Mechanical/Mechatronic Development Engineer

Short Facts

Location: Zürich Oerlikon, Switzerland

Employment Type: Full-time

Working Mode: On-site

About Flexion

At Flexion, we’re building the intelligence layer powering the next generation of humanoid robots. Our mission is to accelerate the transition from fragile prototypes to real-world humanoid deployment. We are founded by leading scientists in robot reinforcement learning (ex-Nvidia, ex-ETH Zürich), and backed by leading international VC firms. In just months, we’ve gone from our first line of code to deploying real humanoid capabilities.

The Role

We are looking for an innovative and experienced Mechanical / Mechatronics Engineer to join our hardware team. In this role, you will be designing, prototyping, and testing advanced mechatronic systems for next-generation robots, including humanoids.

You will collaborate closely with multidisciplinary teams, including robotics controls, software infrastructure, and field testing, to ensure seamless integration of your designs into robotic systems. From concept and requirements definition through prototyping, testing, and final production, you will drive the full design lifecycle and contribute directly to shaping cutting-edge robotic hardware.

What You’ll Be Doing

• Design and develop mechatronic systems and components for robotic applications
• Create and refine 3D CAD models
• Prototype, test, and validate mechanical and mechatronic subsystems
• Work hands-on in the lab: building prototypes, running tests, and troubleshooting issues
• Collaborate cross-functionally to ensure successful system-level integration

• Bachelor’s or Master’s degree (FH/ETH) in Robotics, Mechatronics, or Mechanical Engineering.
• 5+ years of experience developing mechatronic products, from concept to production
• Strong proficiency in 3D CAD modeling (Oneshape, SolidWorks, Siemens NX, or similar).
• Solid background in mechanical design for electromechanical systems (actuators, motors, sensors)
• Knowledge of product design principles, tolerancing (tolerance stack up, GD&T), and material selection.
• Familiarity with electrical and control systems integration in mechatronic products.
• Experience with FEA
• Knowledge of DFMA principles
• Practical skills in hands-on prototyping, testing, and troubleshooting
• Proficient in English (spoken and written).

Nice to have:

• Experience designing highly integrated actuators and gearboxes and the relevant tools e.g. KISSsoft
• Experience with mechatronic design: Knowledge about sensors (e.g. inductive, optical, capacitive sensors), cable routing / harness design and electrical machines (PMSM with FOC) and the ability to integrate components into functional mechatronic systems.
• Previous work experience in the robotics or aerospace sectors.

What We Offer

• Competitive compensation package
• A front-row seat at one of Europe’s most ambitious robotics companies
• An energetic, collaborative team with a bias for action
• The opportunity to help shape the team’s culture from the ground up