Mechanical Engineer

1X • San Carlos, CA

28d • $150,000 - $172,000 • Onsite

About The Position

We are building humanoid robots that work in any space humans exist with the mission to create an abundance of labor. This role is within the Quality, Test & Validation department. The Test & Validation team ensures our robot, NEO, can withstand real-world conditions. We build and operate test infrastructure, fixtures, and validation systems to help engineering teams understand robot performance, identify failures, and implement improvements before customer release. As a Test Fixture Design Engineer, you will focus on mechanical design, test engineering, and hands-on hardware. Your primary responsibility will be to design fixtures that enable rigorous, repeatable testing, from understanding the device under test and defining load paths to designing, manufacturing, assembling, and iterating the final hardware in the lab. Your charter is to design and deliver mechanical test fixtures that enable safe, accurate, and repeatable validation of NEO and its critical subsystems. You will own fixture development end-to-end, from concept to CAD, drawings, fabrication, assembly, test-cell installation, and iteration based on real-world test results. Designs should be robust, easy to manufacture, and minimize complexity, cost, and test-induced artifacts.

Requirements

• Bachelor’s degree in Mechanical Engineering or a closely related engineering discipline.
• 2-4 years of experience designing mechanical test fixtures, assembly fixtures, tooling, or similar custom hardware.
• Strong 3D CAD and 2D engineering drawing skills, with experience designing parts and assemblies for machining, fabrication, or rapid prototyping.
• Experience working with internal machine shops or external manufacturing vendors to turn designs into physical hardware.
• Practical understanding of mechanical testing, including loads, load paths, fixturing, interfaces, and safe test setup.
• Strong mechanical designer who can translate complex test requirements, interfaces, loads, and constraints into simple, robust fixture designs.
• Excellent CAD and engineering drawing skills with a strong understanding of tolerancing, materials, mechanical interfaces, and hardware.
• Practical understanding of manufacturing processes and DFM, with the judgment to balance performance, cost, lead time, and ease of assembly.
• Hands-on engineer who enjoys taking designs from CAD through fabrication and into a working test environment.
• Strong problem solver who can work from first principles and collaborate closely with Test, Design, Manufacturing, and external vendors.

Nice To Haves

• Experience designing fixtures for robotics, electromechanical systems, automotive, aerospace, consumer hardware, or other complex physical products.
• Experience using hand calculations or FEA to evaluate fixture strength, stiffness, deflection, or dynamic behavior.
• Hands-on experience assembling and bringing up test fixtures in a laboratory or engineering environment.
• Experience integrating sensors, actuators, wiring, or instrumentation into mechanical test fixtures.
• Experience with vibration, mechanical actuation, thermal, or environmental testing.

Responsibilities

• Design and deliver production-ready mechanical test fixtures on schedule that enable Test & Validation to execute critical validation and reliability testing across NEO hardware.
• Develop fixture designs that provide the required strength, stiffness, accuracy, repeatability, and safety without introducing unwanted constraints or artifacts into test results.
• Own complete fixture design packages, including 3D CAD, 2D drawings, materials, tolerances, hardware, interfaces, and assembly requirements.
• Drive successful manufacturing handoff by working directly with internal fabrication teams and external vendors to resolve DFM issues, manage quotes and lead times, and deliver hardware to test schedules.
• Bring fixtures from CAD into the lab through hands-on assembly, fit checks, installation, and test setup, rapidly iterating designs based on test-cell feedback.

Benefits

• Comprehensive medical, dental, and vision coverage
• Generous paid time off, company holidays, and parental leave
• 401(k) plan with company match (100% on the first 3% of contributions, 50% on the next 2%)
• Flexible Spending Accounts (FSA) and Health Savings Accounts (HSA) options
• Commuter benefits (transit and parking)
• Short-term and long-term disability, and life insurance
• Employee Assistance Program (EAP) for mental health, financial, and personal support
• Onsite snacks and catered lunches

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level