Senior .NET Developer - 164164

Project Description:

Provides advanced technical expertise and guidance in the design, modernization, and support of the agency s missioncritical software systems. Modernizes legacy / .NET Framework applications into C# and .NET 8+. Ensures solutions are secure, scalable, and aligned with agency needs. Leverages Azure DevOps for CI/CD, version control, and work tracking. Works under a highly skilled and experienced team.

Experience and Skills Required:

• .NET 8+ and C# development
• Azure DevOps for CI/CD, version control, and work tracking
• Strong analytical and communication skills
• Demonstrated experience developing and maintaining secure custom web applications using C#/.NET, Razor Pages, Entity Framework, and Microsoft SQL Server
• Experience deploying, configuring, and troubleshooting applications hosted on IIS in on-premises Windows Server environments
• Strong working knowledge of relational database design, stored procedures, migrations, data classification/governance, audit trail, and secure handling of sensitive application data
• Ability to work on public-facing and internal enterprise applications where security, reliability, auditability, regulatory/statutory compliance, and operational stability are critical
• Familiarity with authentication, authorization, role-based access control, secure configuration management, logging, and error handling for production web applications
• Experience working within restricted or high-security enterprise environments where arbitrary third-party dependencies, public APIs, SaaS platforms, or common cloud services may not be approved or available
• Operational risk management, ability to understand and safely modify existing codebases, including legacy systems, without introducing unnecessary architectural complexity or risk
• Strong documentation, communication, and source control practices, with the ability to thoughtfully coordinate changes across development, test, and production environments

The Contractor/Technician agrees to the following scope of work which should include but may not be limited to:

• Modernize legacy / .NET Framework applications to C# and .NET 8+
• Design, develop, and maintain secure web applications using C#/.NET, Razor Pages, Entity Framework, and Microsoft SQL Server
• Deploy, configure, and troubleshoot applications hosted on IIS in on-premises Windows Server environments
• Implement and maintain CI/CD pipelines, version control, and work tracking using Azure DevOps
• Ensure solutions meet agency requirements for security, scalability, reliability, auditability, and compliance
• Collaborate with stakeholders to understand requirements and deliver solutions aligned with agency needs
• Maintain strong documentation and coordinate changes across development, test, and production environments
• Operate within restricted or high-security enterprise environments, adhering to agency policies regarding third-party dependencies and cloud services
• Manage operational risk and safely modify existing codebases, including legacy systems
• Provide technical guidance and support to team members
• This position is expected to work and be available 8-5.