Visualization & Simulation Software Engineer (Geospatial/RF Systems)

FTS International, LLC•Chantilly, VA

49d•$90,000 - $120,000•Onsite

About The Position

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.

Requirements

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, WebSockets, client-server architecture)

Nice To Haves

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

Responsibilities

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 (WebSockets, 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