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# Senior Software Engineer

- **Company:** Smart Synergies
- **Location:** Springfield, VA, United States
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** JavaScript (Programming Language), Application Programming Interfaces (APIs), Applications Architecture, Big Data, Code Review, Continuous Integration, Data Integration, Web Development, Software Architecture, Software Deployment, Software Engineering, TypeScript, Enterprise Data Management, ReactJS, Backend, SC Clearance, Information Technology
- **Published:** September 28, 2026
- **Apply:** https://www.clearancejobs.com/jobs/9196876/senior-software-engineer

## 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.

## Description

Our client 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.

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.