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About the Role

We are hiring a Senior Product Design Engineer to own the mechanical design and product architecture of Ironsite's wearable hardware. This is a foundational role on the hardware team, responsible for designing enclosures, mechanisms, mounts, and thermal systems that ensure Ironsite's cameras and electronics can withstand the rigors of active jobsites. You will work across the full product lifecycle, collaborating with electrical, firmware, and manufacturing engineering.

Responsibilities

Own the mechanical design of Ironsite's wearable hardware end to end, from initial concept and industrial design collaboration through DFM, tooling, and volume production.
Design enclosures, mechanisms, and mounts for wearable devices that integrate cameras, PCBAs, batteries, and sensor subassemblies into a small, lightweight, comfortable form factor.
Balance the tradeoffs that matter in a wearable that has to sit on a hardhat all day: weight, size, thermal performance, sealing, ergonomics, and manufacturability.
Partner with industrial design and Studson on the aesthetic, ergonomic, and integration decisions that determine how Ironsite looks and feels on the workforce.
Design the mechanical systems that hold the camera in precise optical alignment across temperature, vibration, and impact.
Own the tolerances, mounting geometry, and manufacturing controls that keep image quality consistent across every device in the fleet.
Partner with electrical and firmware engineering on camera bring-up and image quality validation.
Design sealing and gasketing systems that hit IP67 targets in real jobsite conditions (dust, moisture, weather exposure).
Design thermal management systems that keep the device operating reliably across environmental extremes and continuous recording loads.
Own drop, vibration, and environmental test plans, and iterate on designs until they pass in the field, not just in the lab.
Design for mass production from day one, considering sheet metal, injection-molded plastics, custom castings, and electromechanical assemblies.
Own the DFM review process with our contract manufacturer, drive tooling qualification, and support first-article inspection and production ramp.
Partner with manufacturing engineering on tooling strategy, cycle time reduction, and yield improvement initiatives.
Collaborate with electrical and firmware engineers on PCBA integration, connectors, cable routing, and system-level design decisions.
Represent mechanical engineering in design reviews, and drive design decisions that balance mechanical, electrical, firmware, and manufacturing constraints.
Support contract manufacturers with technical guidance, design updates, and issue resolution during production ramp.

Requirements

5+ years of hands-on experience designing and shipping physical products, with at least one full product lifecycle delivered in wearables, cameras, or ruggedized consumer or industrial hardware at real volume.
Deep experience designing camera integration and optical alignment systems.
Experience shipping wearable products.
Deep expertise designing rugged electromechanical devices for harsh outdoor environments, including sealing, gasketing, and thermal management for enclosures containing electronics.
Strong experience designing parts for mass production, particularly sheet metal, injection-molded plastics, and custom castings.
Hands-on experience working directly with contract manufacturers through DFM reviews, first-article inspection, tooling qualification, and production ramp.
Proficiency with parametric CAD (Onshape, SOLIDWORKS, Siemens NX, Creo, or similar) and comfort with tolerance analysis, FEA, and DFM analysis tools.
Strong cross-functional collaboration with electrical and firmware engineers on PCBA integration, connectors, cable routing, and system-level architecture.
A background in Mechanical Engineering, Product Design Engineering, or a related field, or the equivalent experience.

Skills

Mechanical design
Product architecture
Wearable hardware design
Enclosure design
Mechanism design
Mount design
Thermal systems design
Camera integration
Optical alignment
Sealing and gasketing
Ruggedization
DFM (Design for Manufacturability)
CAD (Onshape, SOLIDWORKS, Siemens NX, Creo)
Tolerance analysis
FEA (Finite Element Analysis)
Sheet metal design
Injection molding design
Custom casting design
Electromechanical assembly design
Cross-functional collaboration
Technical documentation

Location

San Francisco Bay Area

Work Type

On-site

Experience Level

Senior

Education Level

Mechanical Engineering, Product Design Engineering, or related field, or equivalent experience

Salary/Compensations

$175k-$225k per year

Benefits

Significant early-stage equity
Full benefits including health, dental, vision, and 401(k) with 6% match
Daily catered breakfast and lunch

About the Company

Ironsite is building the intelligence layer for the physical world, designing its own wearable hardware and using AI to transform jobsite footage into actionable insights for the construction industry.
We accelerate the speed, efficiency, and predictability of complex construction projects by training AI models on egocentric construction footage and labor productivity data.
Our philosophy is pro-worker, believing technology should empower the workforce.
Ironsite is deployed across major construction projects, capturing extensive footage while prioritizing worker privacy through anonymized devices and no audio recording.
The company is backed by leading investors and prominent figures in technology and construction.
We believe Ironsite is the foundation for the future of construction, aiming to create a more respected and valued workforce through advanced intelligence systems.