Senior Mechanical Engineer – Robotics & Mechatronics

Mechanical Engineer – Robotics & Mechatronics

San Francisco Bay Area | $150k–$250k + Equity | On-site

Calder Search is working with several well-funded, high-growth robotics and physical AI companies across the Bay Area, building complex autonomous and electromechanical systems for real-world applications.

We're looking for hands‑on Mechanical Engineers who want to design, build, test and ship real hardware - not spend their entire day sitting in CAD.

Depending on your background, you'll be working across:

• Mechanical and mechatronic subsystem design
• Precision mechanisms, motion systems and actuation
• Motors, sensors, actuators, bearings and transmissions
• CAD, tolerance analysis, GD&T and detailed design
• First‑principles calculations and FEA
• Rapid prototyping, CNC machining and 3D printing
• Hardware integration, build, test and troubleshooting
• DFM, supplier collaboration and production ramp

You'll work closely with electrical, controls, software and robotics engineers and have genuine ownership from initial concept through physical hardware and production
.

You don't need to tick every box.

What matters is that you've personally designed and built complex mechanical or electromechanical hardware and can talk confidently about the engineering decisions behind it.

Multiple positions from Mechanical Engineer through Senior Mechanical Engineer
, with venture-backed teams across San Francisco and the wider Bay Area.

$150k–$250k base + equity

Predominantly on‑site roles due to the hands‑on nature of the work.

If you're a mechanical engineer who likes building things that actually move
, I'd like to hear from you.