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62 net core developer jobs at 39 companies in Leesburg, VA

2mo
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.NET Developer
Arlington, Virginia, United States
$104k-$218k/yr OnsiteFull Time
CACI International
CACI InternationalNYSE: CACI: Provides information technology and engineering services for government agencies.
5+ YOE5–7 years software development experience, active Secret clearance, Bachelor's in CS/related (or equivalent), proficiency in C#, .NET/ASP.NET/.NET Core, React, Razor, Microsoft SQL Server, REST, and Git; strong troubleshooting and communication skills.
C#, .NET, ASP.NET, .NET Core, React, Razor Pages, Razor Views, Microsoft SQL Server, RESTful API, Git, Microsoft Azure DevOps, Entity Framework, TypeScript
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1mo
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Senior Engineer – .NET
Bethesda, Maryland, United States
$151k-$184k/yr HybridFull Time
GEICO
GEICO: Provides vehicle and property insurance services to consumers.
4+ YOEBachelor's in CS or related, 4+ years .NET software development experience, 2 years architecture/design and DevOps/Azure experience, proficiency with Azure DevOps, cloud engineering, .NET Core/ASP.NET, Angular/Express; occasional on-call and background check.
Scrum, Kanban, SAFe, .NET, .NET Core, ASP.NET, Angular, Express, Azure DevOps, Azure Network, DevOps
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3mo
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Senior .NET Developer
Vienna, Virginia, United States
HybridFull Time
Prime Source Technologies
Prime Source Technologies: Provides IT solutions, software development, and systems integration services.
10+ YOE10+ years of software development experience with 3+ years in .NET Core; expert in C#, ASP.NET Core, EF Core, and LINQ; cloud experience (Azure); microservices and containerization; REST/GraphQL APIs; CI/CD; unit tests; secure coding.
C#, ASP.NET Core, NET Core, Entity Framework Core, LINQ, Docker, Kubernetes, Azure, Azure DevOps, GitHub Actions, SQL Server, T-SQL, Azure Service Bus, RabbitMQ, Kafka, Blazor, Razor Pages, GraphQL, REST, OIDC, Identity Server, Azure AD
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4d
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.Net Applications Developer
Washington, District of Columbia, United States
HybridFull Time
AVER
AVER: Provides data analytics and IT services for federal agencies
5+ YOE5+ years .NET application development experience with C#, .NET Core/.NET 6+, Azure DevOps/GitHub Actions, EF Core, SQL/Oracle, REST APIs, and secure authentication; bachelor’s degree or equivalent experience.
Microsoft C# (.Net CORE), Microsoft .NET 6, Microsoft .NET Framework 4.8, Microsoft Azure DevOps, GitHub Actions, Azure App Services, Azure Functions, Azure API Management, Azure Storage, Azure Key Vault, Entity Framework Core (EF Core), SQL Server, Oracle, MVC, MVVM, jQuery, AJAX, Telerik Kendo UI, RESTful Web Services, Windows Services, ASP.NET Core, Entra ID (formerly Azure Active Directory), SAML, OAuth 2.0, OpenID Connect, JSON Web Tokens (JWT), Microsoft Visual Studio 2022, Azure Logic Apps, Event Grid, Cosmos DB, GraphQL
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4d
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.NET Developer, Mid-level
Washington, District of Columbia, United States
HybridFull Time
Andworx
Andworx: Delivers digital transformation and IT solutions for federal agencies.
3+ YOE3+ years developing enterprise .NET applications; experience with ASP.NET,.NET Core,C#,MVC,Entity Framework,REST/SOAP integrations,Oracle,Agile; US citizenship and ability to obtain Position of Trust.
ASP.NET, .NET Core, C#, MVC, MVVM, Entity Framework, Azure DevOps, REST, SOAP, JSON, XML, Oracle
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5d
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Senior .Net Developer #1824528
Alexandria, Virginia, United States
$135k-$160k/yr OnsiteFull Time
Network Designs, Inc.
Network Designs, Inc.: Provides IT, network, and cybersecurity solutions to government agencies.
10+ YOEU.S. citizen able to obtain Public Trust, 10+ years experience, advanced C#, .NET, ASP.NET Core, Angular, Microsoft SQL Server, RESTful API and web application development.
C#, .NET Core, .NET 6, ASP.NET Core, Angular, TypeScript, HTML, CSS, JavaScript, Entity Framework, Entity Framework Core, Microsoft SQL Server, Git, Microsoft Azure, Microsoft Azure App Services, Azure Functions, Azure SQL, Microsoft Azure DevOps, GitHub, Docker, Kubernetes, xUnit, NUnit, Jasmine, Karma, Cypress, Jenkins, GitHub Actions
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1d
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Senior .NET Developer
Rockville or United States
HybridContract
eTelligent Group
eTelligent Group: Providing IT modernization and cybersecurity solutions for federal government agencies.
US citizen required. Proficient in .NET Core/.NET 8, C#, Azure services, API security, Microsoft Entra ID/B2C, Azure OpenAI/Azure AI Foundry, GitHub Copilot, CI/CD, containers, SQL/Cosmos DB, and modern UI frameworks.
.NET Core, .NET 8, C#, Azure, App Services, Functions, API Management, Service Bus, Azure SQL, Azure OpenAI, Azure AI Foundry, GitHub Copilot, GitHub, Azure DevOps, CI/CD, Cosmos DB, Blazor, React, Angular, Microsoft Entra ID/B2C
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3d
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Senior .Net Developer with Azure/Angular
Washington, District of Columbia, United States
$68k-$140k/yr OnsiteFull Time
Cognizant
CognizantNasdaq: CTSH: Provides global information technology and business process outsourcing services.
10+ YOE10+ years .NET development experience with .NET Core, C#/VB.NET, SQL Server, Azure platform and Angular; strong DevOps, microservices, containerization, security and performance tuning skills.
.NET Core, C#, VB.NET, ADO.Net, Entity Framework, Microsoft SQL Server, SQL Server Reporting Services (SSRS), Docker, Microservices, Azure Functions, FunctionApp, Web Jobs, Storage Account, Key Vault, App Insights, Cognitive Service, Service Bus, Azure AD, Azure BOT Service, Azure Open AI, Data Factory, Azure Event Grid, Azure Event Hubs, Angular 9+, HTML5, CSS 3, Bootstrap, Material, JavaScript, TypeScript, RXJS, HighCharts, AG Grids, GIT, NPM, Angular cli
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2d
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Senior .NET Developer – Azure & AI Solutions
Rockville, Maryland, United States
OnsiteFull Time
ASSYST
ASSYST: An IT firm that provides digital transformation, DevSecOps, cybersecurity, and AI integration services for government agencies.
Expert C#, ASP.NET Core, .NET 8/.NET Core, Azure and AI solution experience including Azure OpenAI, RAG, AI Agents, CI/CD, and modernizing legacy .NET apps.
.NET 8, .NET Core, C#, ASP.NET Core, Microsoft Azure, Azure App Services, Azure Functions, API Management, Service Bus, Azure SQL, Azure OpenAI, Azure AI Foundry, AI Agents, Retrieval-Augmented Generation (RAG), GitHub Copilot for Developers, Microsoft Entra ID/B2C, GitHub, Azure DevOps, SQL, Cosmos DB, Blazor, React, Angular
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1mo
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.NET Software Developer, Junior
Arlington, Virginia, United States
$90k-$110k/yr OnsiteFull Time
TIAG
TIAG: Technology and management solutions provider for government and industry.
2+ YOEActive Secret clearance, CompTIA Security+ and CE certifications, 2+ years developing with Microsoft .NET (C#, ASP.NET, .NET Core), experience with HTML/CSS/JavaScript and relational databases, bachelor's degree or equivalent.
C#, ASP.NET, .NET Core, HTML, CSS, JavaScript, Microsoft SQL Server, Oracle, PostgreSQL, Azure DevOps, Git, Jira
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3d
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Sr. Backend Engineer (.NET Core)
Washington or Falls Church
RemoteFull Time
Data Society Group
Data Society Group: Provides data science training and AI solutions for organizations.
6+ YOE6+ years backend development with 4+ years .NET Core/C#, experience leading offshore teams, Azure SQL, Azure Service Bus, Azure API Management, CI/CD with Azure DevOps and Veracode, API and microservices design.
.NET Core, C#, Azure SQL, Azure Service Bus, Azure API Management (APIM), Azure DevOps, Veracode, React, Oracle Fusion Cloud, Claude Code, GitHub Copilot, Cursor
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2w
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.NET Services Engineer
McLean or United States
RemoteFull Time
Aretum
Aretum: Provides technology-enabled mission support services for federal government agencies.
8+ YOE8+ years software development experience with ASP.NET/Core and C#; experience with GraphQL, PostgreSQL, EFCore, Azure, Kubernetes, Azure DevOps, and unit testing; U.S. citizenship and Public Trust eligibility required.
C#, .NET, ASP.NET Core, Entity Framework Core (EFCore), PostgreSQL, GraphQL, Azure, AKS, Azure Pipelines, Azure Key Vault, Kubernetes, Helm, Open Telemetry, Azure DevOps (ADO), Git
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1d
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Senior .Net Application Developer
Arlington or Merrifield
OnsiteFull Time
ASRC Federal
ASRC Federal: Provides engineering and IT services to federal government agencies.
10+ YOERequire U.S. citizenship and active Secret clearance; 10+ years software development including 8+ years ASP.NET C# MVC, 5+ years .NET Core, Agile experience, EMR not mentioned; strong SQL, XML, and frontend skills.
ASP.NET, C#, LINQ, MVC, Entity Framework, Unity, Visual Studio 2010, Visual Studio 2017, Team Foundation Server, ReSharper, SharePoint, NHibernate, jQuery, JavaScript, AJAX, HTML, CSS, Oracle, SQL Server, T4 templates, Classic ASP, Concorde, XML
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4w
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Senior .NET Software Developer
Austin or Alexandria or United States
$110k-$140k/yr RemoteFull Time
Advanced Solutions International
Advanced Solutions International: Cloud software for association and non-profit management.
8+ YOE8+ years building web applications; bachelor’s degree in CS or equivalent experience; strong C#, .NET Core, .NET MVC, Entity Framework, Microsoft SQL/Azure SQL, Visual Studio; experience with performance testing and Azure observability.
C#, .NET Core, .NET MVC, Entity Framework Core, Microsoft SQL Server, Azure SQL, Visual Studio, Java 8, Spring, Hibernate, TypeScript, NodeJS, Postgres, MySQL, JMeter, WAPT, Azure Application Insights, Azure App Service, Azure Containers, .NET Aspire, Microsoft Web Forms, Web API, Microsoft .NET Framework, AngularJS, SAFe
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11h
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Senior Full Stack .Net Developer
Flexwork or Virginia
RemoteFull Time
SAIC
SAICNASDAQ: SAIC: Provides government and defense clients with technology and engineering services.
10+ YOEBachelor's in computer science, 10+ years software development, US citizenship for Public Trust, expertise in .NET Core, Angular, Razor, Azure, REST/SOAP, MS SQL, OAuth2/OpenID Connect/JWT, Azure DevOps, and scripting (bash, python, PowerShell).
Microsoft .NET, .Net Core, Angular, Razor, OAuth 2.0, OpenID Connect, JWT, REST, SOAP, XML, JSON, Azure Services, MS SQL Server, Azure DevOps, GIT, Visual Studio, bash, python, PowerShell, CI/CD
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3d
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Sr. NET Developer /AI Developer – Rockville, MD
Rockville, Maryland, United States
OnsiteContract
Creative Information Technology
Creative Information Technology: Provides IT solutions and software for government and healthcare sectors.
.NET Core/.NET 8 and C# expertise, strong Azure experience (App Services, Functions, Service Bus, Azure SQL), Azure OpenAI/AI Foundry experience, GitHub/GitHub Copilot or Azure DevOps, CI/CD, containers, SQL/Cosmos DB, modern UI frameworks, security and authentication.
.NET Core, .NET 8, C#, Microsoft Azure, App Services, Functions, API Management, Service Bus, Azure SQL, Azure OpenAI, AI Foundry, GitHub Copilot for Developers, ASP.NET Core, Microsoft Entra ID, B2C, GitHub, Azure DevOps, CI/CD, Blazor, React, Angular, Cosmos DB, SQL
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2d
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Software Engineer (.NET)
Sterling, Virginia, United States
$115k-$150k/yr OnsiteFull Time
Strongbridge
Strongbridge: Provides IT modernization and data strategy for federal agencies.
4+ YOEBachelor's in CS or related,4+ years software development experience,proficiency in C#,C++ or Java,.NET/ASP.NET Core,ASP.NET MVC,Angular,SQL Server,EMR with strong communication and analytical skills,Public Trust eligibility.
C#, C++, Java, .NET Framework, ASP.NET Core, ASP.NET MVC, Angular, Bootstrap, Microsoft SQL Server, SQL Server Management Studio (SSMS), HTML, CSS, JavaScript, TypeScript, Docker, Kubernetes, AWS, Azure, Google Cloud, Azure Data Lake Services, Data Factory, Synapse analytics, SQL Managed Instance, Google Workspace, Gemini, Windows Presentation Foundation (WPF), JSON, XML, XSLT, Azure DevOps, GitHub
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1mo
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Software Engineer (.Net, Angular)
Budapest or New York City or Washington or Vancouver or London or Galway or Munich or Bengaluru or Singapore or Sydney
HybridFull Time
Diligent
Diligent: Provides software for corporate governance, risk, and compliance management.
3+ YOE3+ years software engineering experience; strong C#/.NET Core, AWS, REST API, SQL/PostgreSQL; familiarity with Angular, Docker, CI/CD and IaC; degree in CS/Engineering or equivalent experience; good communication skills.
C#, .NET Core, Angular, AWS, PostgreSQL, SQL, NoSQL, Docker, CI/CD, IaC
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1w
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Senior Software Engineer – .NET, Azure & Angular(Onsite)
Washington, District of Columbia, United States
$81k-$142k/yr OnsiteFull Time
Cognizant
CognizantNASDAQ: CTSH: Provides IT consulting and technology services to global enterprises.
Hands-on experience with .NET Core/C#, Angular, Azure, containerization, SQL Server, DevOps and building scalable cloud-native enterprise applications.
Microsoft .NET Core, C#, ASP.NET, Web APIs, Microservices, Angular, TypeScript, JavaScript, HTML5, CSS3, RxJS, Reactive Forms, App Services, Function Apps, Azure SQL, Storage Accounts, Key Vault, Azure Active Directory, Service Bus, Docker, Kubernetes, SQL Server, Azure OpenAI, Azure Cognitive Services, Azure Bot Services, Azure Data Factory, Azure DevOps, Git, Angular CLI, NPM, SCSS, Bootstrap, Angular Material, AG Grid, Highcharts
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1mo
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Mid-Level Full-Stack Developer (.NET/Angular)
Arlington, Virginia, United States
OnsiteFull Time
Pioneering Evolution
Pioneering Evolution: Provides strategic acquisition and software solutions for defense organizations.
3+ YOEBachelor's degree required; minimum 3 years full-stack development with Microsoft .NET Core and modern front-end frameworks; RESTful API design, PostgreSQL familiarity; U.S. citizenship and active Secret clearance; on-site in Washington D.C. metro area.
Microsoft .NET Core, Angular, PostgreSQL, Docker, Kubernetes
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