Senior Software Engineer — Legacy .NET & ASP Web Apps

Alpha Omega; Vienna (VA); Hybrid; USD 90,000 - 130,000; Full time

Benefits offered by this job

15 days PTO

11 federal holidays

Health and Dental Insurance

Life Insurance

401(k) plan with match

FSA/DFSA/HSA

Tuition & Professional Development Reh

Job summary

Alpha Omega is seeking a Senior Software Engineer to maintain and modernize critical Windows/.NET applications in a hybrid Vienna, VA environment. You’ll triage incidents, fix legacy code in Classic ASP/VBScript and ASP.NET Web Forms, and optimize SQL Server data access while ensuring secure, reliable deployments.

You will work across Windows hosting, IIS, and enterprise integrations, applying best practices in change control, testing, and CI/CD. A Public Trust clearance is required.

Qualifications

• Six+ years of enterprise software development or application support in a Microsoft environment.
• Experience with Classic ASP/VBScript, ASP.NET Web Forms on .NET Framework.
• Strong SQL Server querying and stored procedures.
• Experience with IIS-hosted apps and PowerShell for automation.
• Git-based source control and enterprise build/release pipelines.

Responsibilities

• Provide Tier 3 support for mission-critical applications and triage incidents.
• Maintain and enhance legacy Microsoft apps in VB/VBScript and .NET.
• Support Windows-based background processing and document workflows.
• Develop and optimize SQL Server queries and data access code.
• Manage IIS-hosted apps, deployments, and environment troubleshooting.
• Build secure integrations with enterprise APIs and services.
• Document decisions, procedures, and handoffs; communicate risks clearly.
• Use CI/CD to promote changes through dev/test/prod environments.
• Improve verification with regression and integration tests.

Skills

Classic ASP

VBScript

ASP.NET Web Forms

VB.NET

C#

SQL Server

IIS

PowerShell

GitHub Enterprise

Azure DevOps

TFS

Education

Bachelor’s degree in computer science, information technology, or related field

Tools

Microsoft .NET Framework

Windows Server

VB.NET

C#

Job description

Alpha Omega is seeking a Senior Software Engineer to maintain and modernize critical Windows/.NET applications in a hybrid Vienna, VA environment. You’ll triage incidents, fix legacy code in Classic ASP/VBScript and ASP.NET Web Forms, and optimize SQL Server data access while ensuring secure, reliable deployments.

You will work across Windows hosting, IIS, and enterprise integrations, applying best practices in change control, testing, and CI/CD. A Public Trust clearance is required.