Propulsion Design Engineer, Propulsion (m/f/d) (Rocket Propulsion)

Location: Parsdorf, Bavaria, Germany

Company

hirify.global is a privately funded aerospace company developing sustainable launch solutions for small and medium-sized satellites and constellations in Low Earth Orbit.

What you will do

• Develop and maintain modular engine and fluid-system models for existing, conceptual, and future rocket engines.
• Coordinate component model characterization with product owners and maintain the component performance database.
• Provide engine load-point predictions during development and test campaigns and define engine performance acceptance criteria for flight and qualification tests.
• Develop tools to increase acceptance-testing cadence and provide engine performance metrics and uncertainty quantification for the Guidance, Navigation and Control flight software team.
• Maintain characteristic engine parameters, transient lookup tables, and secondary models for rocket kinematics, including thrust from chilldown bleed flows and purges.
• Define sensor requirements and uncertainty propagation for engine performance verification across development testing, stage testing, and flight.

Requirements

• M.Sc. degree in mechanical engineering, aerospace engineering, or a similar field.
• Exceptional knowledge of thermodynamics and rocket motor system architecture, including subsystem interactions.
• Knowledge of measurement technology and stochastic analysis, including uncertainty quantification and propagation.
• Fundamental understanding of combustion, thrust chambers, valves, and turbopump systems.
• Proven experience developing and validating empirical, semi-empirical, or analytical models and setting up cycle models for complex fluid systems or machinery.
• Effective collaboration in multidisciplinary and cross-functional teams, with an organized, detail-oriented, and proactive working style.
• Ability to adapt to shifting priorities.
• Driven attitude, eagerness to learn, and passion for New Space.
• Fluent English.

Nice to have

• Professional experience in rocket propulsion development.
• Experience with Simulink or cycle model development for rocket or aircraft engines or similar systems.
• Willingness to travel abroad to support engine test and launch campaigns.

Culture & Benefits

• Employee participation through a virtual company share program.
• 30 days of vacation.
• Company pension plan with a 20% employer contribution after the probation period.
• Subsidised lunches, rental clothing with laundry service, and sponsored sports club membership.
• Individual learning budget after the probation period and childcare allowance for non-school-age children.
• Flexible mobility budget with options including a Deutschlandticket, JobRad bicycle leasing, FINN JobAuto, or fuel allowance.