Unreal Engine C++ Developer

4+ months contract for an Unreal Engine C++ Developer in St. Louis, MO (hybrid 2-3 days onsite) ***We can Only consider US Citizens for this role*** Overview We are supporting a flight simulation and pilot training initiative focused on high-fidelity mission visualization and real-time simulation environments . This role is for a software engineer specializing in Unreal Engine (C++) , not a designer or artist. The developer will be responsible for implementing core simulation logic, system integrations, and real-time application functionality to support training, sensor visualization, and mission scenarios. Key Responsibilities Unreal Engine Development (C++ Focus) Develop and implement application logic using Unreal Engine with C++ (not Blueprint-only) Load and manage DLC/plugins containing large 3D asset libraries (aircraft, naval systems, civilian models, etc.) Optimize and manage rendering of large-scale environments and dynamic assets Implement level-of-detail logic (e.g., converting MASS entities to full actors based on range/visibility) Simulation & Systems Integration Implement and integrate simulation protocols including: DIS (Distributed Interactive Simulation) CIGI (Common Image Generator Interface) OMS (Open Mission Systems) Use protocol inputs to drive: Animation triggers Real-time simulation behavior Support proof-of-concepts and production implementations for simulation interoperability Develop UI components to support: Lat/Lon grid overlays on 3D globe environments User selections and highlighting Build integrations to: Export simulation data to external data science platforms Consume input from external remote control/configuration systems Networking & Multiplayer Systems Implement Unreal Engine networking features: Multiplayer replication State synchronization across multiple simulation instances Contribute to development of advanced simulation capabilities including: Photogrammetry-based environments and 3D terrain (Cesium) Building and infrastructure data integration IR (infrared) sensor simulation and dynamic material responses SAR (synthetic aperture radar) simulation Weather systems and synchronized multi-environment conditions Time-of-day and control integrations (e.g., HOTAS via CIGI) Enhance realism and fidelity (lighting, shadows, materials, environmental effects) Required Qualifications Must be a U.S. citizen 3+ years of hands‑on experience with Unreal Engine development using C++ Strong proficiency in C++ programming Experience building interactive, real‑time 3D applications Understanding of Actor systems and scene management Performance optimization in real‑time environments Ability to work as a software engineer (not a 3D artist or designer) Preferred / Differentiating Experience Experience with simulation standards: DIS, CIGI, OMS (or similar) Background in: Aerospace, defense, or simulation environments Real‑time data integration or visualization Familiarity with: Unreal networking and multiplayer systems Sensor simulation or physics‑based modeling What We Are NOT Looking For Blueprint‑only Unreal developers without strong C++ experience 3D artists, character modelers, or purely visual designers Success Profile The ideal candidate is a true software engineer who: Writes production‑grade C++ in Unreal Understands real‑time systems and simulation Can integrate external data and protocols into a live environment Is comfortable working in a complex, engineering‑driven simulation ecosystem #J-18808-Ljbffr Catapult Solutions Group