36 backend net developer jobs at 23 companies in California
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Senior Backend Engineer, Developer Platform (Horde)
New York City or California or Washington or Cary
$173k-$279k/yr OnsiteFull Time
6+ YOE6+ years building distributed systems for scheduling, queueing, storage, and failure recovery; experience with CI/CD/developer infrastructure; expert C#/.NET; cloud (AWS or Azure); strong backend architecture and communication skills.
C#, .NET, Unreal Engine, AWS, Azure, ASP.NET, gRPC, MongoDB, Redis
3w
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Backend Software Engineer
United States or Goleta
$123k-$170k/yr HybridFull Time
5+ YOE5+ years backend experience with C#/.NET and SQL; bachelor\u0002s degree in CS or related field; strong skills in concurrent processing, API and data pipeline design, and clear technical communication.
C#, .NET, SQL Server, SQL
1mo
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Senior Software Engineer, Backend
Calabasas, California, United States
$120k-$145k/yr OnsiteFull Time
5+ YOEBachelor's degree or 5+ years related experience; 5+ years backend development; strong .NET (C#) and/or Node.js, REST/GraphQL, event-driven architectures, SQL and caching (Redis), cloud (Azure) and CI/CD experience.
.NET (C#), Node.js, GraphQL, Azure Service Bus, Redis, SQL Server, PostgreSQL, Auth0, OIDC/OAuth2, JWT, Git/GitHub, Azure DevOps, GitHub Actions, Microsoft Office Suite, ARM templates, Bicep, Terraform, Dash0, Datadog, New Relic, Salesforce
1mo
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Software Engineer (Backend)
Lisbon or Portugal or Palo Alto or Charlotte or Belfast or Berlin
HybridFull Time
4+ YOE4+ years hands-on .NET (C#, ASP.NET, .NET Core) experience; experience with microservices, CI/CD, Kubernetes/Docker, Azure and SQL Server; strong coding, security, and performance focus; fluent English.
.NET, .NET Core, ASP.NET, C#, SQL Server, Azure, AWS, Google Cloud, Kubernetes, Docker, Jenkins, Git, CI/CD
4d
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Senior .NET/AWS Software Engineer
Mountain View, California, United States
$120k-$142k/yr HybridFull Time
5+ YOE5+ years software development with .NET Core, Python, AWS, and SQL Server; experience designing scalable backend services, APIs, CI/CD, and supporting production applications.
.NET Core, Python, AWS, SQL Server, CI/CD, GitHub Copilot
1mo
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Senior Software Engineer, Back-End (Payments)
United States or Santa Ana or San Francisco or Oakland or Berkeley or New Jersey or Texas or Florida or Shanghai or Hong Kong or Japan or Canada or Mexico or Germany or France
$141k-$229k/yr HybridFull Time
6+ YOE6+ years engineering experience, deep C#/.NET backend skills, frontend experience with React/Svelte/TypeScript, payments/gateway and distributed-systems experience, observability and security mindset.
Stripe, PayPal, C#, .NET, React, Svelte, TypeScript, PostgreSQL, DynamoDB, Kafka, Kubernetes, AWS, Datadog
4d
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Senior .NET/AWS Software Engineer
Mountain View, California, United States
$120k-$142k/yr HybridFull Time
5+ YOE5+ years software development with .NET Core, AWS, Python, and Microsoft SQL Server; experience with cloud and on-premises apps, backend services/APIs, troubleshooting, CI/CD and Agile collaboration.
Microsoft .NET Core, Python, AWS, Microsoft SQL Server, GitHub Copilot
3w
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Full-Stack .NET/Mobile Developer
San Diego, California, United States
$90k-$130k/yr OnsiteFull Time
5+ YOE5+ years full-stack .NET experience, 3+ years mobile (.NET MAUI/Xamarin), ASP.NET/C# backend, REST API and SSO experience, Azure and CI/CD familiarity, bachelor’s degree or equivalent preferred.
.NET MAUI, Xamarin, ASP.Net, MVC, C#, VB.Net, SSIS, Azure, Visual Studio, Git, Azure DevOps, GitHub Actions, SQL Server, OAuth 2.0, OpenID Connect, SAML
2mo
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Senior Software Engineer- Backend
Concord, California, United States
$130k-$150k/yr OnsiteFull Time
4+ YOE4+ years in software development; strong C#, .NET Core, Go; REST APIs; SQL/NoSQL; microservices; Docker/Kubernetes; AI-assisted tools; full-stack knowledge preferred.
C#, .NET Core, Go, SQL, NoSQL, REST, WebSocket, JSON, JavaScript, TypeScript, PostgreSQL, Redis, RabbitMQ, Kafka, Docker, Kubernetes, Git, CI/CD, XUnit, AI-assisted development tools
2mo
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Sr. Software Engineer II – Back End - Access Control
Los Angeles, California, United States
$146k-$165k/yr OnsiteFull Time
6+ YOE6+ years software engineering; BS in CS; C#/.NET Core; REST APIs in microservices; scalable systems; strong communication.
C#, .NET Core, REST APIs, Docker, Terraform, AWS, SQL (SQL Server, PostgreSQL, MySQL, Oracle), Kafka, Elasticsearch, DynamoDB, NoSQL
2mo
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Staff Software Engineer, Trade PMR
New York or Menlo Park
$166k-$195k/yr HybridFull Time
6+ YOE6+ years backend software development; expert .NET; AWS cloud; API integrations; mentoring; strong communication.
NET, AWS, APIs, GraphQL, React
2mo
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Software Engineer
Sacramento, California, United States
OnsiteFull Time
3+ YOEBackend software development experience; 3-8 years for software engineers; Python, Django, SQL, Postgres; AWS and DevOps practices; .NET experience for associate roles.
Python, Django, SQL, PostgreSQL, AWS, DevOps, .NET
2w
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Senior Software Engineer
San Diego, California, United States
$124k-$187k/yr HybridFull Time
Bachelor's degree required. Strong C#/.NET experience, hands-on AWS, experience using Claude for AI-assisted development, API and backend development skills, software design and mentorship experience.
C#, .NET, .NET Core, Claude, AWS, EC2, ECS, EKS, Lambda, S3, RDS, DynamoDB, CloudWatch, Databricks, Terraform, CloudFormation, CDK, Git
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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Principal Engineer - Catalog
California or United States or China or South America
$204k-$260k/yr RemoteFull Time
10+ YOE10+ years software engineering experience; deep architecture and cross-team technical leadership; AI-assisted development (Claude Code, Copilot) experience; backend expertise in C#/.NET, Go, Java, or Python; full-stack/React familiarity.
Claude Code, GitHub Copilot, Cursor, C#, .NET, Go, Java, Python, React, Microsoft Word, Microsoft Excel, Microsoft PowerPoint, Gmail, Google Drive, Google Docs, Google Sheets, Google Forms
3w
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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, Network Monitoring (Starlink)
Hawthorne, California, United States
$125k-$175k/yr OnsiteFull Time
1+ YOESTEM bachelor +1yr experience or 3+ yrs software development; frontend (Angular/React), backend (Python, C#, .NET, Go, Scala, Java); PostgreSQL/CockroachDB; Docker, Kubernetes; experience with real-time analytics, anomaly detection, and on-call rotations.
Angular, React, Python, C#, .NET, Go, Scala, Java, PostgreSQL, CockroachDB, Docker, Kubernetes
3mo
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Full Stack Engineer, Principal
Oakland, California, United States
$149k-$223k/yr HybridFull Time
10+ YOE10+ years of full stack development; BA/BS in Computer Science or equivalent; frontend framework proficiency (React, Vue, Angular); backend APIs using .NET, Java, Node.js, Python; SQL/NoSQL and REST; cloud-native apps (Azure preferred; AWS/GCP ok); Docker; IaC; CI/CD; AI-assisted coding tools; healthcare experience preferred.
React, Vue, Angular, JavaScript, TypeScript, .NET, Java, Node.js, Python, SQL, MS SQL Server, Oracle, NoSQL, REST, Azure, AWS, GCP, Docker, Ansible, Bicep, ARM, Terraform, GitHub, GitLab, Bitbucket, Git
3w
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Principal Engineer - Catalog
California, United States
$204k-$260k/yr RemoteFull Time
10+ YOE10+ years software engineering experience, expertise in large-scale architecture, AI-assisted development workflows (Claude Code, GitHub Copilot, Cursor), backend languages (C#/.NET, Go, Java, Python), API and data-model design, and cross-org technical leadership.
Claude Code, GitHub Copilot, Cursor, C#/.NET, Go, Java, Python, React, Microsoft Word, Microsoft Excel, Microsoft PowerPoint, Gmail, Google Drive, Google Docs, Google Sheets, Google Forms
2mo
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Engineer II, Cloud & Web Systems Software
Irvine, California, United States
$100k-$120k/yr OnsiteFull Time
2+ YOEBachelor’s degree in CS/Software Engineering or related field; 2-5 years in cloud/web/backend or distributed systems; strong programming with C#, .NET, Java, Python, JavaScript/TypeScript; cloud platforms (AWS/Azure/GCP); APIs, microservices, databases; CI/CD; Agile; good communication.
C#, NET, Java, Python, JavaScript, TypeScript, React, Angular, Node.js, AWS, Azure, Google Cloud Platform, SQL Server, PostgreSQL, MongoDB, CI/CD, Docker, Kubernetes
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