Sr. Electrical Engineer

Ironsite AI•San Francisco, CA

46d•$175,000 - $225,000•Onsite

About The Position

Ironsite is building the intelligence layer for the physical world. We design our own wearable hardware, deploy it alongside craft workers, and transform a shift's footage into a next-morning report. Our internal team and purpose-built models label the data overnight and deliver actionable insights to superintendents by 5 AM. We are accelerating the speed, efficiency, and predictability of construction, especially for complex, mission-critical infrastructure projects, including data centers, LNG facilities, sports stadiums, hospitals, and other large-scale developments, by training AI models on egocentric construction footage and labor productivity data. We are built with a pro-worker philosophy at our core: we believe technology should empower the workforce, not replace it. We're working to give craft workers and project leaders better visibility into what's happening on-site, while creating a system where the reality of construction and the chaos of each day is finally available to the people running the project. Ironsite is deployed across several of the largest active construction projects in the country. To date, we've captured more than 100,000 hours of construction footage across seven states, now process thousands of hours of site activity every day, and maintain a worker opt-out rate below two percent. This is enabled by a workforce-first architecture that anonymizes devices, captures no audio, and never releases raw video. Ironsite is backed by leading investors (8VC, South Park Commons, Saga Ventures) and prominent operators across technology and construction, including Eric Schmidt, Jeff Dean, Jeff Rothschild, Mark Leslie, Scott Wu, Eric Glyman, Karim Atiyeh, Russell Kaplan, and others, alongside over a dozen construction industry operators who have joined us as partners in building this. Longer term, we believe Ironsite is the foundation for what construction becomes in the next decade. We think the systems we're building are the operating system for how the physical world gets built, and will unlock a fundamentally different way of respect for our workforce. One where craft workers are more valued, more visible, and better paid for the skill they bring, and where the industry finally has the intelligence layer that makes autonomous construction possible. Both futures start with the same foundation. We're hiring a Senior Electrical Engineer to own the electrical architecture of Ironsite's wearable hardware. This is a foundational role on the hardware team. You'll design and validate the PCBs, power systems, and multi-sensor integration that make Ironsite's devices work reliably on active jobsites, on ruggedized wearables operating in some of the harshest environments in American industry. Power efficiency, sensor performance, thermal behavior, and integration density are all electrical engineering problems in this seat. If the hardware architecture doesn't hold up, nothing else does. You'll work directly with mechanical engineering, firmware engineering, manufacturing, and industrial design across the full product lifecycle, from initial concept through volume production. You'll own multi-layer PCB design, high-speed signal integrity, power management, and multi-sensor integration for optical, audio, wireless, IMU, and environmental subsystems. This is one of the most technically demanding seats in the company, and one of the highest-leverage.

Requirements

6+ years of hands-on experience shipping electrical designs on production hardware, with at least one full product lifecycle delivered in wearables, cameras, consumer electronics, or ruggedized hardware at real volume.
Deep expertise in multi-layer PCB design, schematic capture, and layout for mixed-signal and high-speed designs.
Strong experience with power system design, including battery management, charging, protection, and low-power techniques for wearable or portable devices.
Hands-on experience integrating optical imaging systems (MIPI CSI or similar), wireless connectivity (BLE, Wi-Fi, LTE), IMU, and environmental sensors into cohesive hardware platforms.
Experience with high-speed signal integrity analysis and design for reliable operation at production yields.
Comfort reading schematics, datasheets, and using standard hardware lab tools (oscilloscope, logic analyzer, network analyzer, thermal camera, protocol analyzers) to debug hardware and hardware-software integration issues.
Systems thinking across the full hardware stack. From silicon and PCB through mechanical integration and firmware, you understand how electrical decisions propagate throughout the product.
Experience working directly with contract manufacturers on hardware bring-up, DFM, DFT, and production ramp.
A background in Electrical Engineering, Computer Engineering, or a related field, or the equivalent experience.

Nice To Haves

Experience shipping wearable products at consumer volumes (Fitbit, Oura, Whoop, GoPro, Bose, Apple, Meta, Snap, or similar).
Experience with camera sensor integration and imaging system design, including selection, integration, and characterization of image sensors.
Experience designing for ruggedized industrial or outdoor environments (IP-rated devices, temperature extremes, EMI/EMC compliance).
Experience with battery cell selection, custom battery pack design, and battery safety certification.
Ability to generate clear and concise technical documentation for internal teams, contract manufacturers, and executive stakeholders.
Familiarity with contract manufacturers in Taiwan, mainland China, or Southeast Asia.
Experience with FCC, CE, or other regulatory certification processes for wearable or wireless devices.
Experience with prior electrical engineering leadership at a hardware startup that scaled from early volumes to full production.
Mandarin or Vietnamese language proficiency.
Familiarity with mechanical CAD tools (SolidWorks, Fusion 360) for cross-functional collaboration.

Responsibilities

Electrical architecture and PCB design.
Design multi-layer PCBs from concept through DFM, including schematic capture, layout, and signal integrity analysis for high-speed and mixed-signal designs.
Own end-to-end electrical architecture for wearable hardware programs, from feasibility through hardware bring-up and production release.
Optimize designs for size, power efficiency, thermal performance, and integration density, with the constraints that matter in a wearable running an 8-12 hour shift.
Drive component selection, sourcing collaboration with supply chain, and design tradeoffs across cost, performance, and manufacturability.
Power systems and battery integration.
Design and validate power delivery systems, including battery management, charging, protection circuits, and low-power modes.
Own the electrical side of battery selection and integration, and partner with mechanical engineering on packaging and thermal design.
Build the power architecture that supports continuous recording, encoding, wireless upload, and on-device inference across a full shift without failure.
Multi-sensor integration.
Integrate optical (imaging), audio (where relevant), wireless (BLE, Wi-Fi, LTE), IMU, and environmental sensors into a cohesive hardware platform.
Own high-speed interfaces (MIPI CSI, USB, PCIe, and similar) and the signal integrity work that makes them reliable at scale.
Partner with firmware engineering on sensor bring-up, driver validation, and system-level tuning.
Bring-up, validation, and test.
Lead hardware bring-up on new PCB revisions, from first power-on through validated production release.
Design and execute characterization and validation test plans across environmental conditions (temperature, humidity, vibration, EMI/EMC).
Own manufacturing test coverage, including ICT, functional test, and factory calibration in partnership with manufacturing engineering.
Cross-functional partnership.
Collaborate with mechanical, firmware, manufacturing, and industrial design across the full product lifecycle, from concept through DFM, DFT, and volume production.
Represent electrical engineering in design reviews, and drive design decisions that balance electrical, mechanical, firmware, and manufacturing constraints.
Support contract manufacturers with technical guidance, design updates, and issue resolution during production ramp.