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About Ironsite

The Role

What You'll Build

• Mechanical design and product architecture
• 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 on the aesthetic, ergonomic, and integration decisions that determine how Ironsite looks and feels.

• Camera integration and alignment
• 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.

• Sealing, thermal, and ruggedization
• 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.

• Manufacturing and DFM
• Design for mass production from day one. 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.

• Cross-functional partnership
• 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.

Technical Challenges You'll Solve

• Designing wearable hardware that survives active jobsites. Consumer wearables don't have to survive what construction wearables do. Dust, moisture, temperature extremes, direct impact, sustained vibration, and 8-12 hour daily use for years. You'll design the mechanical systems that hold up in the harshest wearable environment in the world.

• Holding optical alignment across environmental extremes. The camera has to stay in precise optical alignment through drops, temperature changes, and continuous vibration on a moving worker's head. Small mechanical shifts translate to image quality degradation at scale. You'll design the tolerances and mounting systems that keep the whole fleet in spec.

• Fitting more into less. Every new generation of Ironsite hardware needs to be more capable while getting smaller, lighter, and more comfortable. You'll make the density, weight, and ergonomic tradeoffs that let us pack more into less without compromising the workforce experience or the product performance.

• Designing for hundreds of thousands of units. Every mechanical decision has manufacturability, cost, and yield implications that compound at scale. You'll design for high-volume production from day one, and partner with manufacturing engineering to drive the DFM iterations that make ramp smooth rather than painful.

• Sealing and thermals at the wearable scale. IP67 in a device small enough to embed in a hardhat, thermal management for continuous camera and inference workloads, and durability that lasts years.

What We're Looking For

• 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. You've owned mechanical integration of imaging systems in production and can speak concretely about the tolerances, mounting strategies, and IQ tradeoffs you made.
• Experience shipping wearable products. You know what it takes to design something that has to be comfortable, durable, and reliable on a person's body for a full day, every day.
• 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 and injection-molded plastics.
• 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.

• Experience shipping wearable products at consumer volumes (Fitbit, Oura, Whoop, GoPro, Bose, Apple, Meta, Snap, or similar).
• Experience designing IP-rated devices (IP65 or higher) for outdoor or industrial use.
• Experience with drop, vibration, and environmental test design and validation.
• Experience with high-volume injection molding, tooling strategy, and mold flow analysis.
• Ability to generate clear technical documentation for internal teams, contract manufacturers, and executive stakeholders.

• Familiarity with contract manufacturers in Taiwan, mainland China, or Southeast Asia.
• Experience designing helmets, headwear, PPE, or other wearable products that mount on or around the head.
• Experience with FCC, CE, or other regulatory certification processes for wearable devices.
• Experience with battery pack and optical subassembly mechanical integration.
• Familiarity with electrical CAD tools (Altium, KiCad, Eagle) for cross-functional collaboration.
• Prior experience as an early mechanical or PDE hire at a hardware startup that scaled from early volumes to full production.

What Success Looks Like

• First 90 days. You know our hardware platform cold, including the current mechanical architecture, camera integration, enclosure design, and manufacturing process. You've contributed meaningful design improvements to a current or upcoming hardware revision.
• First 6 months. You've owned a major mechanical engineering initiative end to end, whether it's a next-generation enclosure design, a sealing or thermal redesign, or a form factor optimization that materially improves the workforce experience. Your work is shaping what ships next.
• First 12 months. You're the internal authority on mechanical design and product architecture at Ironsite. Our hardware is more durable, more manufacturable, and more comfortable for craft workers because of you. When we scale from thousands of devices to hundreds of thousands, we do it because the mechanical designs you created hold up.

Location, Compensation, & Perks

• San Francisco Bay Area (on-site)
• Base salary: $180k-$260k per year, commensurate with experience
• Significant early-stage equity
• Full benefits including health, dental, vision, and 401(k) with 6% match
• Daily catered lunch
• Office in San Francisco, next to Oracle Park and the Caltrain

Why This Role