Senior Application Engineer

GCyber•Washingto, DC

About The Position

GCyber, LLC is seeking a Senior Application Engineer to support a high visibility customer in Washington, DC. You will join a multidisciplinary team responsible for developing, maintaining, and operating enterprise applications primarily on the .NET platform across both classified and unclassified networks. As the Senior Application Engineer, you will: Design, develop, test, and deploy web applications using C#, ASP .NET, Angular, JavaScript, HTML/CSS, and MS SQL Server Support CI/CD pipeline development and migration to modern DevSecOps tooling. Write and maintain automated tests (unit, regression, UAT) to ensure code quality and release confidence Produce clear documentation: source code, system architecture, end-user guides, and test plans Track work using Agile Kanban methodology via Jira; write and refine user stories with clear acceptance criteria Support application migrations including .NET Framework to .NET Core and VM-based hosting to containers Collaborate with government and contractor team members on development, troubleshooting, and operational support Respond to production incidents and contribute to after-action reporting and root cause analysis Ensure applications comply with Section 508 accessibility standards and federal security requirements Support additional platforms and technologies (SharePoint, React/Node.js, database administration_ as needed alongside the broader team

Requirements

Active DoD Top Secret/SCI clearance
IAT II Certification (i.e. Security+, CCNA-Security, CND, CySA+, GICSP, GSEC, SSCP)
5-7 years of professional software development experience
Strong proficiency in C#, ASP.NET, MS SQL Server, Angular, JavaScript, and HTML.CSS
Experience with Git-based source control (TFS, GitHub, GitLab)
Experience with Agile/Kanban methodologies and task tracking tools such as Jira
Solid understanding of CI/CD concepts and pipeline tooling
Strong written and verbal communication skills, ability to document technical work clearly

Responsibilities

Design, develop, test, and deploy web applications using C#, ASP .NET, Angular, JavaScript, HTML/CSS, and MS SQL Server
Support CI/CD pipeline development and migration to modern DevSecOps tooling.
Write and maintain automated tests (unit, regression, UAT) to ensure code quality and release confidence
Produce clear documentation: source code, system architecture, end-user guides, and test plans
Track work using Agile Kanban methodology via Jira; write and refine user stories with clear acceptance criteria
Support application migrations including .NET Framework to .NET Core and VM-based hosting to containers
Collaborate with government and contractor team members on development, troubleshooting, and operational support
Respond to production incidents and contribute to after-action reporting and root cause analysis
Ensure applications comply with Section 508 accessibility standards and federal security requirements
Support additional platforms and technologies (SharePoint, React/Node.js, database administration_ as needed alongside the broader team

Benefits

26 Days of Paid Leave + Annual PTO Increase
An extra day of paid leave for every year of employment with GCyber
Paid Parental Leave
Additional Leave Allowances for Military Duty, Jury Duty, and Bereavement Leave
401(k) Matching
100% Company-funded Disability Insurance
90% Company-Funded Health, Dental, and Vision Insurance, with contributions to insurance benefits for spouses, children, and family members
Training and Professional Development Plans
Commuter Benefits Plan
Parking and Transportation Allowance