Software Engineer - Military Systems

Valiant Harbor International, LLC; Lincoln (MA); On-site; USD 120,000 - 160,000; Full time

Job summary

Valiant Harbor International, LLC seeks an experienced Full‑Stack Software Engineer to join a small, highly technical team supporting advanced U.S. Air Force programs.

You will design, develop, and deliver secure, scalable software solutions while collaborating 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,

Qualifications

• Active Secret security clearance.
• Ability to obtain and maintain a Top Secret clearance with SCI eligibility.
• Bachelor’s degree in CS, SE, or related STEM field.
• 7–10 years of professional software engineering experience.
• Experience developing secure, scalable full‑stack applications.
• Experience with Java and Linux/Unix.
• Containerization, cloud tech, CI/CD pipelines or modern Java frameworks a plus.
• Strong analytical, troubleshooting, and communication skills; willingness to travel.

Responsibilities

• Design, develop, and maintain secure, scalable full‑stack software solutions.
• Build enterprise integrations, APIs, and database‑driven apps.
• Collaborate with Air Force stakeholders to translate mission needs into technical solutions.
• Design system architecture and contribute to roadmaps.
• Develop clean, well‑tested code following best practices.
• Participate in code reviews and mentor teammates.
• Troubleshoot and resolve complex software, integration, and performance issues.
• Support secure software development and DevSecOps throughout lifecycle.
• Contribute to shared libraries, tools, and engineering processes.
• Stay current with emerging technologies and recommend new tools.

Skills

Java

Linux/Unix

Git

REST APIs

SQL databases

XML

Enterprise system integration

Secure software development

DevSecOps

Modern software architecture

Education

Bachelor’s degree in Computer Science, Software Engineering, or related STEM discipline

Tools

Containerization

Cloud technologies

CI/CD pipelines

Modern Java frameworks

Job description

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.

Technology Environment

While technologies vary by program, qualified candidates should be able to demonstrate experience with the following:

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

Required Qualifications

• 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.

Preferred Qualifications

• 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.

EEO Statement: Valiant Harbor International, LLC is an Equal Opportunity/Affirmative Action employer. Valiant Harbor International prohibits discrimination with respect to the hiring or promotion of individuals, conditions of employment, disciplinary and discharge practices, or any other aspect of employment on the basis of sex, race, color, age, national origin, religion, disability, marital status, sexual orientation, gender identity, pregnancy, veteran status, or any other protected class. If you are an individual with a disability and require a reasonable accommodation to complete any part of the application process, or are limited in the ability or unable to access or use this online application process and need an alternative method for applying, you may contact (202) 417‑6705 for assistance.

This is a full time position.