Navigation Engineer (Simulation Software)

Navigation Engineer (Simulation Software) About Logos Space Logos Space is building a proliferated Low Earth Orbit (pLEO) constellation to deliver resilient, high-performance connectivity to enterprise and government users worldwide. As part of that effort, the Navigation team is designing and building the software and infrastructure for spacecraft timing, astrodynamics, maneuver planning, orbit determination, and related navigation workflows used across flight and ground systems. Position Summary The Navigation team at Logos Space is assisting in developing a constellation-level software framework to model, test, validate, and operate our proliferated LEO constellation as a dynamic space network. This role focuses on building the software infrastructure that connects spacecraft navigation state, mission geometry, link availability, network topology, routing behavior, operational constraints, and software-defined networking workflows into a scalable constellation-level test and analysis environment. In this role, you will help build the framework for testing how the constellation behaves as a dynamic network, including spacecraft motion, contact geometry, inter-satellite and ground-link availability, timing behavior, coverage, latency, routing constraints, topology changes, and network control behavior. The framework will support engineering trades, network validation, operational rehearsals, anomaly reconstruction, “what-if” analysis, and stakeholder-facing visualization. In this role, you will develop the software infrastructure that turns navigation products, spacecraft telemetry, predicted ephemerides, network configuration, and mission constraints into a usable constellation-level representation of system behavior. You will work closely with navigation, flight software, ground software, networking, mission operations, product, and systems engineering teams to define interfaces, build scenario tooling, validate network behavior, and make this framework an engineering-quality capability rather than a static visualization. We are looking for engineers who can work well in a fast-paced environment, turn incomplete requirements into practical software, and build constellation-level infrastructure that is technically rigorous, scalable, and usable across engineering and operations teams. Responsibilities Develop and maintain C++ and Python software for the Logos constellation-level software framework. Build constellation-scale infrastructure that combines spacecraft ephemerides, mission geometry, timing behavior, link availability, ground assets, network topology, routing state, and operational constraints. Develop software services that ingest, generate, and distribute navigation-derived state products used by the framework, including propagated trajectories, time-tagged spacecraft states, contact geometry, link windows, coverage products, and mission event timelines. Support modeling and testing of software-defined networking behavior, including routing state, link-state changes, handovers, path availability, latency, throughput constraints, degradation modes, and network recovery behavior. Build scenario generation tools for constellation deployment, nominal operations, planned maneuvers, ground contacts, network outages, spacecraft degradation, regional demand changes, maintenance windows, and mission-critical “what-if” cases. Develop capabilities that allow the team to simulate future constellation behavior, reconstruct past events, compare predicted and observed behavior, and support anomaly investigations. Build user-facing dashboards, visualization tools, and 2D/3D constellation viewers that allow engineers, operators, and stakeholders to inspect constellation state, link availability, routing behavior, coverage, latency, and network performance. Develop scalable simulation and data-processing infrastructure capable of handling many spacecraft, many links, long time horizons, and repeated scenario sweeps. Define data models, message schemas, configuration formats, scenario definitions, telemetry interfaces, and validation workflows for framework inputs and outputs. Build validation infrastructure, including unit tests, integration tests, regression tests, deterministic replay, scenario comparison tools, performance benchmarks, and independent cross-checks against trusted analysis tools. Work closely with navigation, astrodynamics, networking, flight software, ground software, mission operations, systems engineering, and product teams to define clean interfaces and integrated workflows. Support integrated test campaigns, operational rehearsals, constellation performance analysis, commissioning, flight-data investigations, and anomaly response as needed. Basic Qualifications Bachelor’s degree in Aerospace Engineering, Computer Science, Electrical Engineering, Applied Mathematics, Physics, or a related STEM field, or equivalent practical experience. 5+ years of relevant professional experience building simulation software, constellation software, distributed systems, network simulation, astrodynamics software, spacecraft operations software, or other high-reliability engineering software. Strong graduate research or project experience may substitute for some professional experience. Proficiency in modern C++ and/or Python for production software development. Experience building scalable software systems that combine simulation, data processing, APIs, visualization, and automated validation. Working knowledge of orbital mechanics, spacecraft ephemerides, coordinate frames, time systems, mission geometry, or similar dynamic system modeling fundamentals. Experience modeling or analyzing network behavior, routing, link availability, latency, throughput, topology changes, or distributed system performance. Experience building scenario generation, replay, regression, or automated test infrastructure. Experience with Linux-based development environments, Git, and automated testing. Strong written and verbal communication skills. Preferred Qualifications 8+ years of relevant experience and the ability to independently own technical workstreams. Master’s degree or PhD in Aerospace Engineering, Computer Science, Electrical Engineering, Applied Mathematics, Physics, or a related field with specialization in astrodynamics, distributed systems, networking, simulation, or spacecraft operations. Experience building constellation-level mission modeling, satellite networking, operational analysis, or large-scale simulation software. Experience with LEO communication constellations, inter-satellite links, ground networks, dynamic routing, SDN, handover behavior, coverage analysis, or latency and throughput modeling. Experience with software-defined networking, routing protocols, link-state systems, network orchestration, traffic modeling, or distributed network control planes. Experience with visualization frameworks. Experience with astrodynamics and mission simulation tools. Experience integrating simulation environments with flight software, ground software, network testbeds, hardware-in-the-loop systems, or mission operations systems. Familiarity with CCSDS data formats, spacecraft command and telemetry systems, mission planning interfaces, or ground-to-flight software interfaces. Ability and willingness to obtain and maintain a U.S. Government Security Clearance. Even if you don’t meet every qualification, we encourage you to apply. We value strong fundamentals, sound judgment, and growth potential, and we know great candidates do not always match every item on a job description. Additional Information Logos Space is an equal opportunity employer and values creativity, curiosity, and diverse perspectives. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, national origin, age, disability, veteran status, marital status, or any other status protected by applicable law. Employment offers are contingent on the candidate’s ability to access export-controlled information in accordance with U.S. law.