Senior Mechanical Engineer, Robotic Joints

1X is building humanoid robots for home use and is expanding the Body & Joints team in Hayward, CA. We seek a Senior Mechanical Engineer to design and own the mechanical systems that enable NEO to move safely and reliably around people. You will drive parts from concept through prototyping, validation, and production, emphasizing compact, lightweight, and manufacturable hardware. You will test prototypes, analyze performance, and collaborate with controls, electrical, manufacturing, reliability,