Hybrid Senior Software Engineer: Legacy .NET & SQL

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

Benefits offered by this job

PTO 15 days (including parental/mmil/6

11 Federal holidays

Health and Dental Insurance (employer‑

Life Insurance

401(k) with match

FSA/DFSA/HSA plans

Tuition & Professional Development Re

Job summary

Alpha Omega Integration is seeking a Senior Software Engineer to support a Federal project, combining development and operations across Classic ASP/VBScript, ASP.NET Web Forms, and .NET Framework. You will work on Windows-based hosting, SQL Server, and enterprise integrations while delivering Tier 3 production support in a secure environment.

The role emphasizes incremental modernization and reliable deployment practices using Git-based pipelines and CI/CD.

Qualifications

• Six or more years of professional software development or application-support experience in an enterprise Microsoft environment.
• Experience with Classic ASP/VBScript, ASP.NET Web Forms, VB.NET or C# on .NET Framework.
• Strong SQL Server skills and experience with IIS on Windows servers.
• Experience with Git-based source control and enterprise build/release pipelines.
• Knowledge of authentication concepts (Windows/AD, Entra ID, AD FS, SAML) and secure coding practices.

Responsibilities

• Provide Tier 3 support for mission-critical applications, triage incidents, diagnose issues across code, databases, and integrations.
• Maintain and enhance legacy Microsoft applications (Classic ASP/VBScript, ASP.NET Web Forms, VB.NET, C#).
• Develop and maintain SQL Server queries and stored procedures; investigate performance issues.
• Support IIS-hosted apps and Windows environments; manage deployments and troubleshooting.
• Build and support secure API integrations with least-privilege access and credential handling.
• Document decisions, support procedures, and operational handoffs; use CI/CD for promotions.

Skills

Clear written and verbal communication

Problem-solving

Time-management

Team collaboration

Education

Bachelor’s degree in computer science or related field

Tools

Classic ASP

ASP.NET Web Forms

VB.NET / C# on .NET Framework

PowerShell

Git-based source control (GitHub Actions / Azure DevOps / TFS)

Job description

Alpha Omega Integration is seeking a Senior Software Engineer to support a Federal project, combining development and operations across Classic ASP/VBScript, ASP.NET Web Forms, and .NET Framework. You will work on Windows-based hosting, SQL Server, and enterprise integrations while delivering Tier 3 production support in a secure environment.

The role emphasizes incremental modernization and reliable deployment practices using Git-based pipelines and CI/CD.