Senior Software Engineer

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

Brief Description

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.

Key Responsibilities

• 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.

Required Qualifications

• 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.

Salary And Benefit Information

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.

Application Deadline: December 31, 2026

Benefits

Joining the Alpha Omega team entitles you to participate in all retirement benefits, plans of deferred compensation, health and insurance benefits, and other such benefits as set forth in the company’s policy and benefits manuals. See below, to name a few:

• 15 days PTO including paid parental, military, and bereavement leave
• Eleven (11) paid Federal holidays, five of which are floating holidays (as designated by the company’s holiday schedule each year)
• Health and Dental Insurance (including 100% employer paid premiums for employee coverage under the HDHP health plan)
• Life Insurance, STD/LTD term disability coverage, with employer paid premiums
• 401 (k) plan with a match that is 100% vested after you complete two years of service
• FSA/DFSA/HSA flexible benefit plans
• Annual Tuition & Professional Development Reimbursement benefit

We regularly review our Total Rewards package to ensure our offerings are competitive and reflect what our employees have told us they value most.

Our Company

Alpha Omega is an award‑winning solutions provider dedicated to delivering mission‑enabling technology and strategic solutions for our customers. Since our founding in 2016, we have grown to over 700 employees nationwide consisting of former operators, technologists, and strategists who bring decades of government and industry experience. They are united by one purpose: ensuring our nation’s continued global leadership.

We have a unified operating model providing technical capabilities and solutions for customers across two main business units:

• National Security – supporting agencies such as the Department of Homeland Security (DHS), Navy, Air Force, Army, and the Department of State (DOS).
• National Resilience – supporting agencies such as Federal Deposit Insurance Corporation (FDIC), Treasury, Health & Human Services (HHS), National Institutes of Health (NIH), 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.

Culture And Values

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.

Alpha Omega's culture is driven by our values and mission. We invest in top talent through mentorship, growth, and meaningful work. We value individuality, reward integrity, and foster a diverse, high‑performing team united by purpose‑at work, in service, and in the community.

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.