Software Engineer, Defense Applications - Clearance Required

LMI Consulting, LLC; Fort Belvoir (VA); On-site; USD 134,000 - 279,000; Full time

Job summary

LMI is seeking a Staff Software Engineer to build user-facing defense applications for a U.S. Army modernization program. This role owns capabilities from user need through production delivery using Palantir Foundry and modern web technologies.

This hands-on engineer will work across the stack, shape architecture, and collaborate with Army users and product teams to deliver secure, scalable software. Onsite support 2–3 days weekly at Ft. Belvoir, VA.

Qualifications

• Bachelor's degree or equivalent practical experience in computer science or software engineering.
• Eight or more years of professional software-engineering experience.
• Strong proficiency with JavaScript or TypeScript, React, and modern web-application development.
• Experience developing backend services, APIs, and data-intensive applications.
• Experience building applications on Palantir Foundry or a comparable enterprise data platform.
• Demonstrated ownership of a significant software capability from architecture through production deployment.
• Experience supporting a Department of Defense customer.
• Active Secret clearance

Responsibilities

• Own the design and delivery of user-facing defense applications.
• Build responsive interfaces, backend services, APIs, and data integrations.
• Develop applications using Palantir Foundry capabilities and modern web frameworks.
• Work directly with Army users and product designers to understand workflows and refine capabilities.
• Establish strong practices for architecture, testing, code review, security, CI/CD, and production operations.
• Diagnose complex application and integration issues across the stack.
• Mentor engineers and contribute to technical decisions across the broader platform.

Skills

JavaScript/TypeScript

React

Backend services

Palantir Foundry

Security clearance

Education

Bachelor's degree in computer science, software engineering, or a related field

Tools

Palantir Foundry

Job description

Software Engineer, Defense Applications - Clearance Required

Job Locations

US-VA-Fort Belvoir

Overview

LMI is seeking a Staff Software Engineer to build user-facing applications supporting a U.S. Army technology modernization program. This engineer will own application capabilities from user need through production delivery using Palantir Foundry and modern web technologies.

This is a hands-on role for an engineer who can work across the stack, make architectural decisions, and build software directly with users and product teams.

LMI is a new breed of digital solutions provider dedicated to accelerating government impact with innovation and speed. Investing in technology and prototypes ahead of need, LMI brings commercial-grade platforms and mission-ready AI to federal agencies at commercial speed.

Leveraging our mission-ready technology and solutions, proven expertise in federal deployment, and strategic relationships, we enhance outcomes for the government, efficiently and effectively. With a focus on agility and collaboration, LMI serves the defense, space, healthcare, and energy sectors-helping agencies navigate complexity and outpace change. Headquartered in Tysons, Virginia, LMI is committed to delivering impactful results that strengthen missions and drive lasting value.

This role requires onsite support 2 to 3 days per week at the customer site in Ft. Belvoir, VA

Responsibilities

• Own the design and delivery of user-facing defense applications.
• Build responsive interfaces, backend services, APIs, and data integrations.
• Develop applications using Palantir Foundry capabilities and modern web frameworks.
• Work directly with Army users and product designers to understand workflows and refine capabilities.
• Establish strong practices for architecture, testing, code review, security, CI/CD, and production operations.
• Diagnose complex application and integration issues across the stack.
• Mentor engineers and contribute to technical decisions across the broader platform.

Minimum Qualifications

• Bachelor's degree in computer science, software engineering, or a related field, or equivalent practical experience.
• Eight or more years of professional software-engineering experience.
• Strong proficiency with JavaScript or TypeScript, React, and modern web-application development.
• Experience developing backend services, APIs, and data-intensive applications.
• Experience building applications on Palantir Foundry or a comparable enterprise data platform.
• Demonstrated ownership of a significant software capability from architecture through production deployment.
• Experience supporting a Department of Defense customer.
• Active Secret clearance.

Preferred Qualifications

• Experience supporting the U.S. Army.
• Hands-on experience with Palantir Foundry, Army Vantage, OSDK, Workshop, or AIP.
• Experience with Python, Java, Go, or Node.js.
• Familiarity with Army acquisition or program-management processes.
• Experience with cloud platforms, DevSecOps, and AI-assisted development tools.

The target salary range for this position is $134,367 - $278,896

The salary range displayed represents the typical salary range for this position and is not a guarantee of compensation. Individual salaries are determined by various factors including, but not limited to location, internal equity, business considerations, client contract requirements, and candidate qualifications, such as education, experience, skills, and security clearances.

Applicants must meet eligibility requirements for a U.S. Government security clearance. Only US Citizens are eligible for a security clearance. For this position, LMI will only consider applicants with security clearances or applicants who are eligible for security clearances, due to the nature of the work.

Job Locations

US-VA-Fort Belvoir

LMI is an Equal Opportunity Employer

LMI is committed to the fair treatment of all and to our policy of providing applicants and employees with equal employment opportunities. LMI recruits, hires, trains, and promotes people without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, pregnancy, disability, age, protected veteran status, citizenship status, genetic information, or any other characteristic protected by applicable federal, state, or local law. If you are a person with a disability needing assistance with the application process, please contact [e-mail]

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