William (Billy) Plummer

Robotics Hardware

San Francisco, California, United States

About

I’m a design engineer committed to developing novel, relevant, and exciting hardware products. I've worked across the engineering development cycle from blank sheet to production ready. https://www.williamplummer.com/

Experience

  • Mechanical Engineer at Sunday
    Jun 2025 - Present · 1 yr 2 mos

    Leave it to sunday...but check us out right now - https://www.sunday.ai/

  • Relocation at Career Break
    Jan 2025 - Jun 2025 · 6 mos

    Took a few months to tinker, relax, and generally put roots down again after returning to SF

  • Mechanical Design Engineer at Mytos
    Jan 2024 - Nov 2024 · 11 mos

    Automating human cell growth!

  • Mechanical Design Engineer at Matician
    Aug 2021 - Jul 2023 · 2 yrs

    I worked as lead designer of the cleaning head systems on the flagship autonomous cleaning robot. The work was immensely diverse and involved taking the systems - which comprise hundreds of components and multiple physics domains - from a crude prototype to a scalable and elegant solution. I designed collectively thousands of prototype parts, empirical tests, and system models to perfect system efficacy, reliability, and to optimise for scalability. This work culminated in the production design, which saw me develop hundreds of molded parts, custom motorised systems, and user-facing mechanisms, taking each from blank sheet to optimised production tooling with vendors across the world. Being a startup setting, I had the opportunity to work on sourcing, internal process development, manufacturing, and many more tangents to the core engineering process with an incredibly talented small team.

  • Mechanical Engineer at Lucid Motors
    Jul 2020 - Aug 2021 · 1 yr 2 mos

    I worked with the High-Voltage Mechanical team, splitting my time between a major motorsports inverter design project and the production design of the Air inverter. Working with a lean team of experts (internal and external) I worked to architect, prototype and detail a suite of electromechanical systems - from molded, soldered, machined, and everything in between - into an impossibly energy dense inverter for the Formula E Gen3 FPK units. The scope of work included early ideation, concept detailing, early prototyping and pre-production verification testing covering performance, electrical safety and mechanical robustness. On the production inverter, I owned the design of numerous molded plastic parts. I sustained these designs through multiple tooling changes, verification tests, and early production builds.