We are seeking a Senior Software Engineer to provide technical leadership, full software development life cycle (SDLC) expertise, and mentoring in the development of an Operator/Maintainer Training System. In this high-impact role, you will support the development of a new virtual training system while maintaining compatibility with existing software product line architectures and compliance with industry standards, to include CIGI and DIS.

As a Senior Software Engineer, you are more than a developer; you are a hands-on technical leader who guides the efficient evolution of our software baselines. You will lead multi-disciplinary teams through the full SDLC, ensuring that newly developed training products and capabilities leverage capabilities of legacy software systems built in Java, Ada, C++, or mixed-language codebases while avoiding unnecessary technical debt and maximizing future extensibility.

The position will be onsite in Orlando, FL.

Key Responsibilities

• Lead large-scale technical efforts across multiple teams, making critical decisions on architecture, design, and technology choices.
• Design and build complex simulation frameworks and virtual training environments, integrating hardware-in-the-loop (HITL) platforms and advanced graphical user interfaces.
• Develop and maintain mission-critical applications while driving modernization and new feature development in C/C++.
• Develop high-fidelity models for devices and associated synthetic environment elements utilizing mathematical modeling and numerical methods to ensure simulation accuracy.
• Act as a role model and mentor for mid-level and junior engineers, fostering a culture of continuous improvement and technical excellence.
• Collaborate with Systems Engineering, Test Automation, and customers to translate mission requirements into verifiable software solutions.

 

Basic Qualifications:

• Bachelor’s degree in a STEM discipline with 8+ years of experience; or a Master’s degree with 6+ years; or a PhD with 4+ years.  Domain-specific expertise in virtual training systems, game engines, or visual modeling is particularly applicable.
• US citizenship; Active DoD Secret Security Clearance or the ability to obtain a DoD Secret Security clearance.
• Expertise in Ada and C/C++ for complex, real-time embedded or distributed systems.
• Proven experience with real-time systems and virtual training device integration.
• Demonstrated ability to lead software development efforts and deliver complex solution architectures independently.

Preferred Qualifications

• Experience with Common Image Generator Interface (CIGI) 
• Familiarity with Distributed Interactive Simulation (DIS) or High-Level Architecture (HLA) standards.
• Familiarity with visual modeling.
• Familiarity with the Unity game engine.
• Working knowledge of Agile/Scrum methodologies and DevSecOps pipelines.

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.

Original Posting:

February 20, 2026

Pay Range:

Pay Range $107,900.00 - $195,050.00

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.