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45 dotnet full stack developer jobs at 25 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
2w
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Full Stack Developer III
Berkeley or Los Angeles
$111k-$166k/yr HybridFull Time
PBK
PBK: Provides architectural and engineering design for specialized facilities.
7+ YOE7+ years full-stack development experience, proficiency with JavaScript/TypeScript, React, backend tech (Node.js/.NET/C#/Python), Azure, API integrations, CI/CD, and secure development practices; bachelor\u0002s degree preferred.
React, TypeScript, Node.js, .NET, C#, Python, Salesforce, Deltek Vantagepoint, Autodesk Forma, Microsoft Azure, GitHub Enterprise, Azure DevOps, Microsoft 365, Microsoft Graph API, Microsoft SharePoint, Docker, Azure Monitor, Application Insights, Log Analytics
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2w
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Senior Engineer, Full-Stack
Temecula, California, United States
OnsiteFull Time
FFF Enterprises
FFF Enterprises: Distributes specialty biopharmaceuticals and provides healthcare supply chain services.
7+ YOE7+ years full‑stack SaaS development experience, bachelor’s in CS or equivalent, proficiency with backend (.NET), frontend (React/Angular), SQL, Azure services, CI/CD/DevOps, and experience in regulated healthcare or similar.
.NET, React, Angular, GraphQL, Azure, Microsoft App Services, Microsoft Functions, AKS, CI/CD, DevOps, SQL, FHIR, HL7
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2w
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Senior Engineer, Full-Stack
Temecula, California, United States
OnsiteFull Time
FFF Enterprises
FFF Enterprises: Specialty pharmaceutical and vaccine distributor for healthcare providers.
7+ YOE7+ years full‑stack SaaS development experience, bachelor’s degree (or equivalent), cloud (Azure) and CI/CD/DevOps experience, backend (.NET) and frontend (React/Angular) proficiency, strong SQL and API/integration skills.
.NET, React, Angular, SQL, GraphQL, FHIR, HL7, Azure, App Services, Functions, AKS, CI/CD
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2mo
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Full Stack Engineer, Senior
Oakland or Seattle or WA or OH or CA or Long Beach or AZ or CO or CT or FL or GA or MD or MN or NV or OR or El Dorado Hills or Lodi or Rancho Cordova or Redding or San Diego or Woodland Hills or AL or IL or VA or WI or TX or NY
$103k-$174k/yr HybridFull Time
Ascendiun
Ascendiun: Nonprofit parent overseeing health insurance and clinical service organizations.
5+ YOE5+ years full stack development; BA/BS or equivalent IT experience; React/Vue/Angular; .NET/Java/Node.js/Python APIs; SQL/NoSQL; Azure preferred; Docker; IaC; CI/CD; AI tools; healthcare experience preferred.
React, Vue, Angular, JavaScript, TypeScript, .NET, Java, Node.js, Python, MS SQL Server, Oracle, NoSQL, REST, Azure, AWS, GCP, Docker, Kubernetes, Ansible, Bicep, ARM, Terraform, GitHub, GitLab, Bitbucket, Git
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4d
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Senior Full Stack Developer
Los Angeles, California, United States
$125k-$145k/yr HybridFull Time
Motion Picture Industry Pension & Health Plans
Motion Picture Industry Pension & Health Plans: Administers health and retirement benefits for the entertainment industry.
10+ YOEBachelor's degree or equivalent,10+ years full‑stack experience,Next.js and .NET Core microservices, Kubernetes, SQL, CI/CD, production support, strong communication and problem solving.
Next.js, .NET Core, Kubernetes, SQL, Contentful, Power BI, Microsoft Fabric, Microsoft Office, Docker, React.js, Azure
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1mo
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Full Stack Developer
Norco, California, United States
$90k-$190k/yr OnsiteFull Time
CACI International
CACI InternationalNYSE: CACI: Provides information technology and engineering services for government agencies.
5+ YOEBachelor's degree or equivalent, 5+ years software development experience, proficiency in Java/C#/Python/JavaScript/HTML/CSS, React/Angular, Node.js/.NET, cloud platforms, Microsoft SQL Server, Git; CompTIA Security+ and ability to obtain DoD SECRET; U.S. citizenship; onsite in Norco, CA.
Java, C#, Python, JavaScript, HTML, CSS, React, Angular, Node.js, .NET, AWS, Azure, Google Cloud, Microsoft SQL Server, Git, Docker, Kubernetes, CI/CD
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3mo
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Full Stack Software Engineer (Application Software)
Hawthorne, California, United States
$125k-$175k/yr OnsiteFull Time
SpaceX
SpaceX: Designs and launches advanced rockets and satellite internet constellations.
1+ YOEBachelor's in CS/engineering/math or 2+ years software experience; 1+ year full stack development; strong Python/JavaScript/Java etc.
Python, C#.NET, Go, Scala, Java, JavaScript, Docker, Kubernetes, Terraform, Ansible, Puppet, Apache Kafka, RabbitMQ, ActiveMQ, Gradle, Bazel, Pants, Buck, Pip, npm, Unix, Linux
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2d
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Senior Engineer, Full-Stack
Temecula, California, United States
$145k-$160k/yr OnsiteFull Time
FFF Enterprises
FFF Enterprises: Distributes specialty biopharmaceuticals and manages critical healthcare inventory.
7+ YOEBachelor's degree, 7+ years full-stack SaaS experience, proficiency with Azure and cloud-native architectures, backend (.NET), frontend (React/Angular), SQL/data modeling, security and healthcare compliance (PHI,21 CFR Part 11).
Azure, App Services, Functions, AKS, .NET, React, Angular, GraphQL, SQL, FHIR, HL7, CI/CD
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3w
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LoopNet - Senior Full Stack Engineer
Irvine or Orange County or United States
$124k-$187k/yr HybridFull Time
CoStar Group
CoStar GroupNASDAQ: CSGP: Provides global real estate information, analytics, and online marketplaces.
7+ YOEBachelor's degree required; 7+ years production C#/.NET development; front-end experience with Vue/React/Angular in TypeScript; experience with AWS (S3, SQS, Dynamo, ElastiCache), Apache Kafka, Datadog, and relational databases; unit-testable development and mentoring experience.
C#, .NET, .NET Core, TypeScript, Vue, React, Angular, AWS S3, SQS, Dynamo, ElastiCache, Apache Kafka, Datadog, Claude Code, GitHub Copilot, MS SQL, MySQL, Git
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1mo
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Full Stack Developer
Norco, California, United States
$90k-$190k/yr OnsiteFull Time
CACI
CACINYSE: CACI: Provides information technology and professional services to government clients.
5+ YOE5+ years software development; Bachelor's in CS/Engineering or equivalent; proficiency in Java/C#/Python/JavaScript, front-end (React/Angular), back-end (Node.js/.NET), cloud (AWS/Azure/Google Cloud), Microsoft SQL Server, Git; CompTIA Security+; must obtain DoD SECRET and be U.S. citizen; onsite Norco, CA.
Java, C#, Python, JavaScript, HTML, CSS, React, Angular, Node.js, .NET, AWS, Azure, Google Cloud, Microsoft SQL Server, Git, Docker, Kubernetes, CI/CD
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2w
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Lead Applications Developer-Full Stack
Irvine, California, United States
$134k-$187k/yr OnsiteFull Time
West Coast University
West Coast University: Private university offering degree programs for healthcare professionals.
5+ YOE5+ years hands-on full stack web and microservices development with C#/.NET, JavaScript/TypeScript, SQL Server, and React or Angular; technical leadership experience; Bachelor's degree in CS/IT/IS or equivalent experience; experience with LLM-based coding agents.
ASP.NET, SQL Server, SQL, HTML, XML, CSS, JavaScript, TypeScript, C#, VB.NET, React, Angular, LLM, Claude, OpenCode
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2w
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Front End Senior Full Stack Developer- Mortgage Automation (AI-First)
Irvine or United States
$135k/yr RemoteFull Time
Success Lending
Success Lending: Modern, agent-aligned mortgage lending services for homebuyers.
5+ YOE5+ years full-stack development, daily use of AI coding tools, cloud experience (AWS/Azure), RESTful API integration, modern front-end frameworks and backend languages; mortgage technology experience preferred; must be authorized to work in the U.S.
JavaScript, TypeScript, React, Angular, Node.js, Python, Java, C#/.NET, SQL, RESTful APIs, AWS, Azure, Lambda/Functions, CI/CD, Claude Code, GitHub Copilot, Cursor, Blue Sage, Kwikie, Gateless, Cotality, Encompass, MeridianLink, DU/LP, Optimal Blue
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3w
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LoopNet - Senior Full Stack Engineer
Irvine, California, United States
$124k-$187k/yr HybridFull Time
CoStar Group
CoStar GroupNASDAQ: CSGP: Global provider of commercial and residential real estate data.
7+ YOEBachelor's degree required; 7+ years production C#/.NET experience; experience with TypeScript frameworks (Vue/React/Angular), AWS services (AWS S3, SQS, Dynamo, ElastiCache), Apache Kafka, Datadog; unit testing and database/SQL experience; strong communication.
C#, .NET, .NET Core, TypeScript, Vue, React, Angular, AWS S3, SQS, Dynamo, ElastiCache, Apache Kafka, Datadog, Claude Code, GitHub Copilot, MS SQL, MySQL, Git
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4w
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Senior Full Stack Developer (Workforce Benefits Billing)
Newport Beach, California, United States
$125k-$153k/yr OnsiteFull Time
Pacific Life
Pacific Life: Provides life insurance, annuities, and investment products for financial security.
5+ YOEBachelor's in Computer Science (or related) and 5+ years application development; experience with Java or .NET, cloud (AWS), CI/CD, API integration/MuleSoft, and modern containerization preferred.
Java, .NET, AWS, Azure DevOps, GitHub Actions, MuleSoft, Docker, Kubernetes, CI/CD
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1mo
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Full Stack Software Engineer
Los Angeles or Houston
$100k-$140k/yr HybridFull Time
GMV
GMV: Engineering and technology solutions for space, defense, and cybersecurity.
5+ YOE5+ years C#/.NET, SQL, testing, caching, React; strong communication; ability to lead when needed.
C#, DOTNET, SQL, React, Docker, Redis, RabbitMQ, Kafka, CI/CD, Cursor, Copilot
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2mo
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Full Stack Software Engineer – UI/UX & Web Engineering (Azure)
New York or Washington or Denver or Seattle or Los Angeles or Chicago or Austin or Dallas
OnsiteFull Time
WSP
WSPToronto Stock Exchange: WSP: Provides engineering, design, and environmental consultancy services globally.
12+ YOEBachelor's degree; 12+ years full-stack experience; strong React/Vue; REST APIs; Python/Node/.NET; Azure services; DevOps; Git; Agile.
React, Vue, Python, Node.js, .NET, REST APIs, Azure, Azure App Services, Azure Functions, Cosmos DB, Azure Storage, CI/CD, Git
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2mo
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Senior Full Stack Cloud Developer (.Net / Azure)
Irvine, California, United States
$155k-$172k/yr HybridFull Time
Home Franchise Concepts
Home Franchise Concepts: Provides franchising platforms for home and lifestyle services.
7+ YOESenior full stack developer with 7+ years, Azure cloud, .NET/C#, Angular, REST APIs, CI/CD, IaC (Terraform), AI tooling.
C#, .NET, Azure, Azure DevOps, Terraform, Angular, REST APIs, GitHub Copilot, Seq, SolarWinds, New Relic
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1mo
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Software Engineer Full Stack (Pricing Engine)
Irvine, California, United States
$90k-$134k/yr HybridFull Time
Xe
XeNASDAQ: EEFT: Provides international money transfers and online currency exchange services.
3+ YOE3+ years building production web applications; strong frontend with Vue.js or React; backend proficiency in C#/.NET (or Java/Kotlin/Go); SQL and AWS (SQS, DynamoDB, S3, ECS, Lambda); writing tests and using agentic coding tools.
Vue.js, React, C#, .NET, Java, Kotlin, Go, SQL, Copilot, Cursor, Claude Code, AWS, SQS, DynamoDB, S3, ECS, Lambda, Memcached, Redis, Jira, Confluence, Postman, Bruno
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2mo
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Full-Stack Software Engineer (Application Software)
El Segundo, California, United States
$108k-$154k/yr OnsiteFull Time
Rangeview
Rangeview: Operates an automated foundry producing precision metal aerospace parts.
2+ YOE2+ years building production web apps; frontend with TypeScript and React; backend with C#, ASP.NET, Entity Framework; relational DB design; ability to work onsite in El Segundo and meet U.S. Person requirements.
TypeScript, React, C#, ASP.NET, Entity Framework, Next.js, MUI, Hot Chocolate, GraphQL
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1mo
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Principal Engineer - FullStack – Catalog
Irvine, California, United States
$130k-$135k/yr OnsiteFull Time
Tech Mahindra
Tech MahindraNational Stock Exchange of India: TECHM: Global provider of information technology and business process services.
12+ YOEBachelor's degree required; 12+ years software engineering with principal-level leadership, expertise in backend languages and modern frontend frameworks, high-scale distributed systems, and AI-assisted development.
C#/.NET, Go, Java, Python, React, Copilot, Claude Code, Cursor
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