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.

About the Role

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.

What You'll Do

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.

What We're Looking For

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.

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.