Visualization & Simulation Software Engineer; Geospatial​/RF Systems

FTS International, LLC (FTS) is committed to providing the Federal Government with quality consultants and support. To ensure mission success we focus on putting our customers first while minimizing corporate bureaucracy on our staff. We provide Subject Matter Experts (SME) free of Organizational Conflicts of Interest (OCI) focused on independent analysis and mission support services within the disciplines of Engineering, Counter Terrorism Operations, Management, Information Technology, Signals Analysis, Administration, Cyber Security and Linguistics.

FTS has an opportunity for a Visualization & Simulation Software Engineer (Geospatial/RF Systems) in Chantilly, VA.

The Visualization & Simulation Software Engineer (Geospatial/RF Systems) will develop advanced 3D visualization and simulation tools for geospatial, satellite, and RF-based systems.

• Design and develop real-time 3D visualization platforms using Three.js for:
  • Satellite orbits and trajectories
  • Antenna cones, beam patterns, and coverage volumes
  • Line-of-sight and obstruction modeling
• Build full-stack systems connecting Python-based simulation engines to web-based visualization clients (Web Sockets, APIs, streaming pipelines).
• Develop and optimize geometry and spatial algorithms, including:
  • Coordinate transforms (ECEF, ENU, azimuth/elevation)
  • Volume intersection
  • Visibility and occlusion detection
• Handle large-scale, time-dependent datasets (interpolation, streaming, preloading strategies).
• Optimize rendering performance for high object counts and real-time updates.
• Architect backend services for simulation, data ingestion, and preprocessing.
• Guide system design decisions and mentor junior engineers.

• US Citizen
• Ability to obtain a TS/SCI with polygraph
• BS STEM (Science, Technology, Engineering, or Math) in engineering discipline
• 5+ years of software development experience
• Strong expertise in JavaScript/Typescript and Three.js (WebGL)
• Strong proficiency in Python for simulation, numerical computation, or backend services
• Deep understanding of 3D math and spatial reasoning, including:
  • Vector math, coordinate systems, transformations
  • Spherical geometry and geospatial calculations
• Experience building real-time or near-real-time systems.
• Strong algorithm development and problem-solving skills, especially for geometry-heavy problems.
• Experience with full-stack development (REST APIs, Web Sockets, client-server architecture).

• TS/SCI with polygraph
• Experience with:
  • Satellite systems, orbital mechanics, or geospatial platforms
  • RF/antenna modeling or signal propagation
  • Scientific visualization or simulation systems
• Familiarity with:
  • PyVista, VTK, or similar for backend 3D processing
  • GPU concepts (shaders, GLSL, WebGPU)
• Experience with Dockerized deployments and production systems
• Background in physics, aerospace, or related technical domains

FTS International, LLC is an Equal Opportunity Employer - vets/disabled.