GNC Simulation Engineer II

Relativity Space; Long Beach (CA); On-site; USD 126,000 - 172,500; Full time

Benefits offered by this job

Competitive salary and equity

Generous PTO and sick leave policy

Annual learning and development stipend

Job summary

Relativity Space in Long Beach is seeking a talented engineer to contribute to the 6DOF simulation for GNC algorithm development. This role involves integrating subsystem models and developing high-performance simulations.

The ideal candidate will hold a degree in engineering or physics and have at least 2 years of relevant experience. We offer a competitive salary of $126,000–$172,500, generous benefits including PTO, equity, and more.

Qualifications

• 2 years of relevant full-time work experience in aerospace or related fields.
• Experience developing simulations for aerospace vehicles required.
• Willingness to work independently on complex projects.

Responsibilities

• Contribute to 6DOF simulation for GNC algorithm development.
• Integrate subsystem models into the 6DOF simulation.
• Implement numerical solvers and physics models.

Skills

Proficiency with compiled languages (C, Rust)

Proficiency with scripted languages (Python)

Experience with physics-based simulations

Ability to work in a fast-paced environment

Ownership of end-to-end solutions

Education

Undergraduate or graduate degree in engineering, physics, mathematics

Tools

Docker

High-performance computing (HPC)

Job description

About the Team

The Guidance, Navigation, and Control (GNC) and Performance teams are responsible for defining and analyzing how Terran R flies, from liftoff to landing. The work combines a variety of disciplines such as advanced modeling, orbital mechanics, software development, and dynamic systems to optimize every phase of flight. You’ll develop flight algorithms, simulate trajectories, and model Terran R’s dynamic behavior across mission profiles. You’ll own critical pieces of the system, influence design, and see your work fly. The department is part of the Integrated Performance team, uniting key disciplines to drive performance at every stage of the mission.

About the Role

• You will be a key contributor to the 6DOF simulation used for GNC algorithm development, Monte Carlo analysis, and hardware-in-the-loop (HITL) testing.
• Work with analysis and hardware teams to develop and integrate subsystem models into the 6DOF simulation.
• Implement numerical solvers and physics models.
• Develop simulation configuration, scheduling, logging, and Monte Carlo capabilities.
• Develop simulation interfaces with GNC algorithms.
• Maintain and improve the development environment for simulation users.
• Contribute to other cross‑functional software packages at Relativity.

About You

• An undergraduate or graduate degree (BS/MS/PhD) in engineering, physics, mathematics or related disciplines.
• 2 years of relevant full‑time work experience.
• Proficiency with compiled (e.g. C, Rust) and scripted (e.g. Python) languages.
• Experience developing physics‑based simulations of aerospace vehicles.
• Ability to work in a fast paced and intense startup environment.
• Ability to complete projects with ownership of end-to-end solutions with a high degree of independence.

Nice to haves but not required

• Familiarity with the design and analysis of launch vehicles or space systems.
• Experience developing aerospace vehicle simulations that interface with GNC algorithms and/or hardware-in-the-loop (HITL) testing.
• Experience implementing high-performance computing (HPC) solutions.
• Experience implementing software development practices and workflows such as Docker, continuous integration (CI), and continuous deployment (CD).

Compensation

Hiring Range: $126,000–$172,500 USD

Relativity Space offers competitive salary and equity, a generous PTO and sick leave policy, parental leave, an annual learning and development stipend, and more! To see some of the benefits and perks we offer, please visit here.

Equal Opportunity Employer

We are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.

Reasonable Accommodation

If you need a reasonable accommodation, please contact us at .