Senior .NET Full-Stack Developer (Secure Web Apps)

Jobtailor; Colorado; On-site; USD 120,000 - 180,000; Full time

Job summary

Jobtailor is seeking a senior .NET developer in Colorado to design and maintain secure web applications for government-oriented portfolios. You will work across UI, API, and database layers, implementing C#, .NET Core 8+, Razor Pages, and Blazor components, while ensuring code quality and security.

In a SAFe Agile environment, you will contribute to code reviews, CI/CD, and documentation of architectural decisions, with citizenship and clearance eligibility required to work on sensitive projects.

Qualifications

• 8+ years of experience with BS/BA (12+ with high school diploma).
• Strong experience in C# and .NET 8+/ASP.NET Core.
• Experience with JavaScript/TypeScript, component design, RESTful APIs.
• Experience with SQL Server databases, queries, and objects.
• U.S. Citizenship and ability to obtain Public Trust clearance.

Responsibilities

• Support a portfolio of intranet and restricted web custom applications.
• Develop and maintain secure, restricted web applications.
• Implement C#, .NET Core, Razor Pages, and Blazor components.
• Build front-end components using JavaScript/TypeScript.
• Integrate REST APIs and backend data services.
• Use Entity Framework Core for data access.
• Manage SQL Server databases and work with IIS/Windows Server.
• Troubleshoot full-stack issues across UI, API, database, and hosting layers.
• Remediate SAST/DAST findings and ensure application security.
• Support OIDC/OAuth authentication and Login.gov integration.
• Write tests, support CI/CD workflows, and participate in code reviews.

Skills

C# Development

ASP.NET Core

JavaScript/TypeScript

SQL Server Management

REST APIs

Entity Framework Core

CI/CD

Secure Coding

SAST/DAST Remediation

Git

Unit Testing

Education

BS/BA or higher

HS diploma + 12 years experience

Tools

IIS

Windows Server

Git

AI-assisted Development Tools

Job description

Jobtailor is seeking a senior .NET developer in Colorado to design and maintain secure web applications for government-oriented portfolios. You will work across UI, API, and database layers, implementing C#, .NET Core 8+, Razor Pages, and Blazor components, while ensuring code quality and security.

In a SAFe Agile environment, you will contribute to code reviews, CI/CD, and documentation of architectural decisions, with citizenship and clearance eligibility required to work on sensitive projects.