Software Engineer II, Spacecraft Simulation

Spacecraft Simulation Software EngineerTrue Anomaly delivers decisive capabilities for space superiority. We build autonomous spacecraft, advanced payloads, mission software, and space-based interceptors — enabling the U.S. and its Allies to secure the space environment and counter threats from the ultimate high ground.Software bridges the gap between military objectives, theoretical physics, and the human and autonomous control of spacecraft and ground systems. True Anomaly is seeking a Spacecraft Simulation Software Engineer to contribute to the continuing evolution of our spacecraft, constellation modeling, and simulation software with a focus on multi-physics, high-fidelity simulation.You will work in a fast-paced, interdisciplinary team to identify, develop, and deliver algorithms for modeling complex coupled physics including 6-degree-of-freedom (6DOF) rigid body dynamics, thermal systems, attitude dynamics and control, power systems, propulsion, and their interactions. This role focuses on building the simulation infrastructure that enables engineers to design spacecraft, validate control algorithms, analyze system performance, and predict mission outcomes with high confidence.ResponsibilitiesWrite well-structured, efficient code using modern C++ best practices (C++ 17 / C++ 20), with a particular emphasis on performance and maintainabilityDevelop and maintain multi-physics simulation libraries for spacecraft systems modeling including:6DOF rigid body dynamics with environmental perturbations (gravity gradient, solar radiation pressure, atmospheric drag, magnetic torques)Thermal modeling including conduction, radiation, and solar heatingAttitude dynamics and control system simulationPropulsion system modeling (thrusters, tanks, mass properties)Power generation and distribution (solar arrays, batteries, loads)Sensor and actuator models (reaction wheels, star trackers, gyros, magnetometers, thrusters)Implement coupled physics algorithms that capture interactions between subsystems (thermal-structural, power-thermal, propulsion-dynamics, etc.)Design and implement time-stepping algorithms, solver architectures, and integration schemes for real-time and faster-than-real-time simulationMaintain libraries that provide APIs in multiple languages (Python, C++) to other applications within True AnomalyWork with other internal teams who leverage our simulation APIs to plan and execute missions, develop advanced algorithms for spacecraft operation, and perform trade-space analysesParticipate in code reviews, architectural discussions, and sprint planning sessions to maintain high standards of software quality and adherence to project timelinesQualificationsBachelor's degree in aerospace engineering, mechanical engineering, computer science, physics, a similar discipline, or relevant experience1-3 years of professional experience in C++Experience with the Python programming language for scripting and prototyping applicationsStrong understanding of object-oriented software development practicesAbility to understand new challenges quickly, formulate a plan, get buy-in, and executeUnderstanding of complex distributed systems, and how the components you design and deliver will fit into those larger systemsExcellent problem-solving skills and attention to detailU.S. Citizen and eligible for DoD Secret or TS/SCI clearancePreferred Skills and ExperienceExperience developing physics-based modeling and simulation environments (i.e., modeling spacecraft dynamics, thermal systems, or control algorithms)Knowledge of numerical methods:ODE solvers and integration schemes (Runge-Kutta, etc.)Numerical linear algebra and matrix computationsSparse matrix techniquesExperience with spacecraft subsystems:Attitude determination and control systems (ADCS)Guidance, navigation, and control (GNC)Thermal control systemsElectric power systems (EPS)Propulsion systemsUnderstanding of coordinate frames and transformations (ECI, ECEF, body frame, etc.)Experience with quaternion mathematics and rotation representationsKnowledge of orbital mechanics and perturbation forcesFamiliarity with model validation, verification, and uncertainty quantificationExperience with version control systems (Git) and CI/CD pipelinesCompensationBase Salary: $90,000 - $140,000Equity + Benefits including Health, Dental, Vision, HRA/HSA options, PTO and paid holidays, 401K, Parental LeaveYour actual level and base salary will be determined on a case-by-case basis and may vary based on the following considerations: job-related knowledge and skills, education, location, and experience.Additional RequirementsWork Location—This is a fully onsite role. Candidates must be based in or able to commute to our Denver or Long Beach office daily.Work environment—the work environment; temperature, noise level, inside or outside, or other factors that will affect the person's working conditions while performing the job.Physical demands—the physical demands of the job, including bending, sitting, lifting and driving.This position will be open until it is successfully filled.