Software Engineer, Defense Applications - Clearance Required

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. The role is hands‑on, spanning the full stack, making architectural decisions, and building software directly with users and product teams.

LMI is a digital solutions provider dedicated to accelerating government impact with innovation and speed. By investing in technology and prototypes ahead of need, LMI brings commercial‑grade platforms and mission‑ready AI to federal agencies at commercial speed. Leveraging mission‑ready technology, proven federal deployment expertise, and strategic relationships, LMI enhances 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.

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.
• U.S. citizenship (required for security clearance eligibility).

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.

Pay

The target salary range for this position is $134,367 – $278,896. The range represents typical compensation for this role and is not a guarantee. Individual salaries are determined by factors including location, internal equity, business considerations, client contract requirements, and candidate qualifications such as education, experience, skills, and security clearances.

Location

Fort Belvoir, Virginia (on‑site support 2–3 days per week at the customer site).