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83 senior net developer jobs at 48 companies in Seattle, WA

20h
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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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22h
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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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1mo
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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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1mo
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Senior Applications Developer
Seattle, Washington, United States
HybridFull Time
Marsh McLennan
Marsh McLennanNYSE: MRSH: Global professional services firm providing risk, strategy, and people solutions.
10+ YOE10+ years software development experience; expert C# (.NET) and Visual Studio; strong knowledge of threading, async/await, LINQ, REST, Azure; SQL and Protobuf experience; Agile teamwork and strong communication.
C#, .NET, Visual Studio 2022/2023, Azure, SQL, Protobuf, Angular, WebAssembly, HTML, CSS, TypeScript, JavaScript, jQuery, Python, Kubernetes, C++, LLMs
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3w
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Senior Engineer - Durable Compliance
Renton or Palo Alto or Richardson or Bethesda
$75k-$215k/yr HybridFull Time
GEICO
GEICO: Provides vehicle and property insurance services to consumers.
3+ YOE4+ years software development experience with Duck Creek and 3+ years with .NET/C#; experience in architecture, cloud, DevOps, monitoring, security, and microservices; bachelor's degree or equivalent.
Duck Creek, C#, .NET, Visual Studio, SQL Server, ASP.NET, MVC, Web API, Java, Python, Go, JavaScript, TypeScript, HTML-5, Angular, React, XML, JSON, RESTful Web Services, Event Driven Architectures, SQL, NoSQL, Docker, Kubernetes, Azure, Azure DevOps, AWS, GCP, ManuScript, CBO, Author
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1mo
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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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1mo
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Senior C# Developer (Data Management)
Warsaw or Seattle
HybridFull Time
Veeam
Veeam: Data resilience and security for hybrid cloud environments
5+ YOE5+ years commercial software development experience; proficiency in C# and .NET, software architecture, data structures and algorithms; problem-solving mindset and English proficiency.
C#, .NET, Microsoft Azure, Microsoft Entra ID, Veeam Data Command Center, Veeam Service Provider Console, Veeam VDC Azure/Entra ID services
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3mo
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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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2mo
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Senior Salesforce Developer
Jacksonville or Dallas or Cincinnati or Los Angeles or Sacramento or Richmond or Minneapolis or Boston or Kansas City or Chicago or Tampa or Washington or San Antonio or Houston or Colorado Springs or Nashville or San Diego or Pittsburgh or Tacoma or New York or Phoenix or Miami or Fayetteville
HybridFull Time
Wounded Warrior Project
Wounded Warrior Project: Provides support services and mental health programs for veterans.
7+ YOE7+ years designing and implementing Salesforce solutions; 5+ years with Apex, LWC, Visualforce and integrations; Salesforce Platform Developer II required; Bachelor’s in CS/IS/software engineering or equivalent.
Salesforce CRM (Sales and Service Cloud), Force.com, Visualforce, Apex, Lightning Web Components, Cascading Style Sheets (CSS), HTML, Java, .NET, Data Loader, AppExchange, React, React Native, SQL
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1mo
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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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1mo
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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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3w
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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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2d
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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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1mo
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Senior Engineer AppDev
Chennai or Coimbatore or Bengaluru or Hyderabad
OnsiteFull Time
Presidio
Presidio: Global provider of cloud, cybersecurity, and digital infrastructure solutions.
Hands-on web development with Java, .Net, Python, Go, C#, or JavaScript; experience with Angular/React/NodeJS, microservices, Docker, relational and NoSQL databases, and cloud platforms (AWS/Azure/Google).
Java, .Net, Python, Go, C#, JavaScript, Angular, React, NodeJS, Docker, Postgres, MySQL, Oracle, MongoDB, Amazon DynamoDB, Cassandra, Amazon Web Services, Microsoft Azure, Google
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1mo
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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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2mo
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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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2h
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Senior Technical Lead - .Net, Azure, C#
King County, Washington, United States
OnsiteFull Time
HCLTech
HCLTechNational Stock Exchange of India: HCLTECH: Global provider of information technology services and software consulting.
Bachelor's degree in computer science or equivalent experience; enterprise application support, SQL/database troubleshooting, full-stack development, Azure, Agile, and technical leadership experience required.
.NET, Azure, C#, JavaScript, TypeScript, React, Microsoft Dynamics 365, Prompt AI, CoPilot, Azure DevOps, Power Platform, REST APIs, CI/CD, SQL, S360, SFI, Service Tree, ICM
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6d
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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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1mo
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Staff Software Engineer- Eng
Seattle, Washington, United States
$130k-$214k/yr HybridFull Time
UKG
UKG: Provider of workforce management and human capital management software.
7+ YOEBachelor's degree in CS/Engineering,7+ years software development,expertise in C#, .NET, Python, Java or JavaScript,cloud experience (Azure/AWS/GCP),GitHub,telemetry/observability,leadership and communication skills.
C#, .NET, Python, Java, JavaScript, Azure, AWS, GCP, GitHub, JUnit, Selenium, Claude Code
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1mo
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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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