Java Software Engineer with Security Clearance

Mid-Level / Senior Java & C++ Software Engineer (Qt) Our client is seeking Mid-Level and Senior Software Engineers with experience in Java, C++, and Qt to support a long-term federal aviation modernization program. Engineers will design, develop, test, and integrate mission-critical software applications in a Linux environment while collaborating with cross-functional engineering teams throughout the software development lifecycle. This is a 5-year project offering long-term stability and the opportunity to work on complex software supporting international aviation systems. Location: Hybrid – 2 days onsite in Gaithersburg, MD Duration: 5-year project with long-term extensions Employment Type: Contract-to-Hire / W2 Clearance: Ability to obtain Public Trust Due to federal security requirements, applicants must be U.S. Citizens and able to successfully obtain and maintain a Public Trust clearance. Responsibilities • Design, develop, test, and integrate Java and C++ applications in a Linux environment. • Develop graphical user interfaces using the Qt Framework. • Participate throughout the software development lifecycle, including requirements analysis, design, coding, testing, integration, and deployment. • Collaborate with software engineers using Git-based version control and participate in code reviews. • Troubleshoot software defects and performance issues while supporting system integration activities. • Develop and maintain build scripts and automation supporting development and CI workflows. • Work closely with systems engineers, software developers, and test teams to deliver high-quality software. • Produce technical documentation, interface documentation, and design artifacts. • Support software maintenance, enhancements, and modernization initiatives. Required Qualifications • 3+ years of software development experience (Senior level: 5+ years preferred). • Strong experience with Java and/or modern C++ (C++17 or newer). • Experience developing software in Linux environments. • Experience with the Qt Framework for GUI development. • Experience using Git for source control. • Understanding of object-oriented design and software engineering principles. • Experience across the full Software Development Lifecycle (SDLC). • Strong debugging, troubleshooting, and analytical skills. • Excellent verbal and written communication skills. Preferred Qualifications • Experience with Bash scripting. • Familiarity with Visual Studio Code, vi/vim, or similar development tools. • Experience with software integration and automated build environments. • Exposure to AI-assisted development tools. • Experience supporting federal or aviation-related software projects. Education • Bachelor's degree in Computer Science, Software Engineering, Computer Engineering, or a related technical discipline.