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About the Role

Ironsite is seeking a Prototyping Lab Technician to build, test, and iterate on new hardware ideas, transforming them into field-ready devices. This role involves hands-on work with hardware, close collaboration with engineering teams, and direct involvement in the loop from lab to field validation.

Responsibilities

• Assemble complex electromechanical prototypes and proof-of-concept devices.
• Perform fine-pitch SMT and through-hole soldering, PCB rework, wire harness assembly, and connector crimping.
• Support new hardware revisions through iterative build cycles, ensuring high build quality.
• Design custom test fixtures, jigs, cabling harnesses, and small mechanical parts in CAD.
• Fabricate custom parts using rapid prototyping tools like 3D printers, laser cutters, and CNC mills.
• Iterate quickly on fixture and part designs based on build and test process needs.
• Run functional, stress, reliability, and environmental tests according to engineering plans.
• Use standard lab instrumentation to characterize hardware and isolate issues.
• Collect, document, and report clean test data.
• Get new hardware revisions from the lab onto active jobsites for real-world testing.
• Prepare, pack, and ship prototype devices with necessary documentation.
• Debug field issues remotely and travel to jobsites to support hardware validation.
• Bring structured feedback from the field back into the lab for future iterations.
• Identify, debug, and troubleshoot prototype hardware or wiring issues.
• Support engineering investigations with data and hands-on iteration.
• Help engineers separate design issues from build issues.
• Maintain an organized, safe, and well-equipped R&D workshop.
• Manage parts inventory, tool calibration, and equipment upkeep.
• Keep the lab ready for the next build cycle.

Requirements

• 2-5+ years of hands-on experience as an R&D technician, prototype assembler, or bench technician.
• Strong proficiency in soldering (SMT and through-hole), component rework, wire stripping, and connector crimping.
• Strong mechanical assembly skills using precision tools.
• Working proficiency in CAD (SOLIDWORKS, Onshape, Fusion 360, or similar) for designing and iterating on test fixtures, custom cabling, and small mechanical pieces.
• Hands-on experience with rapid prototyping tools: 3D printers, laser cutters, or benchtop CNC.
• Ability to read and interpret mechanical CAD drawings, electrical schematics, and bills of materials.
• Familiarity with standard electrical test equipment: multimeters, oscilloscopes, power supplies, logic analyzers.
• Strong practical troubleshooting skills and a methodical approach to identifying hardware bugs.
• Clear written and verbal communication skills.
• Willingness to travel to active jobsites occasionally (typically a few days per month).
• Comfort working in a fast-paced startup environment where priorities shift quickly.
• Prior experience supporting hardware development at a wearables, consumer electronics, or ruggedized hardware company is strongly preferred.
• IPC-A-610 or IPC J-STD-001 soldering certifications are strongly preferred.
• Experience supporting field deployment or field testing of hardware is strongly preferred.
• Basic familiarity with microcontroller setup (Arduino, Raspberry Pi, or similar) or automated test software (LabVIEW, Python scripts) is preferred.
• Associate's degree or trade certification in Electronics, Mechanical Technology, or a related field is nice to have.
• Experience supporting camera or optical assembly work is nice to have.
• Familiarity with battery pack assembly and safe handling procedures is nice to have.
• Experience with small production runs, pilot builds, or NPI ramp support is nice to have.

Skills

• Soldering
• SMT soldering
• Through-hole soldering
• PCB rework
• Wire harness assembly
• Connector crimping
• CAD design
• SOLIDWORKS
• Onshape
• Fusion 360
• 3D printing
• Laser cutting
• CNC machining
• Electrical schematics interpretation
• Bill of Materials interpretation
• Multimeter usage
• Oscilloscope usage
• Power supply usage
• Logic analyzer usage
• Troubleshooting
• Communication
• Microcontroller setup
• Automated test software
• LabVIEW
• Python scripting
• Camera assembly
• Optical assembly
• Battery pack assembly
• NPI support

Location

• San Francisco Bay Area

Work Type

• On-site
• Occasional travel

Experience Level

• 2-5+ years

Education Level

• Associate's degree or trade certification (nice to have)

Salary/Compensations

• $100k-$200k per year

Benefits

• Significant early-stage equity
• Health insurance
• Dental insurance
• Vision insurance
• 401(k) with 6% match
• Daily catered breakfast and lunch

About the Company

• Ironsite is building the intelligence layer for the physical world, designing wearable hardware and using AI models to analyze construction footage and provide actionable insights.
• The company accelerates construction speed, efficiency, and predictability for complex infrastructure projects.
• Ironsite operates with a pro-worker philosophy, aiming to empower the workforce through technology.
• The company's technology provides better visibility on-site for craft workers and project leaders.
• Ironsite is deployed on large construction projects, having captured over 100,000 hours of footage.
• The company processes thousands of hours of site activity daily with a worker opt-out rate below two percent.
• Ironsite's workforce-first architecture anonymizes devices, captures no audio, and never releases raw video.
• Ironsite is backed by leading investors and prominent operators in technology and construction.
• The company believes it is building the foundation for the future of construction, creating an operating system for the physical world.
• Ironsite aims to foster greater respect for the workforce, valuing craft workers and enabling autonomous construction.