125 javascript react developer jobs at 73 companies in Simi Valley, CA
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Javascript - Senior Developers - AI Training - Long Beach, US
Long Beach, California, United States
$50/hrRemoteContract
Prolific: Platform connecting researchers and AI developers with verified participants.
BS/MS/PhD in CS or related; professional experience building scalable web apps with JavaScript/TypeScript; ability to solve LeetCode Medium–Hard problems; deep knowledge of JS internals and modern ES6+ practices; expertise in testing and frameworks.
Fox CorporationNasdaq: FOXA: Broadcasts news, sports, and entertainment via television and streaming.
3+ YOEBachelor's in CS/related, 3 years experience, strong skills in JavaScript, React, HTML, CSS, TypeScript, CMS/Matrix, video playback optimization, PWA, API and infrastructure development.
JavaScript, React, HTML, CSS, TypeScript, Matrix, Progressive Web Apps (PWA)
Ritchie Bros.NYSE: RBA: Conducts global auctions for heavy equipment and industrial assets.
Experience with Python, JavaScript and frameworks (Angular or React), relational/document stores (PostgreSQL or Firestore), familiarity with Google Cloud Platform, unit and end-to-end testing, troubleshooting, and agile development.
Python, JavaScript, Angular, React, PostgreSQL, Firestore, Google Cloud Platform
ALKEME Insurance: Insurance brokerage and risk management services provider.
Bachelor's degree or equivalent experience; proven software development with Java, Python, C#, or JavaScript; familiarity with web frameworks (React, Angular, Node.js) and SQL/NoSQL; strong problem-solving and teamwork skills.
Astrana HealthNASDAQ: ASTH: Operates technology-powered platforms to coordinate and deliver medical care.
8+ YOE8+ years software development experience, strong Python and React/JavaScript skills, SQL proficiency, API/backend experience, leadership and mentoring ability; Bachelor’s in CS or equivalent experience.
InformaLondon Stock Exchange: INF: Organizing international business events and publishing academic research journals
8+ YOE8+ years software development experience with strong React and Node.js skills; proficiency in JavaScript, front-end technologies, REST APIs, cloud platforms, databases, CI/CD; BS/BA preferred.
El Segundo or Los Angeles or San Francisco or Berlin or United States or China
$100k-$130k/yrHybridFull Time
JustFab: Membership-based online retailer of fashion footwear and accessories.
2+ YOE2+ years web and Shopify development experience; strong Liquid, React, HTML/CSS/JavaScript, and Shopify API skills; Bachelor’s degree in a related field; fluent English; U.S. work authorization; Mandarin preferred.
Denver or San Francisco or New York or Toronto or Los Angeles or Seattle
$163k-$247k/yrHybridFull Time
Gusto: Cloud-based payroll and HR software for small businesses.
8+ YOE8+ years software development experience, PEO experience preferred, experience with large Ruby on Rails and JavaScript/React applications, AI tool fluency, and mentoring ability.
ImmunityBioNASDAQ: IBRX: Develops next-generation immunotherapies for cancer and infectious diseases.
3+ YOE3+ years full-stack or mobile development; strong JavaScript/TypeScript; React/Next.js/Svelte; mobile iOS/Android; Docker/Kubernetes preferred; AI/LLM frameworks preferred.
Helios Worldwide: Global agency providing AI-powered marketing and workforce management solutions.
5+ YOECollege graduate in CS or related field (or equivalent experience), 5+ years development experience, proficiency in Vue/React, HTML, JavaScript, CSS, Git, state management libraries, cloud deployment experience; PHP/WordPress a plus.
Fanatics: A global digital sports platform for merchandise and collectibles.
5+ YOE5+ years of professional full stack development; JavaScript/TypeScript, React, Node.js; analytics/tracking, A/B testing, APIs; scalable systems; cross-functional collaboration.
Fashion Nova: Sells affordable trend-driven apparel and lifestyle accessories online.
10+ YOE10+ years software development experience; proficiency in Javascript, React, Node.js, REST/Web API, relational and NoSQL databases; strong analytical and communication skills; BA/BS or equivalent experience preferred.
AXS: Provides digital ticketing and marketing solutions for live events.
7+ YOE7+ years software development experience with technical lead responsibilities; BS in CS or related; strong front-end expertise (JavaScript/TypeScript, React), full-stack experience, distributed systems, DB familiarity, and excellent communication.
Los Angeles or Alabama or Alaska or Delaware or District of Columbia or Hawaii or Iowa or Louisiana or Mississippi or Nebraska or New Mexico or Rhode Island or South Dakota or West Virginia or United States
$140k/yrHybridFull Time
TeamSnap: Software platform for managing youth sports teams and leagues.
2+ YOE2+ years software engineering experience; strong backend skills with Node and TypeScript/JavaScript, frontend experience with React, SQL/relational databases, distributed systems and API development.
SonyNYSE: SONY: Sells consumer electronics, video games, and entertainment media.
5+ YOE5+ years experience in full-stack development with Java, Go, or Python; REST API and frontend (HTML/CSS/JavaScript/React) proficiency; hands-on experience with AI-native coding tools, prompt engineering, agent development, and participation in on-call rotations.
AEG Worldwide: Operates live entertainment venues and professional sports franchises worldwide.
7+ YOE7+ years software development with technical lead experience; BS in CS preferred; deep front-end expertise (JavaScript/TypeScript, React); back-end proficiency (C#/.NET, Node.js, Python, Go); experience with databases, cloud, containers, Git/CI-CD.
London or San Francisco or Los Angeles or New York City or Singapore or Beijing or Seoul or Tokyo or Vancouver or North America or Europe or Africa or Asia or South America
HybridFull Time
Sensor Tower: Provides digital market intelligence and mobile app analytics software.
4+ YOE4+ years software engineering experience with deep expertise in JavaScript/TypeScript and React; experience architecting complex state management, testing with Jest/Playwright, web performance, and mentoring peers.
Software Engineer, Front End Developer (Experienced or Senior)
Albuquerque or Kent or El Segundo
$127k-$232k/yrOnsiteFull Time
BoeingNYSE: BA: Designing and manufacturing commercial aircraft and defense systems.
3+ YOEBachelor's degree or equivalent, 3+ years front-end experience (HTML5, JavaScript, REACT), active U.S. Top Secret clearance required, strong CS fundamentals and object-oriented design.
The Walt Disney CompanyNYSE: DIS: Produces media content and operates global theme parks.
3+ YOE3+ years building web or enterprise applications; experience with Laravel/WordPress/LAMP, JavaScript/React/Java, REST, EM standards; bachelor's in CS or related field required.
Mountain View or San Francisco or Los Angeles or New York City
$170k-$240k/yrHybridFull Time
Commure: AI-powered software platform for healthcare workflow and administrative automation.
5+ YOE5+ years building scalable full-stack applications; proficiency with JavaScript/React, Python, and PostgreSQL; strong architecture, observability, performance, and mentoring skills.