Software Engineer I, Modeling and Simulation

Katalyst Space; Broomfield (CO); On-site; USD 90,000 - 125,000; Full time

Benefits offered by this job

Employee stock options

Relocation bonus

Comprehensive medical, vision, dental

Job summary

Katalyst Space is building robotic spacecraft to enable dynamic space operations, from maneuvering to refueling and exploration. We seek engineers who can model and simulate complex missions, convert data into code, and help create AI/testing tools for SITL validation.

Candidates should have 1–3 years in aerospace modeling, 2–3 years in C++/Python, and a BS in a STEM field. Base salary ranges from $90,000 to $125,000 plus incentives, with relocation support and comprehensive benefits.

Qualifications

• 1–3 years of modeling and simulation for complex aerospace missions.
• 2–3 years of experience in C++ and Python.
• Strong understanding of object‑oriented software development practices.
• Ability to understand new challenges quickly, formulate a plan, get buy‑in, and execute.
• Understanding complex distributed systems, and how the components you design and deliver will fit into those larger systems.
• Excellent problem‑solving skills and attention to detail.
• BS in Aerospace Engineering, Physics, Computer Science or closely related STEM field.

Responsibilities

• Help create models and sims for cross domain uses.
• Learn how to convert data sheets into code.
• Aid the team in creating AI& T testing tool suite to aid in SITL testing
• Maintain and create coding environment
• Verify model and sims against hardware

Skills

Modeling & simulation

C++

Python

OO programming

Problem solving

Education

B.S. in Aerospace Engineering, Physics, CS

Tools

Basalisk

STK

GMAT

Job description

Katalyst Description

We build robotic spacecraft that enable dynamic space operations, creating a future where maneuvering, upgrading, refueling, and exploration are as routine as they are on Earth. Getting to space and overcoming the gravity well is only half the story. What you do there is the future. We are not building the trains. We are building the machines that lay down the tracks. By developing the foundational capabilities that make sustained, responsive operations possible, we enable a new era of space activity that strengthens national 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
• Learn how to convert data sheets into code
• Aid the team in creating AI&T testing tool suite to aid in SITL testing
• Maintain and create coding environment
• Verify model and sims against hardware

Required

• 1‑3 Years of experience in modeling and simulation for complex aerospace missions
• 2‑3 years working in C++ and Python
• Strong understanding of object‑oriented software development practices
• Ability to understand new challenges quickly, formulate a plan, get buy‑in, and execute
• Understanding complex distributed systems, and how the components you design and deliver will fit into those larger systems
• Excellent problem‑solving skills and attention to detail
• BS in Aerospace Engineering, Physics, Computer Science or closely related STEM field

Preferred

• Experience simulating in 6‑DOF relative motion and RPOC
• Contributed to previous digital twin efforts
• Working knowledge in multiple at least one subsystem such as GNC, Flight Dynamics, EPS, Propulsion, etc
• Previous experience in simulation frameworks such as Basalisk, STK, GMAT
• Working knowledge of distributed compute frameworks

Additional Requirements

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

Compensation and Benefits

• Base salary: $90,000 – $125,000 annually (determined on case‑by‑case basis)
• Long‑term incentives: Employee Stock Option and Equity Plan
• Relocation bonus and other discretionary bonuses
• Comprehensive medical, vision, and dental coverage
• 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.