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.
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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.
Original Posting:October 16, 2026For 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.
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.
Skills Required
- Bachelor's degree in Computer Science, Information Technology, or a related field
- 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
- 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, including AI service integration, search or retrieval features, output evaluation, and secure AI data flows
- Experience implementing OAuth 2.0 and OpenID Connect authentication and authorization middleware, including Login.gov or comparable identity provider integration
- 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
- 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
Leidos Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Leidos and has not been reviewed or approved by Leidos.
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Healthcare Strength — Healthcare coverage is described as comprehensive, with multiple plan options, low office-visit copays in some plans, and access to mental health and wellness support tools. The availability of HSA/FSA options and employer contributions is positioned as a meaningful part of the total package.
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Retirement Support — Retirement benefits are framed as a strong component of total rewards, highlighted by a 401(k) match and immediate vesting in the standard package. The Employee Stock Purchase Plan is also presented as an additional long-term wealth-building feature.
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Wellbeing & Lifestyle Benefits — Wellbeing and lifestyle supports extend beyond core insurance, including wellness programs, fitness-related stipends, and assistance resources. Work flexibility and related perks are also included as part of the broader rewards experience.
Leidos Insights
What We Do
We Are Leidos For 50 years we have been tackling some of the biggest problems that face our nation and our world. OUR MISSION Through our culture of innovation and history of performance, we develop deep customer trust built on integrity and create enduring solutions that improve our world. Leidos is a science and technology solutions leader working to address some of the world’s toughest challenges in the defense, intelligence, homeland security, civil, and healthcare markets. The company’s 43,000 employees support vital missions for government and commercial customers. Headquartered in Reston, Va., Leidos reported annual revenues of approximately $11.09 billion for the fiscal year ended January 3, 2020. Leidos was cited for the meaningful work employees perform that is challenging, impactful, and aligned with our customers’ missions as reasons professionals want to work and stay at our company. Leidos has also been named to lists including Forbes’ Best Employers for Diversity, Forbes’ America’s Best Employers for Women, Military Times Best for Vets Employers, and Ethisphere Institute’s World's Most Ethical Companies®. Employees enjoy career enrichment opportunities available through mobility and development and experience rewarding relationships with supportive supervisors and talented colleagues and customers. Employees appreciate our flexible work environment, allowing for and encouraging a true work-life balance. Our professionals are also excited about our Employee Resource Groups, like the newly launched Collaborative Outreach with Remote and Embedded Employees (CORE), which strives to create an environment where every employee, regardless of location, feels fully engaged as a valued employee of Leidos. Your most important work is ahead.
