Backed by Y Combinator.
About the role
H3X is hiring Mechanical Engineers focused on advanced manufacturing across all levels (Associate to Staff) to develop and scale our manufacturing processes from early-stage prototypes through full production. You'll do hands-on process development and production support, bridging R&D and sustained manufacturing so new technologies can be built reliably, efficiently, and at scale.
What they're looking for
- Experience scaling complex assemblies to higher production volume
- Experience designing manufacturing floor layouts
- Understanding of electric motors or high-voltage systems
- Experience working in a startup environment
- Experience with ISO9001 and/or AS9100 standards
More about this role
Whether you call yourself a mechanical engineer, a manufacturing engineer, or just someone who loves turning designs into hardware, if you want to own how the world’s most advanced electric motors get built, read on.
At H3X, we're building the most advanced electric motors in the world, powering the future of sustainable aviation, marine, industrial, and defense applications. Our motors range from 30 kW to 1 MW+ and are up to 3x lighter than competing platforms, driving a step change in electric propulsion technology.
Our team brings together some of the best minds from aerospace, defense, and motorsports, with deep expertise in electric machines, power electronics, material science, and advanced manufacturing. We're a small, fast-moving team doing hard engineering that matters, and we're looking for people who want to do the best work of their careers alongside us.
You'll have real ownership from day one, direct access to the people making decisions, and the chance to see your work go from whiteboard to hardware, in flight, on the water, or in the field, in a matter of months, not years. We move fast, we learn fast, and we celebrate wins together. You've probably worked somewhere...
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