Senior Actuation Engineer (Humanoid Joints) 资深执行器工程师（人形机器人）

At Mentee Robotics, we are redefining humanoid automation with an AI-first approach - combining perception, reasoning, and dexterous manipulation into fully autonomous systems that continuously learn and adapt.

在 Mentee Robotics，我们以 AI 优先的理念重新定义人形机器人自动化——将感知、推理与灵巧操作融合为能够持续学习与自适应的全自主系统。

We are now expanding with a new robotics Engineering Center in China, working hand-in-hand with our engineering teams in headquarters. Its mission: to rapidly develop our next-generation full-size humanoid and bring it to life - a walking, working platform that becomes the foundation of our next generation of products. This is a small, senior, hands-on team where speed of iteration is the core value.

我们正在中国设立全新的机器人工程中心，与总部的工程团队紧密协作。其使命是：快速研发我们下一代全尺寸人形机器人并使其落地——一个能行走、能工作的平台，成为我们下一代产品的基础。这是一支精干、资深、亲力亲为的团队，迭代速度是其核心价值。

We are looking for two Senior Actuation Engineers to design the joints of our humanoid - the single hardest hardware problem on the robot. You will own actuator modules end to end: motor selection, gear reduction, thermal design, sensing integration, and packaging - and you will cover the surrounding mechanical design (limbs, structure) as a secondary duty.

我们正在积极寻找2名资深执行器工程师加入，负责人形机器人关节整机——机器人硬件端难度最高的核心模块。你将全权负责关节模组全流程开发：电机选型、减速器方案、热设计、传感器集成、结构封装；同时兼顾配套肢体机械结构设计作为辅助工作。

Who you are 期待中的你

An actuator specialist first, a general mechanical engineer second
核心定位是执行器专业专家，通用机械结构设计为辅助能力
A first-principles thinker who questions assumptions and iterates fast
擅长基于第一性原理思考，敢于质疑固有方案，快速迭代验证
Hands-on in the lab: you build, instrument, and break your own designs
深度实验室实操能力：自主完成样机搭建、设备标定、破坏性测试验证自己的设计方案
Comfortable with ambiguity and rapidly changing requirements
能够适应需求不明确、方案快速调整的研发环境

Responsibilities岗位职责

Design high torque-density actuator modules for legs, waist, and arms: quasi-direct-drive architectures with planetary reduction - motor selection/specification, gear design, bearings, sealing, and packaging
针对机器人腿部、腰部、手臂开发高扭矩密度关节模组，采用准直驱+行星减速架构；全权负责电机选型定标、齿轮设计、轴承、密封与整机封装设计
Own the torque, speed, thermal, and mass budgets per joint, aligned with the system DOF and mass targets
对标整机自由度、重量指标，把控单关节扭矩、转速、散热、重量预算
Drive quasi-direct-drive vs. high-reduction trade-offs together with the motion control team
协同运动控制团队，完成准直驱方案与高减速比方案的性能取舍论证
Integrate sensing into the joint: encoders, temperature, and torque estimation provisions
关节传感器集成设计：编码器、温度采集、扭矩观测方案布局
Design the surrounding structure - limbs, torso frame, brackets - optimized for fast fabrication (machined plates, printed parts)
配套肢体、躯干框架、支架结构设计，适配机加工、3D打印等快速打样工艺
Own designs from concept through fabrication: CAD, tolerance analysis, DFM for prototype quantities, and supplier follow-up
全权负责设计从概念到量产样机全流程：三维建模、公差分析、小批量样机可制造性设计、供应商对接跟进
Run joint-level dyno and life testing with the V&V engineer; iterate based on data
联合测试验证工程师完成关节台架、耐久寿命测试，依据实测数据迭代优化方案
Work daily with electrical and embedded teams on the motor controller integration
日常协同电气、嵌入式团队完成电机控制器集成匹配

Requirements任职要求

B.Sc. or M.Sc. in Mechanical Engineering or Mechatronics
机械工程、机电一体化本科/硕士学历
8+ years designing electromechanical actuation systems: BLDC motors with planetary reduction, ideally in quasi-direct-drive (QDD) configurations
8年以上机电执行器系统开发经验，精通BLDC无刷电机+行星减速器方案，有准直驱（QDD）关节开发经验优先
Deep understanding of motor physics: torque constants, saturation, thermal limits, and their impact on transmission choice
精通电机底层原理：扭矩常数、磁饱和、散热极限，可基于电机特性匹配传动方案
Strong CAD skills (SolidWorks/NX/Creo) and proven concept-to-hardware track record
熟练使用SolidWorks/NX/Creo三维设计软件，具备完整从概念到实物落地的项目履历
Experience with structural design, materials selection, and prototype fabrication methods
具备结构设计、材料选型、样机加工工艺相关经验
Hands-on lab and test experience with rotating machinery
拥有旋转机械实验室实操、整机测试落地经验

Advantages加分项

Experience designing humanoid or quadruped joint modules
人形机器人/四足机器人关节模组独立开发经验
Experience with gear design and gear suppliers or custom motor winding specification
齿轮自主设计、齿轮供应商对接、定制电机绕组参数定义经验
Deep experience with proprioceptive actuation and backdrivability optimization
本体力感知关节、反向驱动性能优化深度开发经验
Thermal simulation and FEA experience
热仿真、有限元FEA分析实操经
Comfortable communicating technical topics in English with international teams
可流利使用英文与国际化团队同步技术方案