Full Stack .NET Developer

Leidos • Bethesda, MD

13h • Hybrid

About The Position

Leidos is seeking a Full Stack .NET Developer to support federal health enterprise systems for the Government Health and Safety Solutions Operation. The developer will build and modernize user interfaces, APIs, business services, and data integrations that support NIH Center for Scientific Review (CSR) operations. The role spans on-premises and approved Azure environments and requires hands-on Azure AI and identity integration experience.

The candidate must be local to the DC Metro area for the hybrid/onsite requirement in Bethesda, Maryland, and work onsite at least two days per week. Candidates must be U.S. citizens or Green Card holders and able to obtain a Public Trust.

Requirements

• Bachelor’s degree in Computer Science, Information Technology, or a related field.
• At least 3 years of relevant software development experience.
• Strong full-stack experience with C#, ASP.NET MVC, .NET/.NET Core, REST APIs, Entity Framework, ADO.NET, and SQL Server.
• Hands-on front-end experience with HTML5, CSS3, JavaScript, Bootstrap, jQuery, and AJAX, including responsive design and accessibility.
• Experience building and deploying .NET applications in Azure, including Azure Functions and Web APIs.
• Practical Azure AI development experience, such as integrating AI services through .NET APIs, implementing search or retrieval features, evaluating output quality, and securing AI data flows.
• Hands-on experience implementing authentication and authorization middleware using OAuth 2.0 and OpenID Connect, including integration with Login.gov or a comparable identity provider.
• Experience with single sign-on, token validation, claims-based or role-based access control, and securing APIs and user sessions.
• Strong SQL Server and T-SQL skills, including stored procedures and data integration.
• Proficiency with Git, automated testing, CI/CD, and secure coding practices.
• Strong communication skills and ability to work across technical and business teams.
• Local to the DC Metro area and able to work onsite in Bethesda at least two days per week.
• U.S. citizen or Green Card holder with the ability to obtain a Public Trust.

Nice To Haves

• Direct experience integrating applications with Microsoft Entra ID.
• Experience supporting NIH, federal grants administration, scientific peer review operations, or other federal health systems.
• Experience with Copilot Studio, Power BI, SSRS, Telerik UI, MySQL, or legacy SOAP/WCF services.
• Familiarity with Azure Government environments and Microsoft Entra ID.
• Azure or Microsoft DevOps certification.

Responsibilities

• Design, develop, test, and maintain responsive web applications across front-end, .NET services, APIs, and database layers.
• Build accessible interfaces and dashboards for workflows such as application referral, study section administration, reviewer coordination, and reporting.
• Develop C# and ASP.NET applications, REST APIs, Azure Functions, and Logic Apps.
• Design application middleware for authentication, authorization, API security, and external identity provider integrations.
• Build and evaluate approved AI-enabled features using Microsoft Foundry (formerly Azure AI Foundry), Azure AI Search, and Azure AI services, with appropriate access controls, testing, and human review.
• Protect confidential application and review information and follow NIH restrictions on generative AI use in peer review.
• Maintain and modernize existing Windows services, console applications, SOAP/WCF integrations, and SQL scripts.
• Collaborate with business stakeholders, designers, architects, DBAs, testers, and operations staff in an Agile Scrum environment.
• Use automated testing, code review, GitHub Actions or comparable CI/CD tools, and secure DevSecOps practices.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level