Darwin Space are currently hiring for a Fluidics Systems Engineer on behalf of a business in Madrid.

Responsibilities

- Continued mechanical and functional development of the ATHENA PMU, including reliability improvements and production-readiness work.
- Developing and qualifying the in-vacuum propellant filling setup, including outgassing protocols, contamination control and fill calibration procedures.
- Characterising PMU performance: flow delivery, pressure stability, gas management and fill accuracy.
- Writing and maintaining test procedures, assembly instructions and qualification documentation.
- Working closely with the thruster and power electronics teams during integrated testing and firing campaigns.
- Contributing to make-vs-buy decisions and supplier interactions for PMU components.

Qualifications & Skills

- Background in vacuum systems engineering, precision fluidics, analytical instrumentation, or a closely related field, demonstrated either through industry experience or research.
- Hands-on experience handling sensitive or reactive liquids (hygroscopic, conductive,



or corrosive media) in a laboratory or production context.
- Familiarity with vacuum hardware: pumping systems, pressure measurement at low ranges, outgassing characterisation, leak detection.
- Experience designing or assembling precision sealed systems (seals, fittings, polymer-to-metal interfaces).
- Rigorous experimental habits: clear documentation, awareness of contamination sources, systematic troubleshooting.
- Comfortable working in a small team where the scope of your role will evolve.
- Proficiency in mechanical CAD (Fusion 360, SolidWorks, or equivalent).
- Direct experience with ionic liquids or electrochemical systems.
- Familiarity with space environmental requirements (thermal vacuum, ECSS or NASA outgassing standards).
- Experience with low-pressure pneumatic proof testing and pressure system compliance.
- Background in microfluidics, MEMS, or lab-on-chip systems.

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📌 Fluid Systems Engineer (Madrid)
🏢 Darwin Recruitment
📍 Madrid