Visualization & Simulation Software Engineer (Geospatial/RF Systems)

International Executive Service Corps; Chantilly (VA); On-site; USD 90,000 - 120,000; Full time

Job summary

The International Executive Service Corps is seeking a Visualization & Simulation Software Engineer in Chantilly, VA. The role involves developing advanced 3D visualization tools for geospatial and RF systems. Candidates must have a BS in STEM and 5+ years of software development experience.

Applicants should possess strong skills in JavaScript and Three.js, along with proficiency in Python. This position requires the ability to obtain a TS/SCI with polygraph. Join us in delivering innovative solutions in a dynamic environment.

Qualifications

• 5+ years of software development experience.
• Experience in building real-time or near-real-time systems.
• Ability to obtain a TS/SCI with polygraph.

Responsibilities

• Design and develop real-time 3D visualization platforms.
• Build full-stack systems connecting simulation engines to clients.
• Optimize rendering performance for high object counts.

Skills

JavaScript/Typescript expertise

Three.js (WebGL)

Python proficiency

3D math and spatial reasoning

Algorithm development

Full-stack development

Education

BS STEM in engineering discipline

Tools

Python

WebSockets

APIs

Job description

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.

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.

Required Skills/Qualifications

• 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).

Desired Skills/Qualifications

• 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.