Senior Software Engineer

United States·Viennasenior

Software EngineerSoftware Engineering

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Quick Summary

Key Responsibilities

Provide Tier 3 support for mission-critical applications. Triage incidents, diagnose root causes across code, databases, integrations, and infrastructure, communicate status,

Technical Tools

Software EngineerSoftware Engineering

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.

Responsibilities

~1 min read

→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.

Requirements

~2 min read

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.

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.

What We Offer

~1 min read

The likely salary range for this position is $90,000 - $130,000. This is not, however, a guarantee of compensation or salary. There are multiple factors that are considered in determining final pay for a position, including, but not limited to, relevant work experience, skills, certifications and competencies that align to the specified role, education and certifications as well as contract provisions regarding labor categories that are specific to the position and could fall outside of this range.

Guided by our core values—Harmony, Engagement, Accountability, Resourcefulness, and Tenacity (HEART)— we foster a culture of innovation, collaboration, and continuous learning and are committed to delivering high-impact solutions. We recognize and reward hard work.

Through our H.E.A.R.T. Awards Program, colleagues and managers can recognize each other for actions that exemplify these values. Recognized employees receive a detailed nomination highlighting their contributions, which is shared with their manager. Each quarter, select nominees have the opportunity to receive a monetary bonus as an extra thank-you for their impact.

Alpha Omega is an award-winning Federal IT solutions provider dedicated to delivering mission-enabling technology and strategic solutions across the National Security, Federal Financial, Healthcare, and Space & Science domains. Since our founding in 2016, we have grown to over 800 employees nationwide with $230m in revenue. With the January 2025 acquisitions of SeKON and Macro Solutions, we have expanded our capabilities to further support our customers in digital modernization, artificial intelligence, and cybersecurity.

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).

Through strategic partnerships, intellectual property, and relentless drive for innovation, Alpha Omega is shaping the future of government technology. We are proud to be a Virginia Best Places to Work 8 times, an Inc. 5000 honoree 7 times, and a Washington Post Top Workplaces 4 times. Join us in driving transformation that secures the nation's future.

Alpha Omega Integration, LLC (Alpha Omega) is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or veteran status, or any other protected class.