Security-Cleared Software Engineer – AWS/DevOps & Java/Python

Cornerstone Defense; Herndon (VA); On-site; USD 120,000 - 180,000; Full time

Job summary

Cornerstone Defense in Herndon, VA is seeking a Software Engineer to join a mission-focused team. The role requires active TS/SCI with polygraph and hands-on software development across Java, Python, and .Net in AWS C2S environments, with Agile practices.

You will mentor peers, participate in security reviews, and contribute to infrastructure automation with Docker, Maven, Jenkins, and REST/SOAP services. Bachelor's (or Master's) in CS preferred and 3+ years of relevant experience.

Qualifications

• Bachelor's or master's in CS preferred with 3+ years of relevant experience.
• Experience in AWS C2S and cloud-based services expected.
• Familiar with infrastructure automation and CI/CD tooling.

Responsibilities

• Develop software in Java, Python, or .Net within AWS or cloud environments.
• Collaborate in Agile ceremonies and contribute to CI/CD pipelines.
• Conduct security reviews of applications and infrastructure.
• Mentor junior developers and support team growth.

Skills

Agile software development

Mentoring teammates

Security-minded development

Cloud services

Education

Bachelor's degree in Computer Science

Master's degree preferred

Tools

AWS

GitHub

Docker

Vagrant

Maven

Jenkins

REST/SOAP APIs

Job description

Cornerstone Defense in Herndon, VA is seeking a Software Engineer to join a mission-focused team. The role requires active TS/SCI with polygraph and hands-on software development across Java, Python, and .Net in AWS C2S environments, with Agile practices.

You will mentor peers, participate in security reviews, and contribute to infrastructure automation with Docker, Maven, Jenkins, and REST/SOAP services. Bachelor's (or Master's) in CS preferred and 3+ years of relevant experience.