Senior Software Engineer - TS/SCI Clearance, Defense

Cornerstone Defense LLC; Chantilly (VA); On-site; USD 120,000 - 190,000; Full time

Benefits offered by this job

Medical, Dental & Vision plans

Generous PTO

401(k)

HSA/FSA options

Life and Disability Insurance

Tuition Reimbursement

Fitness Reimbursement

Referral Program

Travel Assistance

Job summary

Cornerstone Defense LLC is seeking a Software Engineer in Chantilly, VA to design and develop software for defense and intelligence applications. Candidates must possess active TS/SCI w/ Polygraph and have a strong background in C# development and software architecture.

Preferred qualifications include Java/Android experience, C/C++/Assembly, and PowerShell, with demonstrated leadership of software teams. The role emphasizes high-security environments and mission-focused delivery.

Qualifications

• Bachelor's Degree in Computer Science, Information Systems, Engineering or related STEM field and 9+ years related experience.
• Experience with Software Architecture.
• Requirements definition including iterative derivation with customer input.
• 8+ years development experience with C#.

Skills

C#

Java

Android

C

C++

Assembly

PowerShell

Software Architecture

Team Leadership

Requirements Definition

Education

Bachelor's Degree in Computer Science or related STEM

Tools

PowerShell

Job description

Cornerstone Defense LLC is seeking a Software Engineer in Chantilly, VA to design and develop software for defense and intelligence applications. Candidates must possess active TS/SCI w/ Polygraph and have a strong background in C# development and software architecture.

Preferred qualifications include Java/Android experience, C/C++/Assembly, and PowerShell, with demonstrated leadership of software teams. The role emphasizes high-security environments and mission-focused delivery.