At Orbital Paradigm, we design, develop, manufacture, and operate reusable orbital logistics systems. Our spacecraft perform multiple orbital mission profiles and return safely to Earth through hypersonic atmospheric reentry and landing with pinpoint accuracy for rapid refurbishment and reuse.

Role Description

We are looking for a Junior Propulsion Engineer to support the design, development, integration, and testing of chemical propulsion systems for reusable orbital logistics vehicles.

The role focuses on HTP-based propulsion systems, including thrusters, tanks, feed systems, valves, regulators, pressurization systems, fluidic components, additive manufacturing, test hardware, and propulsion test campaigns. The engineer will work closely with propulsion, systems, GNC, avionics, mechanical, thermal, manufacturing, AIT, and quality teams to develop reliable spacecraft propulsion hardware from early design through testing.

This role is suited for an early-career engineer with strong fundamentals, hands-on project experience,



and clear motivation to work on spacecraft propulsion systems.

Key Responsibilities
- Support the design, development, and testing of HTP-based chemical propulsion systems.
- Assist with propulsion system architecture, sizing, trade studies, and component selection.
- Support the design of thrusters, tanks, feed systems, pressurization systems, valves, regulators, lines, fittings, and fluidic components.
- Contribute to CAD models, drawings, interface documentation, BOMs, and technical documentation.
- Support additive manufacturing activities for propulsion hardware, including design reviews, supplier coordination, inspection, and test preparation.
- Assist with propulsion analyses, including performance estimates, pressure drop calculations, thermal assessments, and operational scenario analysis.
- Support preparation and execution of propulsion test campaigns, including pressure tests, leak tests, functional tests, component tests, and ho

📌 Propulsion - Junior Propulsion Engineer (Madrid)
🏢 Orbital Paradigm
📍 Madrid