Senior Prototype Engineer

Humanoid; Boston (MA); On-site; USD 115,000 - 160,000; Full time

Benefits offered by this job

Health insurance (US)

PTO 23 days (accrued)

401(k) with 4% match

Equity

Free daily catered lunch

Collaboration with top engineers

Product ownership

Job summary

Humanoid in Boston is seeking a Senior Prototype Engineer to join our Hardware team. This is a hands-on role where you will rapidly iterate, assemble, diagnose, and evolve advanced robotic platforms for real-world use.

You will collaborate with multidisciplinary engineers on prototype design, test procedures, and manufacturability, driving high throughput in a fast-paced startup.

Qualifications

• Experience with rapid physical prototyping in robotics or hardware
• Hands-on debugging of custom hardware and complex electrical systems
• Strong documentation habits: test plans, procedures, diagnostics, lessons learned
• Working knowledge of low-voltage and mixed-signal circuits, sensors, connectors
• Ability to collaborate across mechanical, electrical, and software teams

Responsibilities

• Lead troubleshooting of electrical issues in prototype humanoid robots and share learnings with teams
• Collaborate with multidisciplinary engineers on prototype design, assembly and bring-up
• Create and maintain clear test procedures, troubleshooting guides and repair runbooks
• Design and iterate on cable assemblies, test jigs and harnesses for repeated use
• Identify opportunities for process and product improvements to reduce downtime
• Support feedback loops to improve yield and manufacturability

Skills

Rapid physical prototyping

Hands-on hardware debug

Electrical systems troubleshooting

Low-voltage and mixed-signal circuits

Documentation and test plans

Cross-disciplinary collaboration

Design for manufacturability

Automated test/diagnostic tools

Job description

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

We're hiring a Senior Prototype Engineer to join our Hardware team based in Boston. This is a hands-on role where you will rapidly iterate, assemble, diagnose, and evolve advanced robotic platforms for real-world use.

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.

• Experience designing for manufacturability and reliability in the context of human‑sized or mobile robotics is a plus.

• Familiarity with automated test and diagnostic tools used in modern hardware labs.

What We Offer

• Comprehensive health coverage for US‑based employees, including fully paid medical, dental, and vision insurance, with virtual care and employee assistance resources.

• Meaningful time off to rest and recharge: 23 days of PTO (accrued), separate sick leave, and paid company holidays.

• 401(k) retirement plan with 4% employer match.

• Equity included–we believe builders should share in what they build.

• Free daily catered lunch, snacks, and drinks in‑office.

• Collaboration with top‑tier engineers, researchers, and product experts in AI and robotics.

• Freedom to influence the product and own key initiatives.

For this role in Massachusetts, the expected base salary range is $115K–$160K USD per year; your placement in that range depends on how your experience maps to our internal leveling.