Hardware Systems Engineer

San Francisco, CA April 21, 2026 Full Time

About Lumafield:

Founded in 2019, Lumafield has developed the world's first accessible X-Ray CT scanner for engineers. Our easy-to-use scanner and cloud-based software give engineers the ability to see their work clearly, inside and out, at an extremely affordable price.

Engineers make million-dollar decisions every day, and they need tools that give them the greatest possible insight into their products. By offering unprecedented visibility into products, as well as AI-driven tools that highlight problems and generate quantitative data, Lumafield promises to revolutionize the way complex products are created, manufactured, and used across industries.

We are an impact driven company obsessed with providing the best value to our customers keeping their needs at the center of our evolution. Our team today includes world-class researchers and industrial designers, PhDs, creators, founders of successful startups, and zero egos. We are backed by top venture capital funds like Kleiner Perkins, Lux Capital, DCVC, Spark Capital, and others.

The company is headquartered in Cambridge, MA and has an office in San Francisco, CA.

About the Role:

The Hardware Group is looking for a Hardware Systems Engineer to join our San Francisco office and own the breadth of hardware development for a new class of industrial CT scanners. You’ll span electrical architecture and design, MCU firmware, and system integration, partnering tightly with other engineering and product teams to bring prototypes from concept through to shipping product.

This is a hands-on, highly interdisciplinary role. You will be the hardware generalist closest to the product in San Francisco, collaborating with our team in Cambridge to carry system-level decisions all the way down to boards, firmware, and integrated prototypes. You’ll work alongside a small, fast-moving team that values curiosity, rigor, and system-level thinking.

This is a full-time, in-person role based in our San Francisco, CA office.

About the Role:

This is a full-time, in-person role based in our San Francisco, CA office.

Lumafield offers both competitive cash and equity compensation, as well as a health & wellness stipend, 401k, parental leave, flexible PTO, commuter benefits, company wide events and more!

Lumafield is committed to building a team that represents a variety of backgrounds, perspectives, and skills, because the more inclusive we are, the better our work will be. Do you feel like your skills don’t meet every single requirement listed? We encourage you to apply anyway – If you’re excited about our technology, the opportunity, and are eager to learn more we’d love to hear from you!

In keeping with our beliefs and goals, no employee or applicant will face discrimination or harassment based on: race, color, ancestry, national origin, religion, age, gender, marital domestic partner status, sexual orientation, gender identity, disability, genetic information or veteran status.

Reach out if you want to be a part of what we are building.

San Francisco Applicants: Review the San Francisco Fair Chance Ordinance guidelines applicable in your area.

What you'll do:

Drive the system architecture. Translate product-level requirements into a clear split across mechanical, electrical, and firmware, and make the buy-vs-build calls on the components that matter.

Select and qualify the critical parts (motors, sensors, actuators, motion controllers, power supplies) and own the rationale and tradeoffs.

Handle the light CAD yourself: MCAD for brackets, mounts, and fixtures; ECAD for embedded platforms and smaller PCBAs.

Build the prototypes. Turn a wrench, pull cables, bring up boards, and bring a pile of parts up to a working integrated system.

Write drivers for the peripherals you pull onto the product and land them in the appliance firmware and application stack with the Systems Software team.

Own test and validation. Plan it, fixture it, run it, analyze the data, and push corrective actions back into the design.

About you:

Several years of hands-on experience taking a complex electro-mechanical or robotics product from blank page to working hardware.

Breadth of knowledge in mechanical design, electronics, and embedded code. You don’t need to be the best in the room at any of the three, but you’ve done all three on real products.

Comfortable enough in MCAD and ECAD to produce your own simple designs without handing them off to a specialist.

A tinkerer at heart - you chase ambiguity into the hardware and keep digging until you understand why a system behaves the way it does.

Bonus points for:

Background in motion control, closed-loop systems, or sensor fusion.

Shipped a hardware product from first prototype to production at volume.

Experience with X-ray systems or other radiation-emitting equipment.