Senior Mechanical Engineer

Humanoid; Greater London; On-site; GBP 70,000 - 110,000; Full time

Benefits offered by this job

Stock options

30+ days leave and holidays

Private healthcare

Pension 8%" total contribution

In-office meals

Ownership and leadership access

Job summary

Humanoid is building the world’s most capable humanoid platform for real industrial environments. We seek a Senior Mechanical Engineer to own end-to-end mechanical design of robots and human-worn interfaces, from concept and CAD to manufacturing drawings and hand-off to production.

You will collaborate with electrical, firmware and prototyping teams to integrate sensors and PCAs, balance trade-offs, and drive designs through rapid iteration in a fast-paced setting while maintaining strong

Qualifications

• 5+ years in mechanical design for robotics or electromechanical products.
• Strong CAD skills with Siemens NX and experience in GD&T.
• Experience designing for 3D printing, CNC, injection moulding and sheet metal.
• Ability to prototype and iterate quickly in a fast-paced environment.

Responsibilities

• Own mechanical design of components, assemblies, and enclosures end-to-end from concept to production release.
• Integrate cameras, sensors, PCBs, and other devices into mechanical systems with cross-functional teams.
• Balance weight, durability, ergonomics and manufacturability in designs.
• Select materials and processes including 3D printing, CNC, sheet metal and injection moulding.
• Prototype, test, and refine designs based on feedback from engineering and customers.
• Work directly with customers to capture requirements and develop test plans.
• Apply DFM/DFA principles as designs move to production.
• Plan and support mechanical validation tests (structural, environmental, durability).

Skills

Siemens NX CAD

GD&T

DFM/DFA

Mechatronics integration

Prototyping

Education

Bachelor/Master in Mechanical Engineering

Tools

CNC machining

3D printing

Sheet metal

Injection moulding

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 looking for a Senior Mechanical Engineer to design and iterate end effectors for our robots and the human-worn devices operators use to interface with them. You'll own mechanisms and assemblies end to end — from concept and CAD through to manufacturing drawings and production hand-off — working closely with electrical, firmware and prototyping engineers. This is a hands‑on role where you'll balance rapid iteration with rigorous engineering fundamentals, in a high‑paced environment where designs evolve quickly and priorities shift fast.

What you'll do

• Own Mechanical Design: Design mechanical components, assemblies and enclosures end-to-end using 3D CAD (Siemens NX), from concept through to manufacturing-ready drawings.
• Integrate Mechatronic Systems: Integrate cameras, sensors, PCBAs and other mechatronic devices into mechanical assemblies, working closely with electrical and firmware engineers.
• Balance Design Trade-offs: Weigh weight, durability, ergonomics and manufacturability requirements to arrive at the right solution for each design.
• Select Materials & Processes: Choose appropriate materials and manufacturing processes, including 3D printing, CNC machining, sheet metal and injection moulding.
• Prototype & Iterate: Rapidly prototype and refine designs based on testing, trials and feedback from engineering and customers.
• Engage with Customers: Work directly with customers to develop requirements and test plans that shape design decisions.
• Apply DFM/DFA: Apply design-for-manufacture and design-for-assembly principles as designs move from prototype to production.
• Support Validation: Plan and support mechanical validation and testing, including structural, environmental and durability testing.

What we're looking for

• Degree in Mechanical Engineering, Mechatronics, or a related discipline, with 5+ years' experience in mechanical design for robotics, hardware, or complex electromechanical products.
• Proficiency in 3D CAD (Siemens NX preferred, or strong willingness to learn), including GD&T and tolerance stack-up analysis.
• Experience designing for 3D printing, CNC machining, injection moulding and sheet metal, with hands‑on rapid prototyping experience.
• Experience integrating electromechanical assemblies — cameras, sensors, PCBAs, connectors, cable routing and enclosures.
• Experience working with customers or stakeholders to develop requirements and test plans.
• Practical understanding of DFM/DFA principles and comfort working iteratively in a high‑paced engineering environment.

Nice to have

• FEA/simulation experience for stress, fatigue or thermal analysis
• Experience designing wearable or human-worn hardware
• Exposure to small‑batch or production manufacturing hand-off

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.