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162 app developer jobs at 100 companies in Ontario, CA

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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
1mo
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MSEIT Web App Developer - eMC2 SharePoint
El Segundo, California, United States
$101k-$127k/yr OnsiteFull Time
Modern Technology Solutions, Inc.
Modern Technology Solutions, Inc.: Provides engineering, technology, and cybersecurity services for national security.
2+ YOESecret clearance; BS in CS/Engineering/IT; 2+ yrs Power Apps/Power Automate; SharePoint Online; HTML/CSS/JS; Office; Agile/Scrum; stakeholder communication.
Microsoft Power Apps, Microsoft Power Automate, SharePoint Online, HTML, CSS, JavaScript, Microsoft Office
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1mo
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MSEIT Web App Developer - eMC2 SharePoint
El Segundo, California, United States
$101k-$127k/yr OnsiteFull Time
Modern Technology Solutions
Modern Technology Solutions: Employee-owned defense contractor delivering engineering services and digital transformation.
2+ YOEBS in CS/Engineering or IT; 2+ years Power Apps/Power Automate; SharePoint Online experience; HTML/CSS/JavaScript; Secret clearance or ability to obtain; Agile/Scrum experience.
Power Apps, Power Automate, SharePoint Online, SharePoint Framework, HTML, CSS, JavaScript, Office Suite
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1w
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Senior Full-Stack Engineer, Maritime App
Costa Mesa or Seattle
$191k-$253k/yr OnsiteFull Time
Anduril Industries
Anduril Industries: Defense technology building autonomous military hardware and software.
5+ YOE5+ years software engineering; production web apps with JavaScript/TypeScript and React; familiarity with backend languages (Go, C++, Rust); experience designing architecture, CI/CD, monorepos, and integrating frontend tooling; Bachelor's or equivalent; must be a U.S. Person.
JavaScript, TypeScript, React, Go, C++, Rust, CircleCI, gRPC, protobuf, NixOS
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2d
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iOS Engineer, App Platform
New York City or San Francisco or Los Angeles or Seattle
$170k-$290k/yr RemoteFull Time
Whatnot
Whatnot: Social marketplace for buying and selling via live streams
Proficiency in Swift and SwiftUI, strong iOS fundamentals, product instincts, experience shipping user-facing features, bachelor’s degree or equivalent, ability to work near NY/SF/LA/SEA hubs.
Swift, SwiftUI
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1w
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Manager, Platform App Development
Los Angeles, California, United States
$88k-$115k/yr OnsiteFull Time
LA28
LA28: Organizes the 2028 Olympic and Paralympic Games in Los Angeles.
5+ YOE5+ years technical project/program management delivering cloud solutions, 2+ years building/configuring conversational AI, hands-on GCP experience, strong vendor management, business analysis, and communication skills; Bachelor's degree required.
Google Cloud Platform (GCP), Dialogflow CX, Cloud Functions, Cloud Storage, Vertex AI Agent Builder, Gemini, GCP Console, Smartsheet, Jira, Azure DevOps
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1mo
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CRM Developer
Long Beach, California, United States
$106k-$154k/yr OnsiteFull Time
SCAN Health Plan
SCAN Health Plan: Providing Medicare Advantage plans and integrated healthcare for seniors.
5+ YOEDesign, develop, configure, and support Microsoft Dynamics 365 CRM; integrate with enterprise apps; implement AI/ML capabilities; ensure HIPAA compliance.
Microsoft Dynamics 365, C#, .NET, Power Platform, Azure, REST, SOAP, Azure Functions, Logic Apps, Service Bus, API Management, Power Apps, Power Automate, Power Pages, JavaScript, Plugins
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1mo
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Lead Engineer
New York City or Birmingham or Miami or Tampa or Blue Ash or Cincinnati or Los Angeles
$140k-$199k/yr HybridFull Time
Green Dot
Green DotNYSE: GDOT: Provides mobile banking and payment solutions to consumers and businesses.
8+ YOE8+ years in software engineering; proficiency in .NET/C#, SQL Server; experience with Azure migration, cloud-native apps, CI/CD; familiarity with AI code assistants.
.NET, C#, SQL Server, Azure, AKS, Cosmos DB, App Services, Functions, GitHub Copilot, Claude
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1mo
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Senior iOS Engineer
Irvine or New York City or San Francisco or Seattle
$168k-$262k/yr OnsiteFull Time
Twitch
TwitchNASDAQ: AMZN: Operates a global live streaming platform for interactive content.
6+ YOE6+ years professional iOS development with Swift, experience shipping App Store apps, strong architecture and performance skills, mentoring experience, familiarity with hybrid WebView/React integration.
Swift, React, React Native, WebView, Claude Code, GitHub Copilot, Cursor
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3mo
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Web/UI Developer
March Air Reserve Base, California, United States
$94k-$157k/yr OnsiteFull Time
American Systems
American Systems: Providing engineering and IT solutions to federal government agencies.
5+ YOEU.S. citizen, secret clearance, BS degree, 5-7 years web UI development experience; 2+ years in web app development or 10+ years combined software development/UI design.
OpenLayers, JavaScript, Apache, Elasticsearch, Linux
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1mo
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Software Developer
United States or Missouri or Austin or Boston or Chattanooga or Chicago or Dallas or Denver or Houston or Jefferson City or Kansas City or Los Angeles or Madison or Milwaukee or Minneapolis or Nashville or Oakland or Omaha or Phoenix or Providence or Springfield or Saint Louis or Washington
$105k-$237k/yr HybridFull Time
Husch Blackwell
Husch Blackwell: A nationwide firm providing industry-focused legal and litigation services.
5+ YOEBachelor's in CS/related (or equivalent) and 5+ years enterprise app development/AI/cloud engineering experience; strong C#, .NET, Azure, AI implementation, CI/CD, and cloud-native backend skills.
C#, .NET Core, .NET 8, ASP.NET, Azure App Services, Azure Web Apps, Azure Functions, Durable Functions, Azure Service Bus, Azure SQL Database, Docker, Azure Application Insights, Azure DevOps, GitHub Actions, Git, Azure AI Foundry, Azure OpenAI, Copilot Studio, Entra ID
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2w
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Mobile / Front-End Developer — Mortgage Broker & Retail Experience
Irvine or United States
$135k/yr RemoteFull Time
Success Lending
Success Lending: Modern, agent-aligned mortgage lending services for homebuyers.
4+ YOE4+ years front-end or mobile development; shipped mobile app; strong JavaScript/TypeScript and React Native/Flutter or Swift/Kotlin; experience with REST/GraphQL, auth and secure storage; daily use of AI coding tools; U.S. work authorization required.
React Native, Flutter, Swift, Kotlin, JavaScript, TypeScript, REST, GraphQL, Claude Code, GitHub Copilot, Cursor, Blue Sage, LOS, App Store, Google Play
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2mo
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Loopnet - Senior iOS Engineer
Irvine, California, United States
$130k-$204k/yr HybridFull Time
CoStar Group
CoStar GroupNASDAQ: CSGP: Provides global real estate information, analytics, and online marketplaces.
5+ YOE5+ years of iOS app development; expert in Objective-C, SwiftUI/Swift, Cocoa, Xcode; MVC/MVVM; Bachelor’s degree.
Objective-C, Swift, SwiftUI, Cocoa Framework, Xcode, Interface Builder
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2mo
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Software Developer (Rialto, CA, US, 92376)
Rialto, California, United States
$101k-$149k/yr OnsiteFull Time
syncreon
syncreon: Provides specialized warehouse management and supply chain logistics services.
Degree in IT or related field; relational databases; development project delivery; Unix/Linux knowledge; ability to work under pressure and adapt to global apps.
Progress, Unix/Linux, SQL
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2mo
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Software Engineer, Web
Irvine, California, United States
$155k-$200k/yr OnsiteFull Time
Field AI
Field AI: Develops autonomous software brains for robots in unstructured environments.
5+ YOE5–10+ years of production web development with TypeScript/React/Node.js; API design; AWS experience; MongoDB/Redis; able to ship production web apps.
TypeScript, JavaScript, Node.js, React, Python, AWS, MongoDB, Redis
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3w
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ServiceNow Developer
McLean or Tysons Corner or Orlando or Charlotte or Detroit or Mitchell or Boulder or Philadelphia or Miami or Boston or Burlington or El Segundo or Austin or Houston or San Antonio or Columbia or Jacksonville or Lewisville or Salt Lake City or New York City or Fairview Heights or Arlington or Sacramento or Tampa or Beavercreek or Folsom or Chicago or Huntsville or Atlanta or Los Angeles
$113k-$188k/yr HybridFull Time
Guidehouse
Guidehouse: Provides management and technology consulting services to diverse organizations.
3+ YOEUS citizen with ability to obtain Public Trust, bachelor\u0002s degree, 3+ years professional experience, ServiceNow expertise (GRC, SPM, ITSM, App Engine, Scoped Apps), JavaScript/Glide/AngularJS scripting, Flow Designer, IntegrationHub, web services (SOAP/REST), SDLC and Agile experience.
ServiceNow, GRC, SPM, ITSM, App Engine, Scoped Apps, Mid-Server, SOAP, REST, JavaScript, Glide, AngularJS, Flow Designer, IntegrationHub, ServiceNow Automated Test Framework (ATF)
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2mo
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Software Engineer, UI/UX
El Segundo, California, United States
$131k-$150k/yr RemoteFull Time
ImmunityBio
ImmunityBioNASDAQ: IBRX: Develops next-generation immunotherapies for cancer and infectious diseases.
3+ YOE3+ years frontend development with Next.js, Svelte, and React; iOS/Android app experience; design tooling preferred.
Next.js, Svelte, React, React Native, TypeScript, Node.js, Bun, Figma, Sketch
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1mo
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Power Platform Developer
Los Angeles or United States
OnsiteFull Time
World Vision
World Vision: Provides humanitarian aid and development services to vulnerable children globally.
5+ YOEBachelor's degree in programming/systems, 5+ years application programming experience, expert in Power Apps, Power Automate, Dataverse, Copilot Studio, Power BI; experience with ALM (Azure DevOps/GitHub) and Copilot/agent development; willingness to travel internationally.
Power Apps, Power Automate, Dataverse, Copilot Studio, Microsoft Copilot Studio, Power BI, AI Builder, Microsoft Fabric, SharePoint, Microsoft Teams, Microsoft 365, Azure, Azure DevOps, GitHub, REST, OData
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3d
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Senior Software Engineer
Los Angeles or Seattle
$143k-$214k/yr OnsiteFull Time
Re:Build Manufacturing
Re:Build Manufacturing: Provides advanced engineering and US-based contract manufacturing services.
7+ YOE7+ years professional software experience; cloud-native development on AWS; full‑stack with React and TypeScript; experience with serverless, containerized apps, RAG/LLM integrations, GraphQL/REST; strong communication and mentorship skills.
React, TypeScript, AWS, Lambda, ECS, DynamoDB, S3, Step Functions, API Gateway, Fargate, GraphQL, LLMs, vector databases
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3w
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Senior Full-Stack Developer
Costa Mesa, California, United States
OnsiteFull Time
TOCA Soccer
TOCA Soccer: Operates technology-enabled soccer training and entertainment centers.
5+ YOE5+ years building full-stack web or native apps; strong React, TypeScript, JavaScript, and Node.js skills; experience with AI-assisted development tools; cross-functional collaboration; experience with CRM/booking/subscription products.
TypeScript, JavaScript, React, Node.js, Expo, React Native, PostgreSQL, MySQL, MongoDB, AWS, GCP, Cursor, Claude Code, GitHub Copilot
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1mo
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Full-Stack Developer (Contract)
Brea, California, United States
$156k-$181k/yr OnsiteContract
Samyang America
Samyang America: Distributes and markets instant noodles and packaged food products.
5+ YOEBilingual English/Korean; 5+ years professional software development; strong full-stack web app experience; cloud platform experience (AWS, Azure, DigitalOcean); GitHub; secure authentication and workflow automation expertise; excellent documentation and communication.
AWS, Azure, DigitalOcean, GitHub
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