounts receivable workflows.
8+ YOE8+ years software engineering experience, strong TypeScript and React skills, production systems reliability, API and scalability expertise, staff-level technical leadership and mentoring, early-stage startup experience preferred.
Petra Security: AI-powered identity threat detection for Microsoft 365 environments.
Frontend engineering experience building production React/TypeScript UIs; familiarity with Node and Python; strong product design sensibility, prototyping skills, and experience shipping customer-facing software.
Canva: Online graphic design platform for creating and editing visual content.
10+ YOE10+ years software engineering with partner/platform experience, shipping production platform code, prototyping solutions, strong TypeScript/React skills, familiarity with MCP and Java, and excellent communication.
Gusto: Cloud-based payroll and HR software for small businesses.
8+ YOE8+ years software development experience; experience with Ruby on Rails, JavaScript/React; building AI agents; mentoring engineers; compliance-domain experience preferred.
Ruby on Rails, JavaScript, React, Claude Code, Codex
Mercor: Connecting expert human intelligence with frontier AI model development.
3+ YOE3+ years software engineering experience; strong backend fundamentals (API design, data modeling, distributed systems, relational databases); full-stack familiarity (React/TypeScript); experience with LLM-powered features and AI coding tools; strong testing, debugging, and product intuition.
React, TypeScript, Cursor, Claude Code, GitHub Copilot, Codex
AdyenEuronext Amsterdam: ADYEN: Unified payment platform for global business commerce.
Product-minded architect with applied AI experience (LLMs, RAG), production-grade full-stack skills, security-by-design for financial data, strong Java and TypeScript/React/Vue expertise, and experience mentoring engineers.
Applied MaterialsNASDAQ: AMAT: Manufacturers of equipment for semiconductor and display production.
Master's in a data science or engineering field required; strong ML/DL and time-series skills; experience with data cleaning, signal processing, visualization; proficient in Python, React, and SQL; strong technical communication.
Fireworks AI: Provides high-performance generative AI model inference and deployment infrastructure.
3+ YOE3+ years software engineering experience, strong full-stack skills (React/TypeScript, Python or Go), experience shipping developer-facing products, API and product ownership, high velocity and ownership.