Senior Low-level Control Engineer - End-Effectors

Here at Humanoid, we believe in a future where robots amplify human potential. That’s why we’ve set out on a mission to build the world’s most capable, commercially-scalable, and safe humanoid robots. We’re bringing that mission to life with HMND‑01 Alpha - our rapidly developed humanoid platform now running in real industrial pilots - and we’re growing the team to take it even further.

About the Role

We are looking for a Senior Low-level Control Engineer to join our Control Team in London, focusing on control development and integration for our end-effectors. You will design, implement and validate actuator- and joint-level controllers and grasp-level behaviours across a family of end-effector variants - parallel and multi-finger grippers, vacuum and suction tooling, and purpose-built tooling for specific customer tasks. Each variant brings different actuation, different sensing and, critically, different transmission mechanisms: geared direct drives, cable- and tendon-driven routings, differential, coupled and underactuated designs where few actuators must produce adaptive, compliant grasping across many degrees of freedom.

The ideal candidate has a solid background in control theory, strong software engineering skills in C++, and comfort working from real-time embedded control up through kinematics/dynamics and hardware debugging. You will work closely with mechanical and hardware engineers - early enough in the design cycle that your input shapes actuation and transmission choices rather than merely inheriting them.

What You'll Do

• Low-Level Control Development: Tune and validate actuator- and joint-space control loops (PID, feedforward, impedance/admittance, observers, state feedback) for multi-DoF end-effectors in ROS2. Develop grasp-level behaviours: grasp force control, compliant closing, slip detection and correction, and adaptive grasping on underactuated grippers. Implement safety and fault-handling mechanisms — thermal and over-current protection, stall and jam detection, grip-loss detection, safe behaviour on fault.
• Transmission Mechanisms, Modeling & System Identification: Build and identify models of actuators, transmissions and mechanisms - geared, cable/tendon-driven, differential, coupled and underactuated - including compliance, friction, backlash, hysteresis, cable stretch and pretension effects. Own the joint-to-actuator abstraction for these mechanisms and the correct exposure of joint versus actuator state through the control stack. Contribute directly to transmission mechanism design: work with mechanical engineers on routing, reduction ratios, DoF coupling and underactuation strategy, bringing the controllability and observability consequences of each option into the conversation early.
• Sensor & Hardware Integration: Integrate and calibrate end-effector sensing (F/T, tactile, encoders, temperature/current, vacuum feedback) with real-time acquisition across the control stack. Hands‑on bring‑up and debugging of new end-effectors, including test‑stand work and vendor‑supplied units.
• Cross‑Disciplinary Collaboration: Close the loop with mechanical/electronics engineers across sites on actuation, transmission and sensing requirements. Work with data collection, applications and deployment teams so end-effectors work reliably in real use.

What We're Looking For

• Shipped real‑time‑safe, object‑oriented C++ control software running on real hardware.
• Tuned and validated controllers on physical actuators, including sensor calibration and bring‑up.
• Modelled, identified and controlled through real mechanical transmissions - gearing, cables/tendons, differentials, coupled linkages or underactuated mechanisms - and dealt with the compliance, friction and backlash they introduce.
• Worked on end‑effectors or comparable multi‑DoF mechanisms, including grasp control and supporting sensing.
• Debugged at the fieldbus and OS layer: e.g. EtherCAT or CAN, on an RTOS or real‑time Linux.
• Strong control theory foundation (linear/nonlinear control, stability, observers, state estimation, feedback/feedforward, filtering, frequency‑domain analysis) applied to multi‑DoF mechanisms via Jacobians, numerical IK/FK, and URDF/Xacro.

Nice to have:

• BLDC motor control (commutation, current control, torque optimization).
• ros2_control internals (hardware interfaces, controllers, controller_manager, plugins, lifecycle nodes).
• Tendon‑or cable‑driven mechanisms specifically, including pretension management, routing friction and wear behaviour.
• Tactile sensing integration; vacuum and suction tooling, including multi‑cup arrays and grip‑loss handling.
• System identification toolchains and simulation environments (MATLAB/Simulink, MuJoCo, Isaac Sim).

What We Offer

• Competitive equity: stock options with meaningful upside as we scale.
• 30+ paid days off, including 23 days of annual leave, all UK bank holidays, and additional company closure days (including Christmas–New Year shutdown).
• Private healthcare, including virtual and in‑person care.
• Pension scheme with 8% total contribution (5% employee, 3% employer) on full earnings.
• Free daily breakfast, catered lunch, and snacks in‑office.
• Work at the frontier - collaborate daily with world‑class engineers, researchers, and product experts building the next generation of AI and humanoid robotics.
• Real ownership - direct access to founding leadership, meaningful input on product direction, and the ability to drive key initiatives from day one.