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Apptronik is a human-centered robotics company developing AI-powered robots to support humanity in every facet of life. Our flagship humanoid robot, Apollo, is built to collaborate thoughtfully with people, starting with critical industries such as manufacturing and logistics, with future applications in healthcare, the home, and beyond. We operate at the cutting edge of embodied AI, applying our expertise across the full robotics stack to solve some of society's most important problems. You will join a team dedicated to bringing Apollo to market at scale, tackling the complex challenges like safety, commercialization, and mass production to change the world for the better. JOB SUMMARY As a Senior Hardware Test Engineer - Actuation, you will own the validation infrastructure for the robotic actuation systems that power Apptronik’s humanoid robots. This includes defining how actuators are tested, validated, and qualified before they are integrated into the robot and deployed to production. ESSENTIAL DUTIES AND RESPONSIBILITIES or KEY ACCOUNTABILITIES Actuation Test Ownership  Serve as the technical owner for manufacturing validation of robot actuators  Define test strategies for  servo-driven electromechanical systems , including: Calibration and Alignment Functional validation Performance characterization Fault detection and failure analysis  Ensure test coverage supports product reliability and manufacturability Test System Architecture  Define the  architecture and requirements for actuator test systems and fixtures Work with internal software teams to translate test requirements into automated test software Specify instrumentation and interfaces including: Servo drives and motor controllers EtherCAT motion networks Position, torque, current, temperature, and vibration sensors Data acquisition systems  Lead integration and validation of automated test stations  System Integration  Collaborate with controls, hardware, firmware, and systems teams to ensure testability is designed into actuator architectures  Support integration with manufacturing infrastructure including MES systems and production databases  Lead bring-up, debugging, and release of new test stations  Production Ramp & Sustaining Engineering  Support transition from engineering builds to high-volume manufacturing  Improve test processes for: Yield Cycle time Reliability detection  Investigate and resolve production issues related to actuator performance  Drive continuous improvement of test systems and validation methodologies  Manufacturing Enablement  Develop and maintain: Operator and technician  training materials Test equipment maintenance plans Calibration procedures Troubleshooting workflows Create clear, production-ready  documentation including test procedures, specifications, and system diagrams  SKILLS AND REQUIREMENTS Hands-on experience testing servo-driven actuators or motion systems  Strong understanding of: Servo control systems Motor drives Closed-loop feedback systems  Experience working with EtherCAT-based motion networks  Experience deploying automated test systems for hardware products  Proven ability to  lead complex technical projects from concept through production deployment Strong cross-functional collaboration with hardware, controls, and manufacturing teams Comfortable working in fast-paced robotics or hardware product environments EDUCATION and/or EXPERIENCE   Bachelor’s degree in Electrical, Electronic, Mechanical Engineering, or relevant experience. 7+ years of experience  in hardware test, manufacturing test, or system validation of electromechanical syste