17 net core developer jobs at 11 companies in Washington

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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
3w
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Payments .NET Application Developer
Charlotte or Scottsdale or Dallas or Cleveland or California or Colorado or District of Columbia or Illinois or Maryland or Massachusetts or Minnesota or New York or New Jersey or Washington
$44-$54/hr HybridFull Time
Accenture
AccentureNYSE: ACN: Global provider of management consulting and technology services.
5+ YOE5+ years .NET development experience; proficient in C# and .NET core; relational DB experience (Oracle/MSSQL/PostgreSQL); Visual Studio and Git; strong OOP, design patterns, and communication skills; associate or bachelor degree.
.NET core, C#, Oracle, MSSQL, PostgreSQL, Microsoft Visual Studio, git, ASP.NET Core MVC, Web API, SQL Server, Entity Framework Core, ReactJS, VueJS, HTML, CSS, JavaScript, NUnit, xUnit, CockroachDB, Kafka
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.Net Full Stack Developer
Seattle, Washington, United States
$100k-$110k/yr OnsiteFull Time
Tata Consultancy Services
Tata Consultancy ServicesNational Stock Exchange of India: TCS: Global provider of IT services, consulting, and business solutions.
4+ YOE.NET/.NET Core,C#,RESTful API,modern JavaScript frontend (Angular/React/Vue),EF,LINQ,SQL databases,HTML/CSS/JavaScript,microservices,cloud (Azure/AWS),Git,CI/CD and DevOps practices.
Microsoft .NET, Microsoft .NET Core, C#, RESTful API, Angular, React, Vue, Entity Framework, LINQ, Microsoft SQL Server, MySQL, PostgreSQL, HTML, CSS, JavaScript, Azure, AWS, Git, CI/CD, DevOps
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Entegral Software Engineer - .Net / C#
Arizona or Florida or Illinois or Louisiana or Maryland or Michigan or Minnesota or Missouri or New Jersey or Nevada or New York or Ohio or Oregon or Pennsylvania or Tennessee or Texas or Virginia or Washington or Wisconsin
$108k-$135k/yr RemoteFull Time
Enterprise Mobility
Enterprise Mobility: Provider of vehicle rental and diverse mobility solutions.
3+ YOE3+ years application development (.NET/C#) or bootcamp+5yrs, experience with ASP.NET Core, SQL/NoSQL, cloud and container technologies, CI/CD, Agile; must be authorized to work in the U.S. and located in listed states.
SQL Server, MySQL, Mongo, ASP.NET Core, C#, .NET Core, .NET 5, Docker, Azure, AWS, Google, Kubernetes, CI/CD, DevOps, Java, Springboot, SQL, NoSQL
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Senior Software Engineer - Python/Agentic AI
Seattle, Washington, United States
$146k-$183k/yr HybridFull Time
BlackLine
BlackLineNASDAQ: BL: Provides cloud software to automate financial close and accounting.
3+ YOEMS in Mathematics/Computer Science or equivalent experience (BS+5 or MS+3). Strong software development skills (C#, .NET, .NET Core), 3+ years building web/SaaS/REST APIs, SQL expertise, distributed systems, test automation, and Agile experience.
Python, C#, .NET, .NET Core, HTML, JavaScript, JavaScript Frameworks, CSS, SQL, PostgreSQL, NoSQL, Docker, Kubernetes, Kafka, SQS, RabbitMQ, Azure, ASW, GCP
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Senior Software Engineer
Seattle or Washington
$146k-$183k/yr HybridFull Time
BlackLine
BlackLineNASDAQ: BL: Provides cloud software to automate financial close and accounting.
3+ YOEBS (plus 5 years) or MS (plus 3 years) in CS/Math or related; 3+ years building web/SaaS/REST APIs; experience with C#, .NET, .NET Core; strong SQL and distributed systems knowledge; Agile/Scrum experience preferred.
C#, .NET, .NET Core, HTML, JavaScript, JavaScript Frameworks, CSS, SQL, PostgreSQL, NoSQL, Docker, Kubernetes, Kafka, SQS, RabbitMQ, Azure, ASW, GCP, API gateway
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Web Developer
United States or New York City or Chicago or California or Colorado or Washington
RemoteFull Time
The IMA Group
The IMA Group: Provides medical evaluation and clinical research services to organizations.
Strong experience with C#, ASP.NET/.NET Framework/.NET Core, React or Python, SQL Server, HTML/CSS/JavaScript, Git; ability to work independently in a remote environment and support AI/cloud initiatives.
C#, ASP.NET, .NET Framework, .NET Core, React, Python, SQL Server, HTML, CSS, JavaScript, Claude Code, GitHub Copilot, Microsoft Azure, Git, API
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Senior Software Engineer
California or Texas or Washington or Florida or Tennessee or New York or United States
$155k-$165k/yr RemoteFull Time
GOVX
GOVX: Ecommerce marketplace providing exclusive discounts to military and first responders.
Proficiency in .NET Core, C#, T-SQL, React; experience designing distributed systems, leading/mentoring developers, delivering end-to-end projects, and strong analytical and communication skills.
.NET Core, C#, T-SQL, React, Visual Studio, VS Build Process, gRPC, ASP.NET Web API, Git, MS SQL Server, CosmosDB, Azure, Kubernetes
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Senior Software Engineer
California or Texas or Washington or Florida or Tennessee or New York or United States
$155k-$165k/yr RemoteFull Time
GOVX
GOVX: Ecommerce marketplace providing exclusive discounts to military and first responders.
Lead/mentor developers, deliver end-to-end projects, strong .NET Core, C#, T-SQL, SPA/React experience, distributed systems design, CI/CD, Azure and container experience.
.NET Core, C#, T-SQL, React, Visual Studio, gRPC, ASP.NET Web API, Git, MS SQL Server, CosmosDB, Azure, Kubernetes, Continuous Integration/ Continuous Deployment
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Senior Software Developer
Seattle, Washington, United States
$52-$78/hr OnsiteFull Time
Seattle Housing Authority
Seattle Housing Authority: Provides affordable housing and rental assistance to Seattle residents.
8+ YOEBachelor's in computer science or equivalent experience; 8+ years web development experience; 3+ years with .NET/.NET Core; SQL/web development certifications desirable; public or housing sector experience preferred.
.NET Framework, .NET Core, T-SQL, SQL Server
2w
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Senior Software Engineer
Connecticut or West Virginia or South Carolina or Pennsylvania or New Hampshire or Hawaii or California or Michigan or Kentucky or Arizona or New Mexico or Nevada or Florida or Alaska or Washington or Oregon or Texas or Alabama or Mississippi or Tennessee or Illinois or Wisconsin or Louisiana or Arkansas or Missouri or Iowa or Minnesota or Oklahoma or Kansas or Nebraska or South Dakota or North Dakota or Colorado or Wyoming or Idaho or Montana or Utah or Vermont or North Carolina or Massachusetts or Georgia or Rhode Island or New York or Maryland or Delaware or Virginia or Ohio or New Jersey or Maine
$110k-$140k/yr RemoteFull Time
Worksoft: Automation platform for enterprise business process testing and discovery.
10+ YOE10+ years web development experience (C#, .NET, ASP.NET Core) and production AI/ML experience (LLMs, PyTorch/TensorFlow, LangChain, etc.); Bachelor’s in CS/Engineering or 15+ years experience; strong problem solving and customer-facing troubleshooting skills.
OpenAI, Azure OpenAI, Anthropic Claude, Gemini, PyTorch, TensorFlow, scikit-learn, ML.Net, LangChain, Semantic Kernel, RAG, vector databases, LLMs, ASP.Net Core, Web APIs, REST, JWT, OAuth, Azure AD/Entra ID, Blazor, Angular, MS Sql Server, EF Core, WinForms, WPF, .Net MAUI, Service Bus, Kafka, MSBuild, Git
2d
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Web Application Developer
Keyport or United States
$90k-$120k/yr RemoteFull Time
Saalex
Saalex: Provides engineering, IT, and mission support for defense agencies.
3+ YOE3+ years building and supporting web applications; proficiency with C#, SQL, .NET Core, JavaScript; experience with APIs, relational databases, low-code platforms; strong troubleshooting and communication skills.
C#, SQL, .NET Core, JavaScript, Microsoft Power Platform, Power Apps, Power Automate, Mendix, OutSystems, Appian, Git, Azure DevOps
2w
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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
6d
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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
2w
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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
1mo
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Senior Software Engineer
Seattle or Washington
$156k-$196k/yr HybridFull Time
BlackLine
BlackLineNASDAQ: BL: Provides cloud software to automate financial close and accounting.
7+ YOEMaster's degree required; 7+ years test automation and Web/Mobile/SaaS/API testing experience; strong C#/.NET Core and NUnit/XUnit/MSTest skills; Appium/Selendroid for mobile automation; SQL and cloud (Google Cloud, AWS, Azure) experience; FinTech background preferred.
C#, Microsoft .NET Core, NUnit, XUnit, MSTest, Appium, Selendroid, Google Cloud, AWS, Azure, SQL, Mesos, Kubernetes, Nomad, Kafka, SQS, RabbitMQ, HTML, JavaScript, CSS, Microsoft Dynamics 365, Oracle, NetSuite, Intacct, Continuous Integration (CI)
1mo
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Staff I Software Engineer
Seattle or Washington
$193k-$242k/yr HybridFull Time
BlackLine
BlackLineNASDAQ: BL: Provides cloud software to automate financial close and accounting.
10+ YOEMaster's in Math/CS or related; 10+ years in web/SaaS/RESTful API testing; 7+ years test automation and C# (.NET Core) development; 5+ years technical leadership for cloud migration; experience with Google Cloud, AWS, Azure, CI, SQL, XPath, HTML/CSS/JavaScript, JSON/XML; Agile (SCRUM).
C#, Microsoft .NET Core, NUnit, xUnit, MSTest, Google Cloud, AWS, Azure, XPath, HTML, CSS, JavaScript, JSON, XML, SQL, Continuous Integration (CI), RESTful API, SCRUM