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55 senior net software engineer jobs at 32 companies in Seattle, WA

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Senior .NET Developer
Olympia, Washington, United States
$96k-$126k/yr HybridFull Time
Washington State Department of Ecology
Washington State Department of Ecology: Provides environmental regulation and conservation services for Washington state.
8+ YOEBachelor’s degree in IT, computer science, or related field plus 8 years in complex IT, including 6 years developing applications with C#, .NET, Entity Framework, or similar tools.
C#, .NET, MS Entity Framework, Blazor, Angular, React/Vite, Git, Azure DevOps, GitHub Actions, SQL, GitHub Copilot, Claude Code, Microsoft 365, Microsoft Teams, Microsoft Outlook, Microsoft Word, Microsoft OneNote, Microsoft PowerPoint
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Senior .Net Developer
Olympia, Washington, United States
$96k-$126k/yr HybridFull Time
Washington State Administrative Office of the Courts
Washington State Administrative Office of the Courts: Provides administrative and technological support to Washington State's judiciary.
8+ YOEBachelor's degree in IT, Computer Science, or related field, 8 years in complex IT, including 6 years developing applications with C#, .NET, Entity Framework, or similar tools.
C#, .NET, Microsoft Entity Framework, Blazor, Angular, React, Vite, Git, Azure DevOps, GitHub Actions, SQL, GitHub Copilot, Claude Code, Microsoft Teams, Microsoft Outlook, Microsoft Word, Microsoft OneNote, Microsoft PowerPoint, Microsoft 365
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Senior Software Engineer
Redmond or New York
$120k-$235k/yr HybridFull Time
Microsoft
MicrosoftNASDAQ: MSFT: Develops software, services, devices, and cloud computing solutions.
4+ YOEBachelor's in CS or related (or equivalent), 4+ years engineering experience; proficiency in C/C++/C#/Java/JavaScript/Python; experience with Windows/.NET development, CI/CD, telemetry, and performance optimization.
C, C++, C#, Java, JavaScript, Python, .NET, Win32 API, WinUI3, UWP, CI/CD
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(USA) Senior, Software Engineer
Seattle or Denver
$99k-$216k/yr OnsiteFull Time
Walmart
WalmartNYSE: WMT: Multinational retail operating discount stores and supermarkets.
3+ YOE3+ years software engineering experience, expertise in .NET/C#, backend services, AWS and Terraform, containerization, databases, excellent communication and analytical skills, BS in CS or equivalent.
.NET, C#, AWS, Terraform, Docker, Postgres, Redis, MySQL, Mongo, Angular
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(USA) Senior, Software Engineer
Seattle or Denver
$108k-$216k/yr OnsiteFull Time
Walmart
WalmartNYSE: WMT: Operates a chain of hypermarkets, discount stores, and grocery stores.
3+ YOEBachelor's degree in a relevant computing field and 3 years' software engineering experience, or 5 years' experience; expertise in .NET and C#, AWS, Terraform, containers, databases, and distributed systems.
.NET, C#, AWS, Terraform, Docker, PostgreSQL, Redis, MySQL, MongoDB, Angular, Web Content Accessibility Guidelines (WCAG)
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.Net/React Senior Developer
Seattle, Washington, United States
$100k-$120k/yr OnsiteFull Time
Tata Consultancy Services
Tata Consultancy ServicesNational Stock Exchange of India: TCS: Global provider of IT services, consulting, and business solutions.
5+ YOE5+ years experience; proficiency in .NET/.NET Core,C#,React,SQL; experience with application architecture, microservices,Azure and CI/CD; bachelor's in computer science.
.NET Core, .NET, C#, HTML5, CSS3, React, JavaScript, SQL, PL SQL, SQL Server, Oracle, Microsoft Azure, Azure Storage, CI/CD
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Senior Software Engineer III
Richland or Seattle
$133k-$210k/yr HybridFull Time
Pacific Northwest National Laboratory
Pacific Northwest National Laboratory: Department of Energy research laboratory focused on scientific innovation.
1+ YOERequires hands-on Python experience and software engineering expertise with scalable system design, cloud-native deployments, ETL/data pipelines, distributed processing, and security clearance eligibility.
Python, .NET, C#, Go, C++, Rust, Git, Copilot, Claude, Cursor, AWS, Azure, GCP, Docker, Kubernetes, REST, GraphQL, gRPC, SQL, NoSQL, Spark, Kafka, Flink, Ray, LangChain, LlamaIndex, AWS Glue, Azure Data Factory, Step Functions
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Senior Software Developer
Auburn, Washington, United States
$8k-$8k/mo RemoteFull Time
U-Haul
U-HaulNYSE: UHAL: Provides moving truck rentals and self-storage units to consumers.
2+ YOEStrong knowledge of C#, .NET, MVC, SQL, and JavaScript; strong communication skills; bachelor's degree in computer science, engineering, or technology, or 2–3 years of software development experience.
C#, .NET Framework 4.7.2, .NET Core, MVC, SQL, JavaScript, Kafka, Redis, Agile, Scrum, QA, Ops, AI
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Senior Software Engineer (Backend)
Seattle, Washington, United States
$140k-$200k/yr RemoteFull Time
Aerostrat
AerostratNYSE: AIR: Builds maintenance planning software for the aviation industry.
5+ YOE5+ years C#/.NET and SQL experience, 3+ years building REST APIs and cloud projects on Azure or AWS, experience designing technical solutions for engineers, strong communication and problem-solving skills.
C#, .NET, SQL Server, SQL, REST APIs, microservices, Azure, AWS, Slack
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Senior Software Engineer
Seattle, Washington, United States
$158k-$233k/yr HybridFull Time
DocuSign
DocuSignNASDAQ: DOCU: Provider of e-signature and intelligent agreement management software.
8+ YOE8+ years backend engineering experience, B.S. in CS or similar, 3+ years building cloud-native microservices, experience with SQL/NoSQL, service reliability, and strong communication and design skills.
Redis, Cassandra, Elasticsearch, Microsoft Azure, Microsoft Azure App Services, Microsoft Azure Kubernetes Service (AKS), Microsoft Azure Blob Storage, Microsoft Azure SQL Database, C#, .NET, ASP.NET, PostgreSQL, Cosmos DB, GraphQL, GRPC, REST
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Principal Software Engineer- Eng
Seattle, Washington, United States
$164k-$271k/yr HybridFull Time
UKG
UKG: Provider of workforce management and human capital management software.
10+ YOE10+ years software engineering experience, 3+ years at senior/staff/principal level; deep distributed systems and .NET Core experience; EM/AI-assisted engineering familiarity; strong problem-solving and cross-team influence.
.NET Core, Angular
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Senior Software Engineer, Backend
Bellevue, Washington, United States
$160k-$210k/yr HybridFull Time
Cognitiv
Cognitiv: Deep learning platform for predictive advertising and media buying.
Senior backend engineer experienced with .NET Core (or similar), AWS, building partner integrations, scaling distributed systems, strong ownership, communication, testing focus, and operational excellence.
.NET Core, Java, Kotlin, AWS, RDS, ClickHouse, Datadog, CI/CD, ContextGPT
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Senior Software Engineer
Seattle, Washington, United States
$158k-$233k/yr HybridFull Time
DocuSign
DocuSignNASDAQ: DOCU: Provides electronic signature and agreement management software solutions.
8+ YOEBS in CS, 8+ years backend OOP experience, 3+ years building cloud-native microservices, SQL and NoSQL experience, service reliability knowledge; Microsoft/Azure and full-stack/API experience preferred.
C#, Java, C++, PostgreSQL, Azure SQL Database, Cosmos DB, Microsoft Azure, AWS, GraphQL, gRPC, REST, Redis, Cassandra, Elasticsearch, Azure App Services, Azure Kubernetes Service (AKS), Azure Blob Storage, SQL/No-SQL Databases, .NET, ASP.NET
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Senior Software Development Engineer
Seattle, Washington, United States
$112k-$156k/yr HybridFull Time
MCG Health
MCG Health: Provides evidence-based clinical guidelines and software for healthcare.
5+ YOE5+ years software development experience building and operating Azure cloud-native distributed systems; strong C#, .Net Framework, SQL Server, REST APIs, microservices, CI/CD, IaC, security, incident response, and AI-assisted tooling experience.
Azure, C#, .Net Framework, SQL Server, REST APIs, Microservices, CI/CD, infrastructure-as-code, GitHub Copilot, Claude, Azure Service Bus, Kafka
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Engineer Senior - ST
Seattle, Washington, United States
$173k-$216k/yr HybridFull Time
Starbucks
StarbucksNASDAQ: SBUX: Operates a global chain of coffeehouses and roastery reserves.
5+ YOEBachelor's in CS/Engineering/IT plus 5+ years post-bachelor software engineering experience; 5 years with C#/.NET, integrations (SOA/Microservices), distributed systems, CI/CD, 24x7 production, RDBMS/NoSQL; 4 years cloud (AWS or Microsoft Azure).
C#, .NET framework, SOA, Microservices, SDLC, DevOps, Test-driven development, RDBMS, NoSQL, Windows, AWS, Microsoft Azure, Continuous Integration, Continuous Deployment
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Senior Full Stack Software Engineer
Bellevue, Washington, United States
$212k-$275k/yr RemoteFull Time
The Trade Desk
The Trade DeskNASDAQ: TTD: Cloud-based programmatic advertising platform for data-driven media buying.
8+ YOEBachelor's degree and 8+ years coding experience; 5+ years full-stack design and technical communication; experience with C#, Python, React, SQL, CI/CD, and software development lifecycle.
C#, TypeScript, React, .NET, REST, GraphQL, SQL, CI/CD, Python
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Software Development Engineer III - Corporate Services
Mountlake Terrace or Alaska or Arizona or Arkansas or California or Colorado or Florida or Georgia or Idaho or Iowa or Kansas or Kentucky or Maine or Michigan or Minnesota or Missouri or Montana or Nevada or New Hampshire or New Mexico or North Carolina or Oklahoma or Oregon or South Carolina or South Dakota or Tennessee or Texas or Utah or Washington or Wisconsin
$98k-$167k/yr RemoteFull Time
Premera Blue Cross
Premera Blue Cross: Provides health insurance and medical benefit plans for members.
5+ YOEBachelor's in CS or equivalent,5+ years software development,experience with Azure,C#,Java,.NET,MS SQL Server,Power Platform,automated testing,Agile;strong technical and analytical skills.
Azure, C#, Java, .NET, Microsoft Visual Studio, MS SQL Server, Power Platform
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Senior Software Engineer-Tech Ex AI Assets Foundry Team
Chicago or Dallas or Los Angeles or Minneapolis or New York City or San Francisco or Seattle or Washington
$120k-$162k/yr OnsiteFull Time
West Monroe
West Monroe: Business and technology consultancy specializing in digital transformation.
5+ YOE5+ years full-stack development experience, cloud and CI/CD skills, experience integrating Generative AI, strong software design and communication, bachelor’s degree preferred, mentoring experience.
Node.js, Python, .NET, React, TypeScript, JavaScript, HTML5, CSS3, PostgreSQL, MongoDB, SQL Server, Microsoft Azure, Microsoft Azure OpenAI, Databricks Machine Learning, Amazon Web Services (AWS), Git, Microsoft Azure DevOps, Terraform, Docker, npm, NuGet, Jest
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Senior Software Engineer , Full Stack ( Seattle / Provo Hybrid )
Provo or Seattle or Chicago or Boston or South Bend
$100k-$138k/yr HybridFull Time
Press Ganey
Press Ganey: Provides patient experience measurement and healthcare performance analytics.
5+ YOERequires a bachelor's degree or comparable experience, 5+ years in Angular and React mobile-responsive development, .NET Core, SQL Server, APIs, testing, agile methods, and technical leadership.
C#, .NET Core, Angular, React, JavaScript, CSS, JSON, Docker, Kubernetes, CI/CD, GitLab, Microsoft SQL Server, SQL
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Software Engineer, Full-Stack
Bellevue or San Jose
$180k-$240k/yr OnsiteFull Time
Rivet Industries
Rivet Industries: Building integrated task systems for frontline industrial and defense operators.
5+ YOE5+ years building full-stack web applications; strong C#, Microsoft .NET/ASP.NET Core experience (or comparable stack), SQL fluency, Docker and Linux deployment experience, BS in CS or equivalent.
C#, Microsoft .NET, Microsoft ASP.NET Core, SQL, Docker, Linux
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