Aeronautical Engineer

We live under a new world order. To protect Europe and its allies we're building a new defense prime. One tailored for the era of autonomous warfare.

While building for the future, our culture emulates the defense industry's roots: mass scale; operational excellence; execution speed; rapid technology adoption.

To strive for this we combine expertise in autonomy, electronic warfare and rapid manufacturing. Paired with young, passionate and mission driven engineering and technical talent.

We have offices in Athens & London.

As Delian's Aeronautical Engineer, you'll play a central role in helping us build the products redefining warfare. From concept to production. This will primarily involve building fixed-wing UAVs, but also supporting our field operations.

This role is based in Athens.

• Design, develop, and optimize fixed-wing UAV, from concept through prototype to production.

• Perform aerodynamic analysis and optimization using CFD tools to improve lift, drag, and stability performance.

• Develop detailed 3D models and engineering drawings using CAD software (SolidWorks or equivalent).

• Integrate electrical circuits, avionics, sensors, and autopilot systems (ArduPilot/Pixhawk or equivalent).

• Apply knowledge of additive (3D printing, composites) and subtractive (CNC machining, milling, lathing) manufacturing methods for prototyping and production.

• Build, assemble, and test airframes and subsystems, ensuring airworthiness and performance against design goals.

• Conduct flight testing and data analysis, troubleshooting aerodynamic or systems issues.

• Drive the transition from prototype development to scalable production.

• Maintain compliance with safety, quality, and regulatory standards for UAV development and operations.

• Support field operations as a licensed UAV pilot with hands-on experience flying fixed-wing aircrafts.

• Bachelor's or Master's degree in Aeronautical/Aerospace Engineering or a related discipline.

• Proven experience in designing and developing fixed-wing aircraft (UAV or manned).

• Strong background in aerodynamics, propulsion, and flight mechanics.

• Proficiency in CFD analysis and CAD modeling.

• Understanding of electrical circuits, power systems, and avionics integration.

• Hands-on experience with ArduPilot (tuning, mission planning, hardware integration).

• Knowledge of manufacturing methods (composite fabrication, 3D printing, CNC machining).

• Track record of building prototypes and advancing to production-ready designs.

• Know how to fly fixed-wing UAVs (and willing to get a license after joining us).

• Experience in weight optimization, payload integration, and endurance improvement.

• Exposure to defense, aerospace, or UAV regulatory environments.

• Strong problem-solving, documentation, and teamwork skills.