Software Engineer - Simulation Integration and Test

York Space Systems; Greenwood Village (CO); On-site; USD 110,000 - 160,000; Full time

Job summary

York Space Systems seeks a talented Software Engineer to join the Simulation, Integration and Test Department. You will write models for spacecraft dynamics, avionics interfaces, and telemetry, ensuring accuracy for regression testing.

Collaborate with Systems Architecture and FSW teams as new vehicle components come online, building simulators to match real hardware behavior. You will develop and maintain the physics simulator, improve model fidelity and runtime performance, and validate that

Qualifications

• Bachelor's degree or higher in a relevant field.
• 2+ years of software engineering experience.
• Proficiency in Python and C++.
• Experience with Linux environment and bash scripting.
• Proficiency with Git and modern Agile development practices.

Responsibilities

• Develop and maintain the physics simulator with higher fidelity and performance.
• Create new simulation capabilities aligned with evolving vehicle components.
• Author and integrate mission test scenarios including fault cases.
• Build and maintain interface emulator logic.
• Model telemetry for meaningful regression testing.
• Support hardware interface development and SIT/CI/CD practices.
• Collaborate with Systems Architecture and FSW teams on component development.
• Document models, validation records, and user guides.

Skills

Python

C++

Linux

Bash scripting

Git

Agile methodologies

Education

Bachelor's degree or higher in Aerospace Engineering, Mechanical Engineering, Physics, Computer Science, or related field

Tools

GitLab CI/CD

Docker

Job description

York is seeking a talented and enthusiasticSoftware Engineer to join theSimulation, Integration and Test Department with a passion for launching hardware into space and a desire to revolutionize the space industry. Our ideal candidate thrives in a highly collaborative environment and enjoys finding ways to innovate and make processes more efficient.

This team builds new simulation capabilities, proves they are correct, and authors the mission scenarios that exercise them.In this role you will write the models that stand in for a real spacecraft, including the dynamics, the avionics interfaces, and the telemetry, and you willbe responsible fortheir accuracy. When a regression test passes against your simulator, the flight software team needs to be able to trust that result. You will work closely with the Systems Architecture and FSW teams as new vehicle components come online, building the simulation capability to match andvalidatingthat it behaves the way the real hardware does.

Responsibilities

• Develop andmaintainthe physics simulator, improving both model fidelity and runtime performance
• Develop new simulation capabilities in step with new vehicle components, andvalidatethat they model real behavior correctly
• Author, develop, and integrate mission test scenarios, including fault and off-nominal cases
• Build andmaintaininterface emulator logic
• Model telemetry accurately enough to support meaningful regression testing
• Support and extend development targeting thehardwareinterface with the simulation environment
• Collaborate with the Systems Architecture and FSW teams on newcomponentdevelopment
• Collaborate withotherteams on simulation health
• Support internal users directly and incorporate their feedback into the simulation models
• Follow SIT software development processes to ensure fast and quality releases
• Implement software development, testing, and CI/CD practices that meet division and department standards for software
• Develop andmaintainproduct documentation, user guides, and model validation records

Required Qualifications

• Bachelor's degree or greater in Aerospace Engineering, Mechanical Engineering, Physics, Computer Science, or related field
• 2+ years of experience in software engineering or a related field
• Demonstrated development experience in Python and C++
• Working knowledge of physics-based modeling, numerical methods, or control systems
• Demonstratedproficiencyin a Linux environment and with bash scripting
• Demonstratedproficiencywith Git and modern Agile software development practices and tools

Preferred Qualifications

• Coursework or experience in orbital mechanics, attitude dynamics, or GN&C
• Experience emulating hardware interfaces or spacecraft bus protocols such as CAN, SpaceWire, or RS-422
• Experience writing performance-sensitive simulation or real-time software
• Experiencevalidatingmodels against test or flight data
• Experience designing and working with APIs
• Familiarity with spacecraft flight software and avionics architectures
• Experience with Docker and containerization
• Experience with CI/CD pipelines, especially GitLab CI/CD
• Experience with Software-in-the-Loop (SITL) and/or Hardware-in-the-Loop (HITL) test systems
• Experience in end-to-end, system-level automated testing
• Experience with agentic or AI-assisted software development workflows
• Ability tointerface withand handle flight hardware
• Familiarity with the space domain and satellite operations
• Networking concepts like UDP/TCP
• Active Top Secret security clearance or ability to obtain