Senior Software Engineer

Job Title:
Senior Software Engineer
Clearance Required:
Public Trust
Work Location:
Hybrid;
Vienna,VA

Alpha Omega is seeking a qualified Senior Software Engineer for one of our prime Federal projects. He will support, maintain, and improve a suite of business-critical applications used in a regulated financial-services environment. The portfolio includes public-facing Classic ASP and ASP.NET Web Forms applications, as well as a Windows-based .NET document-processing application.

The developer will work across application code, SQL Server, IIS and Windows hosting, enterprise integrations, and release processes. The role emphasizes reliable Tier 3 production support and secure, incremental modernization.

• Provide Tier 3 support for mission-critical applications. Triage incidents, diagnose root causes across code, databases, integrations, and infrastructure, communicate status, and deliver durable fixes.
• Maintain and enhance legacy Microsoft applications, including Classic ASP/VBScript and ASP.NET Web Forms on .NET Framework using  and C#.
• Support Windows-based background processing and document workflows, including file handling, conversion, status tracking, and exception recovery.
• Develop and maintain SQL Server queries, stored procedures, and data-access code. Investigate performance and data-integrity issues.
• Support IIS-hosted applications and Windows environments, including application configuration, deployments, and environment-specific troubleshooting.
• Build and support secure integrations with enterprise APIs and services. Apply least-privilege access, safe credential handling, and appropriate authentication practices.
• Clarify requirements with business and technical stakeholders. Communicate technical issues, risks, and trade-offs clearly.
• Develop prototypes and incremental improvements where appropriate. Document technical decisions, support procedures, configuration, and operational handoffs.
• Use source control and CI/CD processes to build, validate, and promote changes through development, test, and production environments.
• Improve verification practices, including regression, integration, and deployment smoke tests. Follow established change-control and operating procedures.

• U.S. citizenship and ability to pass the client-required criminal and financial background investigation.
• Bachelor’s degree in computer science, Information Technology, or a related field, or an equivalent combination of education and relevant experience.
• Six or more years of professional software development or application-support experience in an enterprise Microsoft environment, including hands‑on maintenance of legacy applications.
• Practical experience with one or more of the following:
  Classic ASP/VBScript, ASP.NET Web Forms, , or C# on .NET Framework. Able to understand unfamiliar code and make safe, supportable changes.
• Strong SQL Server skills, including writing and troubleshooting queries and stored procedures.
• Experience supporting IIS-hosted applications and Windows servers or virtual machines. Experience using Power Shell for support or automation.
• Experience with Git-based source control and enterprise build and release pipelines, such as Git Hub Enterprise/Git Hub Actions, Azure Dev Ops, or TFS.
• Working knowledge of authentication and identity concepts, such as Windows or Active Directory authentication, Microsoft Entra , AD FS, and SAML.
• Strong incident analysis, problem‑solving, prioritization, and time‑management skills. Careful attention to detail when implementing changes and following standard operating procedures.
• Clear written and verbal communication skills, including the ability to work directly with business users, technical teams, and client…