Software Engineer II, Model and Simulation

Katalyst Space Technologies; Broomfield (CO); On-site; USD 120,000 - 165,000; Full time

Benefits offered by this job

Relocation bonus

Employee stock options

Comprehensive medical, vision, and den

Unlimited Paid Time Off

Job summary

Katalyst Space Technologies develops robotic spacecraft for dynamic space operations, enabling routine maneuvering, refueling, upgrades, and exploration. We seek engineers skilled in modeling, simulation, and software integration to advance ITAR-compliant space systems.

Join a mission-driven team that values craftsmanship, ownership, and rigorous testing across aerospace domains. Strong C++/Python expertise and a physics/CS background are essential for this role.

Qualifications

• 3–8 years of experience in modeling and simulation for complex aerospace missions.
• Expert knowledge in C++ and Python.
• Owned at least one area of a software product.
• Experience developing for multiple internal stakeholders such as AI&T, GSW, MOPS, FSW, etc.
• Knowledge of distributed compute frameworks.

Responsibilities

• Create models and simulations for cross-domain uses.
• Build training environments for operations.
• Develop AI&T testing tool suite to aid SITL testing.
• Maintain and create the coding environment.
• Verify models and simulations against hardware.

Education

BS in Aerospace Engineering, Physics, Computer Science or closely related STEM field

Tools

C++

Python

Job description

Katalyst Description

We build robotic spacecraft that enable dynamic space operations, creating a futurewhere maneuvering, upgrading, refueling, and exploration are as routine as they are onEarth. Getting to space and overcoming the gravity well is only half the story. What youdo there is the future. We are not building the trains. We arebuilding the machines thatlay down the tracks. By developing the foundational capabilities that make sustained,responsive operations possible, we enable a new era of space activity that strengthensnational security and ensures freedom of action in an increasingly contested domain.

Katalyst Culture

Working at Katalyst is intense, hands-on, and deeply rewarding. You’ll take real ownership and see your work move from concept to operations in an environment where the problems are hard and the impact is real. We value humility, craftsmanship, and doing things the right way, even when it’s harder. You’ll work closely with thoughtful, driven teammates who push each other to do their best.

What You’ll Do

• Help create models and sims for cross domain uses
• Create training environment for operations
• Create AI&T testing tool suite to aid in SITL testing
• Maintain and createcoding environment
• Verify model and sims against hardware

What We’re Looking For

Required

• 3-8 Years ofexperiencein modeling and simulationfor complex aerospace missions
• Expert knowledge in C++ and Python
• Owned at least one area ofa software product
• Experience developing for multiple internal stakeholders such as AI&T, GSW, MOPS, FSW,etc
• Knowledge of distributed compute frameworks
• BS in Aerospace Engineering, Physics, Computer Science or closely related STEM field

Your Ideal Background

Preferred

• Experiencesimulating in6-DOF relative motion and RPOC
• Contributed toprevious digital twin efforts
• Strong foundation in multiple subsystems such as GNC, Flight Dynamics, EPS, Propulsion,etc
• Previous experience in simulations frameworks such asBasalisk, STK, GMAT
• Strong foundation in multiple subsystems such as GNC, Flight Dynamics, EPS, Propulsion,etc

Additional Requirements

Must be willing to work extended hours and weekends as needed.

Compensation and Benefits

Your 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, and experience. The anticipated salary range for this role is $120,000 - $165,000 annually.

Base salary is just one part of your total rewards package at Katalyst. You will also be eligible for long-term incentives, in the form of the Employee Stock Option and Equity Plan, as well as a relocation bonus and other discretionary bonuses. You will also receive access to comprehensive medical, vision, and dental coverage, and unlimited Paid Time Off.

At Katalyst our work on projects involving the U.S. Department of Defense requires adherence to International Traffic in Arms Regulations (ITAR), 22 C.F.R. Parts 120-130, which requires compliance with U.S. export laws before allowing employees to perform certain positions. Currently, our available roles necessitate access to ITAR-controlled information, and as a result, Katalyst would have to ensure any non-US person is authorized access to ITAR information before the commencement of employment. We are committed to equal employment opportunities and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, or national origin.