# Mechanical Engineer, Actuator Design

> Raydar · Fremont, United States · Full-time · Posted 2026-11-12

**Salary:** USD 180,000–280,000

**Workplace:** on_site

## Description

About the company

Our client is a robotics company.

The role

Raydar is recruiting for this role on behalf of our client. Lead the mechanical architecture of compact motion hardware, turning machine performance needs into a buildable design. The work balances competing physical limits such as output force, weight, energy use and heat, with hands-on prototyping and testing.

What you'll do

\- Turn robot load and duty-cycle requirements into specific actuator targets for torque, speed, stiffness, life, packaging and temperature.

\- Weigh motor layout, gearing, bearings, cooling, sensing and drive limits, using test data to settle competing requirements.

\- Set the boundaries between mechanical hardware, power electronics and embedded code, covering electrical ceilings, sensor locations and how the unit responds to faults.

\- Build prototypes and debug hardware on the bench, owning CAD and analysis reviews and key technical decisions.

\- Plan characterization work with motor, controls and test engineers, and match measured results against models.

\- Lead design reviews, supplier choices and manufacturability work through to production release.

## Requirements

What we're looking for

\- Experience in in-house mechanical design.

\- Track record of taking a motion component or powered mechanism from design into shipped equipment.

\- Prior work on dense, high-output motion hardware with active cooling.

\- Strong depth in mechanical or mechatronic design.

\- Solid grasp of how electric machines, gearing, heat, sensing and power electronics constrain one another.

\- Practical record of building test units, verifying them, working with vendors and handing designs off to manufacturing.

\- Ability to work on-site in the role's location.

Bonus points

\- Experience at leading robotics or automotive companies.

\- Background in machine joint modules, factory drive equipment, electric vehicle propulsion or aircraft motion systems.

## Benefits

Compensation and benefits

\- Base salary: USD 180,000 to 280,000 per year

\- Equity

Location and work model

\- Fremont, California, United States

\- On-site

\- Full-time

## Apply

[Apply at Raydar](https://apply.workable.com/raydar/j/3A5FC24639/apply)

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