Senior Mechanical Design Engineer

Menlo Park · USD 160,000-240,000 / year · 5+ years experience · Full-time · Onsite · Posted Sep 29, 2026

At a glance

As a Senior Mechanical Design Engineer, you’ll lead the design of critical subassemblies of our products.
Work closely with team members from hardware, software, and product teams to help us realize our vision of full home autonomy.

Own a critical subsystem end to end: requirements, architecture, detailed design, validation, tooling, and ramp
Turn a vague product goal into a set of engineering requirements and defend the ones that matter when they conflict
Make and own tradeoffs across cost, mass, acoustics, serviceability, manufacturability, and reliability, and explain the reasoning to people outside your discipline
Own the tolerance budget for the full assembly, not just individual stacks
Decide where to spend analysis, where to spend test, and where to just build it
Drive suppliers from tooling kickoff through T1 and T2 to a qualified process, and hold the line on quality when the schedule pushes back
Own the failure investigations in your area, from field returns back to root cause and corrective action
Raise the technical level of the engineers around you through design reviews, mentorship, and the standard you set on your own drawings

Evidence of independent technical judgment at subsystem scale
A subsystem you owned that shipped in volume, where you can walk through the architecture decisions, what you rejected, and what you got wrong
You've been through at least one full production ramp and can talk about what broke between T1 and mass production
Deep command of high volume manufacturing, particularly injection molding, at the level of tool design conversations with a supplier
You've built a tolerance and variation strategy for an assembly, including how you decided what to control and what to leave open
Test design judgment: you've built accelerated test plans that correlated to field data, and you know when an acceleration model does not apply
You've made a call under uncertainty, been wrong, caught it, and fixed it
You are still hands-on and can tell us the last thing you personally built, measured, or debugged yourself rather than delegating
You've owned something outside your discipline because the company needed it done and you were the one available
A technical degree in mechanical engineering or related field