Fluidics Systems Engineer

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.