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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Staff Software Engineer, Defense Applications - Clearance Required - **Company:** LMI - **Location:** Fort Belvoir, VA, United States - **Experience:** Expert - **Salary:** $134,367.0 - $232,404.0 - **Contract:** Permanent contract - **Skills:** Java (Programming Language), JavaScript (Programming Language), Application Programming Interfaces (APIs), Applications Architecture, Big Data, Code Review, Continuous Integration, Data Integration, Web Development, Python (Programming Language), Node.Js, Software Deployment, Software Engineering, TypeScript, Enterprise Data Management, ReactJS, Backend, SC Clearance, Information Technology, Devsecops, Golang - **Published:** August 20, 2026 - **Apply:** https://diversityjobs.com/main/sendform/8/8/28176/1/18012663?backUrl=%2Fcareer%2F18012663%2FStaff-Software-Engineer-Defense-Applications-Clearance-Required-Virginia-Fort-Belvoir ## About the Role * 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., * 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 - $232,404 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. ## Description 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. ## Related Videos - [Watch Tests Go Brrrr! : Getting Started with Cypress in ReactJS](https://www.wearedevelopers.com/videos/282-watch-tests-go-brrrr-getting-started-with-cypress-in-reactjs) - [Developing the Backend with Stefan Lingler, CTO at Shpock](https://www.wearedevelopers.com/videos/100360-developing-the-backend-with-stefan-lingler-cto-at-shpock) - [Go with the Flow: Stop the Leaks Before Your Memory's a Waterfall!](https://www.wearedevelopers.com/videos/100073-go-with-the-flow-stop-the-leaks-before-your-memory-s-a-waterfall) - [Security Pitfalls for Software Engineers](https://www.wearedevelopers.com/videos/726-security-pitfalls-for-software-engineers) - [Nest.js - TypeScript in the backend can also be clean](https://www.wearedevelopers.com/videos/1033-nest-js-typescript-in-the-backend-can-also-be-clean) - [Slopquatting, API Keys, Fun with Fonts, Recruiters vs AI and more - The Best of LIVE 2025 - Part 2](https://www.wearedevelopers.com/videos/1765-slopquatting-api-keys-fun-with-fonts-recruiters-vs-ai-and-more-the-best-of-live-2025-part-2) ## Related Articles - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [Software Engineer Salary London](https://www.wearedevelopers.com/magazine/252-software-engineer-salary-london) - [How Much Does a Software Engineer Make? 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