R&D Mechanical Engineer — Wind Tunnel Development

OneSec

Location: Istanbul, Türkiye

About OneSec:

OneSec is making food delivery 3 times faster and 10 times cheaper, by developing small AI powered delivery drones. Visit our website for more info: OneSec.com

Role Overview:

We’re looking for a hands-on R&D Mechanical Engineer to design and build a variable-angle wind tunnel for testing our VTOL delivery drones.

The wind tunnel will generate controlled wind speeds and directions while the aircraft remains mounted on a force-measurement test stand. The complete system will include motors, propellers, structural frames, airflow components, force sensors, actuators, and a large pivoting mechanism that allows the wind angle to be adjusted automatically.

This is a highly practical role involving CAD design, prototyping, fabrication, assembly, instrumentation, testing, and continuous improvement.

Key Responsibilities:

• Design the complete wind tunnel structure and airflow system

• Select and integrate motors, propellers, bearings, actuators, belts, gears, and structural components

• Develop a pivoting mechanism that can automatically change the wind tunnel angle

• Design test stands and fixtures for mounting VTOL aircraft

• Integrate force sensors and other measurement equipment into the test setup

• Create parts and assemblies in SolidWorks

• Produce components using 3D printing, CNC machining, sheet materials, and workshop fabrication

• Assemble, modify, and troubleshoot the physical system

• Conduct airflow, vibration, structural, and mechanical tests

• Work closely with flight-control and embedded-software engineers to integrate the wind tunnel into our verification pipeline

• Improve the system based on test results and experimental data

Qualifications:

• Degree in Mechanical Engineering, Aerospace Engineering, Mechatronics, or a related technical field

• Strong SolidWorks or equivalent CAD skills

• Experience designing and building mechanical systems or test equipment

• Familiarity with motors, propellers, bearings, belts, gears, actuators, and structural assemblies

• Experience with 3D printing, rapid prototyping, and workshop fabrication

• Comfortable using workshop tools such as drills, Dremels, saws, adhesives, and hand tools

• Good understanding of mechanical loads, vibration, tolerances, airflow, and structural design

• Experience with wind tunnels, test rigs, drones, robotics, or aerospace systems is a plus

• Strong problem-solving skills and a practical, hands-on approach

Why You’ll Love Working Here

• Design and build a unique variable-angle wind tunnel from the ground up

• Work with an exceptionally talented team

• Work on cutting edge drone & AI technology

• Build real hardware and see it used in aircraft testing

• Good compensation

• Equity participation (Stock options)