Senior Prototype Engineer

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

• our rapidly developed humanoid platform being deployed in real industrial environments
• and we’re growing the team to take it even further.

As a Senior Prototype Engineer on the Core Platform team, you will rapidly iterate, assemble, diagnose, and evolve advanced robotic platforms for real-world use. In this hands-on role, you’ll drive results across the full hardware lifecycle—concepting, prototyping, root-cause analysis, documentation, and field repair—with a strong emphasis on reliability and repeatable processes.

• Lead troubleshooting and resolution of complex electrical issues in prototype humanoid robots, including operational and in-development systems; perform detailed failure analysis and share learnings with hardware/software engineering teams.
• Collaborate closely with multidisciplinary engineers on prototype design, assembly, and bring-up, especially high-density electromechanical integrations.
• Create, maintain, and execute clear test procedures, troubleshooting guides, and repair runbooks for the prototyping lab to ensure high standards and rapid iteration cycles.
• Design, document, and iterate on cable assemblies, test jigs, and harnesses optimized for repeated use on dynamic robotic platforms.
• Identify and own opportunities for continuous process and product improvement minimizing downtime and improving test/repair efficiency.
• Contribute to robust feedback loops across design, build, and test, driving first-pass yield and manufacturability.

Demonstrated experience in rapid physical prototyping, hands-on debug of custom hardware, and troubleshooting complex electrical systems in robotics or similar domains.

• Working knowledge of low-voltage and mixed-signal circuits, connectors, sensors, and compact electromechanical systems.
• Track record communicating concisely via documentation procedures, test plans, diagnostics, and lessons learned.
• Adept collaborating across mechanical, electrical, and software engineering boundaries to solve urgent, ambiguous issues.
• Comfortable in a high-velocity, high-ambiguity startup setting where priorities shift fast. PREFERRED
• Experience designing for manufacturability and reliability in the context of human-sized or mobile robotics.
• Familiarity with automated test and diagnostic tools used in modern hardware labs.
• Prior mentoring or technical leadership responsibility within a prototyping or field engineering team.

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.

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