Full Stack .NET Developer

Leidos; Bethesda (MD); On-site; USD 70,000 - 126,000; Full time

Benefits offered by this job

Health and Wellness programs

Paid Leave and Retirement

Job summary

Leidos is seeking a Full Stack .NET Developer to support federal health enterprise systems for CSR operations. Design, build, and modernize UI, APIs, and data integrations across on-prem and Azure environments, with hands-on Azure AI and identity integration.

Candidate must be local to DC Metro for hybrid/onsite in Bethesda, with minimum 2 days onsite. US Citizenship or Green Card with ability to obtain Public Trust.

Qualifications

• Bachelor’s degree in CS or related field and 3+ years of software development.
• Strong full-stack experience with C#, ASP.NET MVC, .NET/.NET Core, REST APIs, EF, ADO.NET, and SQL Server.
• Front-end skills with HTML5, CSS3, JavaScript, Bootstrap, jQuery, and AJAX, including responsive design.
• Experience deploying .NET apps in Azure, including Azure Functions and Web APIs.
• Azure AI development experience and integrating AI services via .NET APIs.
• OAuth 2.0 / OpenID Connect authentication with Login.gov or similar.
• SSO, token validation, RBAC, API security.
• Strong SQL Server / T-SQL skills; data integration.
• Git, automated testing, CI/CD, secure coding practices.
• Effective communication across technical and business teams.

Responsibilities

• Design, develop, test, and maintain responsive web apps across front end, .NET services, APIs, and data layers.
• Build dashboards for workflows such as referral, study section admin, reviewer coordination, and reporting.
• Develop C# and ASP.NET apps, REST APIs, Azure Functions, and Logic Apps.
• Design middleware for authentication, authorization, API security, and external identity provider integrations.
• Implement AI-enabled features with Microsoft Foundry / Azure AI and ensure access controls.
• Protect confidential data and follow NIH restrictions on generative AI use in peer review.
• Modernize Windows services, SOAP/WCF integrations, and SQL scripts.
• Collaborate in an Agile Scrum environment with stakeholders, designers, DBAs, testers, operations.
• Utilize CI/CD tools and secure DevSecOps practices.

Skills

C#

ASP.NET MVC

NET/.NET Core

REST APIs

Entity Framework

SQL Server

HTML5

CSS3

JavaScript

Bootstrap

Azure

OAuth 2.0/OpenID Connect

CI/CD

Git

Azure Functions

Logic Apps

WCF/SOAP

GitHub Actions

AI integration

Education

Bachelor’s degree in Computer Science or related field

Tools

Azure DevOps

Power BI

Telerik UI

MySQL

SOAP/WCF

Entra ID

Job description

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.

CANDIDATE MUST

• Be local to the DC Metro area for hybrid/onsite requirement in Bethesda, MD.
• Minimum of 2 days a week onsite in Bethesda.
• Be a US Citizen or Green Card holder with the ability to obtain a Public Trust.

Responsibilities

• Design, develop, test, and maintain responsive web applications across the 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.

Required Qualifications

• Bachelor’s degree in Computer Science, Information Technology, or a related field, and 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 the ability to work across both technical and business teams.

Preferred Qualifications

• 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.

phhs If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.

Pay Range

Pay Range: Pay Range $69,550.00 - $125,725.00 The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

Pay and Benefits

Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available here.

Securing Your Data

Leidos will never ask you to provide payment‑related information at any part of the employment application process. And Leidos will communicate with you only through emails that are sent from a Leidos.com email address. If you receive an email purporting to be from Leidos that asks for payment‑related information or any other personal information, please report the email to [e-mail].

Commitment and Diversity

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.

For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above. Original Posting: October 16, 2026

Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $17.2 billion for the fiscal year ended January 2, 2026. For more information, visit www.Leidos.com.