16 backend net developer jobs at 11 companies in Fullerton, CA
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
22h
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Principal Software Engineer, Back End
Los Angeles or Nashville or New York City or Portland or United States
$180k-$205k/yr RemoteFull Time
10+ YOE10+ years back-end engineering experience with leadership in decomposing monoliths; deep .NET/C# and SQL Server expertise; cloud (Azure preferred) and container experience; experience with ORMs, API design, and data pipelines.
.NET, C#, SQL Server, Azure, AWS, GCP, Go, Node.js, Python, Postgres, Entity Framework, Dapper, Snowflake, BigQuery, Redshift, REST, GraphQL, gRPC, CI/CD
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
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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Sr. Software Engineer II – Back End - Access Control
Los Angeles, California, United States
$131k-$149k/yr HybridFull Time
6+ YOE6+ years software engineering; BS in Computer Science; distributed systems; REST APIs; C#/.NET Core; SQL and data modeling; Docker; IaC; cloud; high-scale systems; strong communication.
C#, NET Core, REST APIs, Docker, Terraform, Kubernetes, AWS, SQL Server, PostgreSQL, MySQL, Oracle, Elasticsearch, DynamoDB, Kafka, Git, 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
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
3w
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LoopNet - Senior Software Engineer
Irvine, California, United States
$124k-$187k/yr HybridFull Time
7+ YOEBachelor's degree,7+ years production C#/.NET development,AWS experience,unit and automated testing,API/backend design,mentoring experience,experience with AI coding tools (Claude Code or GitHub Copilot).
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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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
1mo
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Copy of Sr. Software Engineer - B2B
Los Angeles or Scottsdale or North America or Europe or Asia or Australia or New Zealand
$130k-$150k/yr HybridFull Time
4+ YOE4+ years building distributed backend systems; strong C#/.NET or Java skills; experience with concurrency, performance tuning, relational databases, cloud (AWS preferred); mentoring and bachelor’s degree or equivalent.
C#, .NET, .NET Core, Java, AWS, SQL Server, PostgreSQL, MySQL, Kafka, DynamoDB, Elasticsearch, Docker, Terraform
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
1mo
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Software Engineer Full Stack (Pricing Engine)
Irvine, California, United States
$90k-$134k/yr HybridFull Time
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
2mo
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Software Engineer, Lead
Long Beach, California, United States
$142k-$189k/yr OnsiteFull Time
5+ YOEDegree or equivalent in software/electrical field, 5+ years professional software development, proven team leadership, frontend/backend and database experience, SQL, NodeJS or C#/.Net, Linux proficiency.
HTML, CSS, TypeScript, Angular, React, Vue, SQL, REST APIs, NodeJS, C#/.Net, Linux, RabbitMQ, Docker, Kubernetes, Elasticsearch, Jira
2mo
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Software Engineer, Propulsion Simulation & Data Analysis
Hawthorne, California, United States
$125k-$175k/yr OnsiteFull Time
1+ YOEBachelor's in CS/engineering/STEM, 1+ year writing software and 1+ year physics-based simulation experience. Preferred: dynamical systems, lumped-parameter modeling, data pipelines, combustion/flow knowledge, full-stack and frontend (Angular/React), backend (Python, C#/.NET, C++, Java), control design, numerical analysis.
Angular, React, Python, C#/.NET, C++, Java, Unix-like operating systems
6d
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AI Integration Architect
Milwaukee or Irvine or Dallas or Austin or United States
$134k-$200k/yr OnsiteFull Time
7+ YOE7–10 years software engineering/architecture experience building LLM-powered or agentic AI applications; strong backend skills (Python/Java/.NET); API, security, and CI/CD experience; familiarity with agentic frameworks and AI observability.
LangChain, LlamaIndex, AutoGen, Python, Java, .NET, OAuth 2.0, JWT, Apigee, Kong, MCP, LiteLLM, Snowflake, Databricks, GCP, Docker, Kubernetes, Terraform, NVIDIA Device Plugins, CUDA, ROCm, vLLM, Triton
3mo
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Sr. Software Architect
Scottsdale or Los Angeles or Los Angeles
$149k-$162k/yr RemoteFull Time
5+ YOE5+ years of experience architecting and delivering software; strong backend and frontend knowledge; experience with cloud and modern architectures.
React, TypeScript, Kafka, Terraform, AWS, Kubernetes, .NET, Node.js, PostgreSQL, MySQL, Oracle, SQL Server, Elasticsearch, OpenSearch, DynamoDB, Redis
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