Senior .NET Application Engineer

Significance • Rockville, MD

2d • $150,000 - $170,000 • Hybrid

About The Position

Significance is a woman-owned consulting firm serving the federal government. We are known for building trusted relationships within our teams and with our clients and hiring the highest-level experts who implement innovative solutions. We also like to have fun! Our focus on culture has contributed to Significance being named a Washington Business Journal Best Place to Work each of the last seven years. Signficiance, Inc. is seeking a Senior .NET Application Engineer to support the Transportation Services Division within the Department of Health and Human Services (HHS). This is hybrid role and the location is Rockville, MD. This position requires the ability to obtain and maintain a Public Trust clearance. The senior engineer will take ownership of a legacy ASP.NET MVC platform undergoing modernization. The system supports multiple operational domains and includes role-based access, SSO authentication, SQL Server stored procedure workflows, and reporting integrations. The ideal candidate will be comfortable maintaining business-critical systems while driving incremental improvements in architecture, security, and reliability.

Requirements

• 7+ years of experience with C#, ASP.NET MVC (classic), and .NET Framework enterprise applications
• Experience integrating or maintaining DevExpress web and reporting components in ASP.NET MVC
• Strong expertise in SQL Server and T-SQL, including stored procedures and job scheduling
• Experience with enterprise SSO and authentication/session lifecycle design
• Hands-on experience with large-scale role and permission systems

Nice To Haves

• Experience modernizing legacy MVC applications (incremental refactoring, performance optimization, security improvements)
• Background in government, healthcare, or other regulated environments

Responsibilities

• Maintain and enhance a .NET Framework 4.8 ASP.NET MVC application with multiple functional modules and shared platform services
• Manage authentication and session behavior, including Forms Authentication, SSO integration, and secure cookie/session handling
• Implement and review fine-grained role-based authorization across modules and submodules
• Develop and support SQL Server stored procedures and scheduled back-office processes (alerts, nightly jobs, operational monitoring)
• Support reporting and document workflows using DevExpress components and related web handlers
• Collaborate with operations and business stakeholders to stabilize production systems and deliver enhancements in a regulated environment

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Education Level: No Education Listed