Mechanical Designer

About Build AI

Build AI is the data hyperscaler for Physical AI. We're vertically integrated across hardware, manufacturing, logistics, collection, and model training to scale the physical labor dataset orders of magnitude faster than anyone in the world.

Job Summary

We're hiring mechanical design in Shenzhen for the structures that make collection hardware real: enclosures, mounts, wearability, thermal, drop, and the parts a factory can tool. A generalist who can also do industrial design is strongly preferred.

Key Responsibilities

• Own mechanical design of collection devices: enclosure, mount, stackup, fasteners, gaskets, how it survives a job site

• CAD through DFM/DFA, drawings, tooling, and incoming quality with Shenzhen vendors

• Apply DFM so designs scale from prototype to volume; own soft and hard tooling conversations with vendors

• Work with PCB on keepouts, connectors, and how the board lives in the object; work with ID on form

• Design for wear: a device that is uncomfortable does not get hours of data. Validate with drop, shock, and field failures

• Iterate in the factory. Close loops on yield, rework, and field returns

• Translate industrial design into manufacturable parts (plastics, sheet metal, as needed)

You may be a good fit if you have (Must-have qualifications)

• You've shipped mechanical parts into manufacturing: CAD (SolidWorks, Onshape, or equivalent), drawings, vendors, revisions

• Understanding of DFM/DFA and of plastics and/or sheet metal at cheap, high-volume hardware

• Fine in Shenzhen and in factories. You measure success in devices that stay on people and keep recording

• You resist overbuilt mechanisms that cut how many units we can field

Strong candidates may also have experience with (Nice-to-have qualifications)

• Industrial design skill (form, CMF, wearability). We would rather hire a generalist than a CAD-only specialist

• GD&T, injection molding, or experience with wearables / compact consumer hardware

• Tolerance, structural, or thermal analysis when it actually changes the design

• Experience working with ID on appearance surfaces

Benefits

• Competitive pay

• Medical, dental, and vision packages with generous premium coverage

• $500 per month credit for waiving medical benefits

• Housing subsidy of $2k per month for those living within walking distance of the office

• Relocation support for those moving to San Francisco (Financial District) or Shenzhen (Nanshan)

• Various wellness benefits covering fitness, mental health, and more

• Daily lunch and dinner in our office

• Unlimited compute budget subject to ROI justification

• Unlimited Codex and Claude credits

• Travel

How we're different

Build believes in the Bitter Lesson. By taking a general approach of learning from humans, our addressable market is all physical labor.

We are a fully in-person team in San Francisco (Financial District) and Shenzhen (Nanshan), and greatly value engineering skills. We do not have boundaries between engineering and research, and we expect all of our technical staff to contribute to both and work across disciplines as needed.

Build AI is an equal opportunity employer. We review every application. If you do not meet every bullet, still apply. Questions: [email protected]