GNC Simulation Engineer II

Posted 10 Days Ago
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Long Beach, CA
Hybrid
136K-173K Annually
Junior
3D Printing • Aerospace • Hardware • Robotics • Software • Manufacturing
We are building the future of aerospace.
The Role
The GNC Simulation Engineer II will develop and operate high-fidelity simulations for rocket performance, interfacing with software and hardware teams, and implementing numerical solvers.
Summary Generated by Built In

At Relativity Space, we have two audacious goals: to build the next great commercial launch company with Terran R and to become America's leading force in additive manufacturing innovation. Both contribute to our long-term vision of creating humanity’s industrial base on Mars, paving the way for interplanetary life to expand the possibilities of the human experience. This journey begins right here on Earth – where we design, build, and fly rockets to deliver customer payloads to orbit. Terran R, our medium-to-heavy lift reusable rocket, fulfills the growing demand for launch capacity, thanks to our iterative approach that accelerates design, testing, and development while minimizing costs. While our groundbreaking research and development in 3D printing pushes the boundaries of large-scale additive manufacturing.

Your journey with us is more than just a job – it’s an opportunity to shape the future of aerospace technology, additive manufacturing, and the human experience alongside a community of passionate, creative individuals. Join us on this extraordinary journey, as we work together to transform our vision into reality.

About the Team: 

Relativity’s Integrated Performance teams ensure that our products work across all systems and disciplines, from trajectory design to aerodynamics to reliability analysis and beyond. Our groups size the Terran R rocket, design its missions for customer success, reliability, and reusability, and ensure that every system on the rocket and ground is engineered correctly for the demanding environments of launch and entry. Recently, we completed the preliminary design and analysis of Terran R including Relativity’s first-ever work on launch vehicle reusability, spanning advanced trajectory simulations, wind tunnel testing, and structures analysis, among many other projects.

The GNC Simulation team within the Integrated Performance group develops and operates the highest-fidelity six degree-of-freedom simulation of the launch vehicle. This simulation is used for Guidance, Navigation, and Control (GNC) algorithm development, hardware-in-the-loop testing, and vehicle performance analysis. The team strives to build tight integrations between the tools developed across the entire company to support rapid design cycles and enable effective design trades and studies.

About the Role:

  • Interfacing with cross-disciplinary software and hardware teams to drive software requirements
  • Interfacing with analysis groups to drive simulation development
  • Developing simulation configuration, scheduling, logging, Monte Carlo, and visualization capabilities
  • Scaling our simulation to support multiple vehicle configurations and missions
  • Implementing numerical solvers and physics models
  • Developing simulation interfaces with GNC algorithms
  • Maintaining and improving the development environment for simulation users

About You:

  • An undergraduate or graduate degree (BS/MS/PhD) in engineering or related discipline
  • 2+ years of software engineering experience
  • High proficiency with compiled (e.g. C++, Rust) and scripted (e.g. Python) languages
  • Experience developing high-performance simulations of aerospace vehicles (rockets, satellites, aircraft, etc.)
  • Experience developing simulation interfaces with hardware-in-the-loop (HITL) testing
  • Experience implementing software development practices and workflows such as Docker, continuous integration (CI), continuous deployment (CD), and AWS

Nice to haves but not required:  

  • Ability to work in a fast-paced and intense start-up environment
  • Ability to complete projects with ownership of end-to-end solutions with a high degree of independence
  • Prior work in a startup or agile development environment

At Relativity Space, we are committed to transparency and fairness in our compensation practices. Actual compensation will be determined based on experience, qualifications, and other job-related factors.
Compensation is only one part of our total rewards package. 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 & perks we offer, please visit here.

Hiring Range:

$136,000$173,000 USD

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.

Top Skills

AWS
C++
Docker
Python
Rust

What the Team is Saying

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The Company
HQ: Long Beach, CA
1,300 Employees
Hybrid Workplace
Year Founded: 2016

What We Do

Welcome to Relativity Space, where we're rewriting the rules of rocketry. We have built and launched the world’s first 3D printed rocket, Terran 1, and are now bringing to market Terran R, our reusable medium-to-heavy-lift launch vehicle. Our iterative development approach revolutionizes the process from design to flight, ensuring we can scale to meet customer needs.

Our focus is clear: provide exceptional launch services that are highly competitive in the market. We design and manufacture cost-effective, high-performance, and reusable rockets at an unprecedented pace and scale – setting a new industry standard.

At Relativity Space, we have two audacious goals: build the next great commercial launch company with Terran R, and become America’s leading force in additive manufacturing innovation. Both ladder up to our long-term vision of creating humanity’s industrial base on Mars, paving the way for interplanetary life to expand the possibilities of the human experience. That journey begins right here on Earth—designing, building, and flying rockets to deliver customer payloads to orbit.

A medium-to-heavy lift reusable rocket, Terran R is designed to meet the ever-growing need for launch capacity. Our iterative approach accelerates the design, test, and development processes, enabling high-volume performance and reliability, with lower costs and shorter time to market. Our 3D printing research and development is at the bleeding edge, setting the standard for a new era of large-scale additive manufacturing.

Why Work With Us

We believe in a future where interplanetary life fundamentally expands the possibilities for the human experience. In realizing this, our long-term goal is to create humanity’s industrial base on Mars. The first step toward this long-term vision starts here on Earth – building rockets and pushing the boundaries of additive manufacturing.

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Relativity Space Teams

Team
Launching the Future of Humanity in Space
About our Teams

Relativity Space Offices

Hybrid Workspace

Employees engage in a combination of remote and on-site work.

Given the dynamic nature and diversity of roles at Relativity Space, there is no one-size-fits-all approach for how every team works best.

Typical time on-site: Flexible
HQLong Beach, CA
Cape Canaveral, FL
Center, MS
Kent, WA
Washington, DC
Learn more

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