Senior Application Engineer at GCyber – Washingto, District of Columbia

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

Minimum Qualifications and Experience:

• 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

Our Benefits

GCyber is committed to the well-being and development of every employee. Our benefits are designed to support your personal and professional goals, from health and wellness programs to retirement savings and career development opportunities. Highlights include:

• 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

Equal Opportunity Employer

GCyber is an Equal Opportunity Employer. This means you don't have to worry about whether your application process will be fair. We consider all applicants without regard to race, color, religion, age, ancestry, ethnicity, gender, gender identity, gender expression, sexual orientation, veteran status, or disability.

Stay in Touch

For future job notifications please follow GCyber on LinkedIn. https://linkedin.com/company/gcyber