Internship Software Engineer Military Jobs in Cape Cod, MA

Valiant Harbor International is a CVE Service-Disabled Veteran Owned Small Business that specializes in technical, programmatic, acquisition, compliance, and financial services for Government science and technology, research and development, and technological programs. At Valiant Harbor International, we emphasize our intense focus on helping federal government agencies identify and address organizational challenges to tailor and integrate specific solutions to solve their most difficult problems. Success is defined by our ability to meet our customer’s needs quickly, efficiently, and effectively —we are a management consulting firm with a successful record of offering a wide range of professional, scientific, and technical services requiring a high degree of expertise and training.
Job Description
Valiant Harbor International is seeking an experienced Full-Stack Software Engineer to join a small, highly technical team supporting advanced U.S. Air Force programs. In this role, you'll design, develop, and deliver secure, scalable software solutions while working directly with government stakeholders to solve complex technical challenges in a mission-critical environment.
If you enjoy building high-impact software, influencing technical decisions, and working across the full software development lifecycle, we'd love to hear from you.
What You'll Do

• Design, develop, and maintain secure, scalable full-stack software solutions.
• Build enterprise integrations, APIs, and database-driven applications.
• Collaborate directly with Air Force stakeholders to translate mission needs into technical solutions.
• Design system architecture and contribute to long-term technical roadmaps.
• Develop clean, maintainable, well-tested code following modern software engineering best practices.
• Participate in code reviews and mentor teammates through technical collaboration.
• Troubleshoot and resolve complex software, integration, and performance issues.
• Support secure software development and DevSecOps practices throughout the software lifecycle.
• Contribute to continuous improvement of shared libraries, development tools, and engineering processes.
• Stay current with emerging technologies and recommend new tools and approaches that improve system performance, security, and maintainability.

• Java
• Linux/Unix
• Git
• REST APIs
• SQL databases
• XML
• Enterprise system integration
• Secure software development
• DevSecOps practices
• Modern software architecture and design

• Active Secret security clearance.
• Ability to obtain and maintain a Top Secret clearance with SCI eligibility.
• Bachelor's degree in Computer Science, Software Engineering, or related STEM discipline.
• 7-10 years of professional software engineering experience.
• Strong experience developing secure, scalable full-stack applications.
• Experience developing software in Java and working within Linux/Unix environments.
• Experience with containerization, cloud technologies, CI/CD pipelines, or modern Java frameworks is a plus.
• Strong analytical, troubleshooting, and problem-solving skills.
• Ability to communicate effectively with technical and non-technical stakeholders.
• Willingness to travel as required.

• Experience supporting Department of Defense or Intelligence Community programs.
• Familiarity with SIPRNet and JWICS environments.
• Experience designing software architectures and technical roadmaps.
• Experience supporting agile software development teams.
• Former military service or prior experience supporting DoD customers.

Security Clearance: Active Secret clearance required prior to selection. Selected candidate must be eligible to obtain a Top Secret clearance with SCI eligibility.
Salary: Competitive and commensurate with experience.
Why Join Valiant Harbor?
At Valiant Harbor International, you'll work alongside experienced professionals supporting some of the nation's most important technology initiatives. As a growing small business, our engineers have the opportunity to make meaningful technical contributions, work directly with customers, influence solution design, and solve challenging engineering problems that have real-world impact.
If you're looking for an opportunity to combine cutting-edge software engineering with meaningful mission impact, we'd love to talk with you.