Lead Functional Safety Engineer

Redwood City, CA Engineering – Hardware /FT /On-site About Dexterity Dexterity is the enterprise Physical AI company building intelligent robots for complex industrial work.

Dexterity's Mech systems combine the Foresight World Model, robotics, and a Physical AI platform to perform demanding logistics workflows - including trailer loading, trailer unloading, and airport baggage handling - at the speed, reliability, and safety levels required for high-volume operations. Dexterity's Foresight World Model powers real-time perception, planning, and execution across physical environments with the interpretability required for industrial deployment.

Dexterity is headquartered in Redwood City, California.

Dexterity is backed by world-class investors such as Kleiner Perkins, Lightspeed Venture Partners, and Obvious Ventures. We are a diverse and multidisciplinary team with a culture built on passion, trust, and dedication.

About the Role Lead functional safety engineering for industrial robots, autonomous mobile systems, and motion-control and drivetrain architectures. Own the full safety lifecycle — from hazard and risk analysis through requirements, architecture, implementation, verification, and validation — to support compliant deployment in North American, European, and Japanese markets.

Responsibilities
- Create and maintain a Functional Safety Management Plan. Lifecycle, responsibilities, required work products, competence and independence requirements, and approval authority.

- Develop and maintain Quality Management System (QMS) integration. Define how safety activities, reviews, approvals, deviations, corrective actions, and audits run within the existing quality processes.

- Perform machinery risk assessments per ISO 12100; identify hazards, define safe states and safety functions, and determine required Performance Level (PLr) or Safety Integrity Level (SIL).

- Support compliance and certification activities with certification bodies, test laboratories, and external assessors, including UL, TÜV, NRTLs, notified bodies, and other relevant organizations.

- Interpret relevant regulations and standards, advise engineering teams on their practical application, and maintain awareness of changing robotics-safety and compliance expectations
- Develop and review safety architectures for E-stop, protective stop, Safe Torque Off (STO), safe stopping, safely limited speed, overspeed protection, brake control, restart prevention, and protective sensing.

- Apply ISO 13849-1/-2 and IEC 62061, including redundancy, diagnostics, MTTFd/PFH calculations, common-cause failure analysis, and validation.

- Analyze robotic and drivetrain failure modes, including motor and inverter faults, welded switching devices, encoder or feedback loss, brake, steering, and gearbox failures, unintended torque, overspeed, and loss of control.

- Define safety interfaces among safety PLCs, robot controllers, servo drives and inverters, motors, brakes, encoders, scanners, contractors, and safety I/O; specify safe behavior for communication loss or invalid data.

- Apply safety-rated communication protocols such as PROFIsafe, CIP Safety, and EtherCAT/FSoE, with working knowledge of PROFINET, Ether Net/IP, and other industrial networks as system interfaces.

- Perform HARA, FMEA/FMECA/FMEDA/DFMEA, fault tree analysis (FTA), fault injection testing, and safety-case analyses; translate results into traceable safety requirements and design evidence.

- Perform mechanical and structural analysis. Failure analysis for components whose failure can create or worsen a hazard, linked to inspection and proof-test needs.

- Plan and execute verification and validation activities covering stopping performance, response time, sensor and encoder faults,…