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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Software Engineer - **Company:** Llc (alpha Omega) - **Location:** Vienna, VA, United States - **Experience:** Expert - **Salary:** $90,000.0 - $130,000.0 - **Contract:** Permanent contract - **Skills:** ASP.NET, Java (Programming Language), .NET Framework, Vbscript, Microsoft Windows, Active Directory, Application Configuration Access Protocols, User Authentication, Automation of Tests, Microsoft Azure, Batch Processing, C Sharp (Programming Language), Databases, Continuous Integration, Data Integrity, Software Design Patterns, Github, Internet Information Services (IIS), IT Management, Microsoft Servers, Microsoft Software, Microsoft SQL Server, Team Foundation Server, Visual Basic .NET (Programming Language), Windows Servers, Windows PowerShell, Release Management, Azure Active Directory, Security Assertion Markup Language (SAML), Secure Coding, Microsoft SharePoint, Software Engineering, SQL Stored Procedures, SQL Server Integration Services, Systems Integration, Virtual Machines, Web Services, Data Logging, Spring-boot, Git, Information Technology, Github Enterprise, Asp.net Web Forms, 3-tier Architectures, Api Gateway, Restful APIs, Software Version Control, Legacy Systems, Mulesoft - **Published:** October 14, 2026 - **Apply:** https://www.clearancejobs.com/jobs/9238875/senior-software-engineer ## About the Role * 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, VB.NET, 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 PowerShell for support or automation. * Experience with Git-based source control and enterprise build and release pipelines, such as GitHub Enterprise/GitHub Actions, Azure DevOps, or TFS. * Working knowledge of authentication and identity concepts, such as Windows or Active Directory authentication, Microsoft Entra ID, 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 stakeholders. * Knowledge of the software development life cycle, secure coding practices, common design patterns, and production change-management practices. Preferred Qualifications: * Experience with Microsoft Graph, SharePoint, MSAL, or app-only authentication, including secure management of application credentials. * Experience with REST APIs and enterprise integrations, including API gateways or MuleSoft. * Experience with SSIS, COM/COM+, scheduled or batch processing, or document and PDF workflows. * Experience with Azure services or hybrid Azure/on-premises environments, and familiarity with IT governance and operational controls. * Experience adding automated tests, structured logging, monitoring, alerting, and production-readiness checks to established applications. * Experience with Java/Spring Boot is helpful when supporting adjacent systems, but is not a core technology for this role. ## Description 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 VB.NET 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., We are committed to supporting our agency partners as they transform their operations, delivering on our purpose to ensure the safety, security, and well-being of future generations: * National Security - Supporting agencies such as the Department of Homeland Security (DHS) and the Department of State. * Federal Financial - We bring deep expertise in enterprise financial systems, supporting agencies like the Securities and Exchange Commission (SEC) and the Federal Deposit Insurance Corporation (FDIC). * Healthcare - Our Health IT capabilities, enhance health outcomes for the warfighter via the Defense Health Agency (DHA) and support public health initiatives at the Centers for Disease Control and Prevention (CDC), National Institutes of Health (NIH), and the Substance Abuse and Mental Health Services Administration (SAMHSA). * Space & Science - We leverage technology to advance agricultural sustainability, secure our nation's food supply, and prepare for natural disasters, working with the National Oceanic and Atmospheric Administration (NOAA) and the United States Department of Agriculture (USDA).