77 dotnet developer jobs at 44 companies in Winchester, CA
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Web Developer I
Anaheim, California, United States
$101k-$160k/yr HybridFull Time
3+ YOEHigh school diploma and 3+ years of software development experience in Windows environments. Requires AI-assisted development and version-control experience plus SQL, APIs, SSO, HTML, CSS, .NET, and scripting knowledge.
Claude, Codex, Figma, GitHub, Microsoft SQL, Microsoft Office, API, SSO, SQL, HTML, CSS, .NET, GitHub Copilot, Git, SQL Server Reporting Services, Agile, Waterfall
1mo
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Senior Software Engineer
Lake Forest or Houston or Philadelphia
$124k-$207k/yr HybridFull Time
Strong software development in C# (.NET) or Node.js; hands-on Microsoft Azure cloud experience; CI/CD, DevOps, container experience; knowledge of cloud architecture, networking, and secure development practices.
Microsoft Azure, C#, .NET, Node.js, CI/CD
1mo
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LoopNet - Lead Software Engineer
Irvine or Orange County
$144k-$222k/yr HybridFull Time
9+ YOEBachelor's degree required; 9+ years production C#/.Net development; experience with TypeScript front-ends (Vue/React/Angular), AWS services (S3, SQS, Dynamo, ElastiCache), Kafka, Datadog, SQL and database development; 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, SQL
2w
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Illustrations Applications Developer
Newport Beach, California, United States
$103k-$126k/yr OnsiteFull Time
2+ YOE2+ years application development experience; bachelor\u0002s degree or equivalent; strong skills in .NET, VB.NET, C#, JavaScript, HTML, CSS, SQL and Microsoft Excel; knowledge of life insurance/annuity products preferred.
Microsoft Excel, .NET, VB.NET, C#, JavaScript, HTML, CSS, jQuery UI, Bootstrap, SQL
2w
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Full Stack Developer
Chino or United States
OnsiteFull Time
6+ YOE6+ years full stack development with C#, .NET Core, ASP.NET Core, SQL Server and JavaScript; experience with React/Angular/Vue, Azure, Docker, CI/CD, Git, EMR not required; Bachelor's or equivalent.
C#, .NET Core, ASP.NET Core, REST APIs, HTML, CSS, JavaScript, React, Angular, Vue.js, SQL Server, Entity Framework Core, ColdFusion (CFML), Microsoft Azure, Docker, CI/CD, Git, LLM
1mo
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SOFTWARE DEVELOPER (.NET/C#)
Norco, California, United States
$95k-$150k/yr OnsiteFull Time
3+ YOEOn-site Norco role requiring 3+ years software development experience with C#/.NET desktop applications, OOP, multi-threading/TPL, Git, strong communication, U.S. citizenship, and ability to obtain a U.S. government security clearance.
C#, .NET, Delphi, Unity, Git, Jira, Confluence, Avalonia UI, WPF, WinUI, MAUI, Task Parallel Library (TPL), SAFe, Scrum
1mo
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Senior Full Stack Developer
Carlsbad, California, United States
$125k-$150k/yr OnsiteFull Time
7+ YOE7+ years web development experience with C#, .NET, and SQL; experience with React, REST APIs, GitHub; mentoring and strong communication skills; familiarity with Agile.
C#, .NET, SQL, React, Python, Next.js, Kafka, TeamCity, Jenkins, Postman, Bruno, MongoDB, Elastic Stack, GitHub
1mo
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Senior Full Stack Developer
Carlsbad, California, United States
$125k-$150k/yr OnsiteFull Time
7+ YOE7+ years web development experience; strong expertise in C#, .NET, and SQL; experience with React, REST APIs, GitHub, Agile; mentoring and strong communication skills.
C#, .NET, SQL, React, REST APIs, GitHub, Python, Next.js, Kafka, TeamCity, Jenkins, Postman, Bruno, MongoDB, Elastic Stack
1mo
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Full Stack Developer
Norco, California, United States
$90k-$190k/yr OnsiteFull Time
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
4w
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Sr. Web Developer - AEC Integration
Redlands, California, United States
$123k-$202k/yr OnsiteFull Time
5+ YOE5+ years software product development; experience with cloud infrastructure, backend services, data pipelines; strong skills in TypeScript/JavaScript or C++/.NET/Python; agile and git proficiency; bachelor's degree in CS or related field.
TypeScript, JavaScript, NodeJS, Bootstrap, React, Angular, C++, .NET, Python, git, Amazon AWS, Microsoft Azure, Autodesk Docs, Autodesk Platform Services, Autodesk Forma, ArcGIS Experience Builder, ArcGIS, IFC, 3D Tiles, Esri i3s, ObjectArx, Revit APIs
1mo
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Software Engineer - AI
Irvine, California, United States
$99k-$158k/yr HybridFull Time
3+ YOEBachelor's degree and 3+ years experience. Strong Python required; proficiency in Java or .NET (C#). Experience with LLMs, agent development, RAG, vector databases, cloud platforms, data processing, and APIs.
Python, Java, .NET, C#, Agent Development Kit (ADK), LangChain, NumPy, Pandas, Scikit-learn, NLTK, SpaCy, PostgreSQL, pgvector, Pinecone, Weaviate, ChromaDB, Google Cloud Platform (GCP), Amazon Web Services (AWS), Microsoft Azure (Azure), ReactJS, OpenAI, Google DeepMind, Anthropic, MCP (Model Context Protocol), LangGraph, CrewAI, Semantic Kernel, AutoGen, Docker, Kubernetes, REST APIs, JSON, XML, CI/CD
3w
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LoopNet - Senior Software Engineer
Irvine, California, United States
$124k-$187k/yr HybridFull Time
7+ YOE7+ years production C#/.NET development, bachelor's degree, experience building APIs/backends, testing, cloud (AWS) experience, mentoring, and familiarity with AI coding tools.
C#, .NET, .NET Core, Claude Code, GitHub Copilot, Vue.js, React, TypeScript, Microsoft SQL, MySQL, AWS S3, SQS, DynamoDB, ElastiCache, Apache Kafka, Datadog, Docker, Kubernetes, CI/CD, BigQuery, Databricks, Snowflake, Python
1mo
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Senior Software Engineer
Carlsbad, California, United States
$140k-$160k/yr OnsiteFull Time
5+ YOE5+ years commercial R&D software development; strong C#/.NET skills; experience with distributed systems (RabbitMQ), Windows apps, testing, CI/CD, requirements tools (DOORS/Jama/Ketryx), Confluence, and regulated (FDA/QSR, IEC 62304/ISO 13485) environments.
C#, .NET, WPF, RabbitMQ, GitHub, Microsoft Azure DevOps, DOORS, Jama, Ketryx, Confluence, AI agents, AI-powered code generation tools
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Customer Relationship Management (CRM) Software Developer II
Fullerton, California, United States
OnsiteFull Time
2+ YOEBachelor's degree in a related field and two years of relevant experience or equivalent; software development, CRM, database, integration, analytical, communication, and project management skills required.
Customer Relationship Management (CRM), SQL, Microsoft Excel, JSON, ETL, APIs, Dell Boomi, Apex, .NET, Java, XML
2w
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Application Developer
Rancho Santa Margarita, California, United States
$80k-$120k/yr OnsiteFull Time
3+ YOEBachelor's in CS/IT/Software Engineering or equivalent experience; proficiency in C#/.NET Core, React, TypeScript; 3+ years experience; knowledge of SQL Server/PostgreSQL/Azure Cosmos DB, Azure deployments, CI/CD, automated testing, and strong communication.
C#, .NET Core, React, TypeScript, SASS, SCSS, Flexbox, CSS Grid, Webpack, Vite, npm, yarn, SQL Server, PostgreSQL, Azure Cosmos DB, RESTful, GraphQL, Azure, App Services, Azure Functions, Docker, Kubernetes, Figma, xUnit, NUnit, Cypress, Playwright, React Testing Library, Azure Active Directory (Azure AD), Auth0, Azure DevOps, GitHub Actions, GitHub Copilot, Git, Azure Service Bus, RabbitMQ
2mo
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Principal Engineer - FullStack – Catalog
Irvine, California, United States
$130k-$135k/yr OnsiteFull Time
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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Software Development Engineer in Test (SDET)
New Braunfels or Orange
$95k-$110k/yr HybridFull Time
3+ YOEBachelor's degree or equivalent experience; 3+ years in software testing or development with test automation; programming, .NET testing, automation frameworks, APIs, CI/CD, and analytical skills.
Java, C#, Python, JavaScript, .NET, Playwright, Selenium, Cypress, REST, GraphQL, Jenkins, GitHub Actions, Azure DevOps, Docker, AWS, Azure, Agile, Scrum, E-Verify, Microsoft Word, Microsoft Excel, Microsoft PowerPoint
2w
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Android Engineer
Costa Mesa or Seattle or Washington
$166k-$220k/yr OnsiteFull Time
Degree in CS/CE/Aerospace or related, experience building Android map-based and data-intensive UIs, proficiency with Jetpack Compose/Java/Kotlin and backend languages (C++, Rust, Go), networking (TCP/UDP/Multicast/HTTP/protobuf/gRPC), willingness to be on-call, and ability to travel up to 30%.
Jetpack Compose, XML, Java, Kotlin, C++, Rust, Golang, TCP, UDP, Multicast, HTTP, protobuf, gRPC, Android Tactical Assault Kit (ATAK), CMake, Cargo, gradle, NixOS, CircleCI, Docker, TypeScript, React, C++/Qt, C#/.NET, ArcGIS, Cesium, MapBox, TAK, Gitlab-CI, Python, Bash
1w
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Principal Software Engineer (Medical Device Software/C#, .NET, Windows)
Lake Forest, California, United States
$128k-$166k/yr OnsiteFull Time
5+ YOE5+ years developing Windows-based software using C#, .NET and related Microsoft technologies for regulated medical device environments; strong architecture, OOD, multi-threading, networking, and communication skills.
C#, .NET, WPF/XAML, MVVM, C++, Git, HL7, FHIR, DICOM, Protocol Buffers, TCP/IP
2w
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Senior Software Engineer
Carlsbad, California, United States
$130k-$180k/yr OnsiteFull Time
7+ YOEBS in Computer Science,7+ years software experience,expert C#/.NET for Windows,WPF desirable,motion systems and hardware interface experience,EM/vision knowledge and Python/C++ are a plus.
C#, .NET, WPF, C++, Python, MS Windows
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