Lead Sensors Engineer

The role

You will own the full non-EEG sensor system including architecture, hardware, and algorithms for a sensor-rich textile beanie. This includes focusing on PPG, inertial, body temperature, and environmental sensing.

What you will do

• Lead the sensor system architecture and R&D for non-EEG sensing.
• Design, select, and evaluate the sensor suite.
• Own heart-rate and HRV estimation and algorithms.
• Drive sensor front-end design and component selection.
• Develop signal conditioning, calibration, and characterization methods.
• Define the sensor-fusion approach.
• Specify electrical, mechanical, and firmware interfaces.
• Partner with AI/ML, product design, and reliability leads.
• Lead technical reviews and design documentation.
• Ship the product by end of year and build and lead the sensing team.

Required qualifications

• 10+ years in sensor or hardware development for consumer wearables.
• At least one shipped product where you owned a sensing system end-to-end.
• Deep expertise in optical PPG: front-end design and motion-robust heart-rate and HRV algorithms.
• Strong analog front-end design background, including noise, signal integrity, and low-power sensing systems.
• Experience integrating sensors in wearables: selection, calibration, characterization, and data analysis.
• Direct experience owning sensor selection, benchmarking, and BOM, including second-source strategy.
• Hands-on in the lab (oscilloscope, logic analyzer).
• Comfortable partnering with EE, firmware, and ME, and with overseas CMs.

Nice to have

• Inertial-sensing algorithms: activity, gesture, and context classification, and orientation estimation.
• Additional health sensors: SpO₂, ECG, EDA, or EMG.
• Contact-based body-temperature measurement: thermal modeling, calibration, and ambient compensation.
• Multimodal sensor fusion across optical, inertial, and temperature streams.
• Knowledge of human physiology or biomechanics.
• Biocompatible skin-contact and dry-contact sensor interfaces.
• Always-on, ultra-low-power sensing architectures.
• Founding engineer or lead-level experience at an early-stage consumer hardware company.

Benefits

• Competitive base salary
• Meaningful equity package
• 401(k) with company matching
• Health insurance
• Flexible PTO

Before you apply

• Evaluation completed within 14 days of first interview
• Offer letter dispatched same day as go decision, valid for 10 days
• Start date within 4 weeks of offer acceptance

About the company

Sabi is a small team building a noninvasive wearable that turns thought into text using EEG/BCI technology. They are developing a next-generation AI companion wearable.