Embedded / Firmware Engineer — Wearables

Company Description

ONLYQ

No screens.

No noise.

pure physiological intelligence

screenless health band

• Clinical-grade ECG & PPG
• Bioimpedance + Temperature sensing
• IMU fusion
• AI-driven biomarker analytics
• Women’s health & autonomic intelligence
• Preventive, personalised insights

Our mission:

A Lab on Hand — for every human.

self-funded initiative

And now, we’re assembling our core team.

Role Description & Qualification -

Firmware Development

• Develop, optimize, and maintain firmware on 

  Nordic nRF52/nRF54 Series (BLE 5.2/5.4)

• Implement ultra-low-power firmware architecture (sleep modes, RTC, timers)
• Build and optimize firmware for 

  real-time physiological signal acquisition

   (ECG, PPG, BioZ, Temperature, IMU)

Sensor Integration

• Integrate and calibrate sensors such as:
• AS7058 (PPG + ECG AFE)
• AFE4950 (BioZ + ECG)
• MLX90632 (Temperature)
• AD5940 (Bioimpedance)
• Bosch BHI380 (IMU Fusion)
• BME688 (Environmental sensing)

Communication & Protocols

• Implement BLE services (Nordic SoftDevice)
• Create custom BLE GATT profiles
• Support OTA updates (DFU)

System Architecture & Reliability

• Develop robust state machines, task schedulers, and interrupt-driven firmware
• Optimize for power, latency, and memory footprint
• Debug using JTAG/SWD, logic analyzers, and oscilloscopes

Testing & Validation

• Unit testing, sensor calibration routines, and quality benchmarking
• Work with hardware team for DVT/PVT/MP testing

Educational Qualifications

Minimum:

B.E. / B.Tech

• Electronics Engineering
• Electronics & Telecommunication (E&TC)
• Electrical Engineering
• Instrumentation Engineering
• Computer Engineering
• Biomedical Engineering (with strong embedded exposure)

Preferred:

M.E. / M.Tech

• Embedded Systems
• VLSI
• Electronics Design
• Biomedical Instrumentation
• (OR equivalent specialization)

Additional Preferred Certifications:

• Embedded Systems diploma/certificate (CDAC, NIIT, Coursera, etc.)
• RTOS/Embedded Linux courses
• BLE firmware development certifications

Core Skills

• Excellent command of 

  C/C++

   for embedded systems
• Experience with 

  ARM Cortex-M

   microcontrollers
• Strong understanding of 

  I2C, SPI, UART

  , DMA, interrupts
• Experience with 

  Nordic nRF SDK / Zephyr OS

• Power-optimized firmware design
• Sensor integration & real-time data streaming

Wearable-Specific Required Skills

• Experience with 

  PPG, ECG, IMU, BioZ

   sensor integration
• Real-time signal acquisition and filtering
• Noise reduction + motion compensation knowledge
• Experience with low-power wireless protocols

Preferred Skills (Bonus)

• Experience in 

  medical/wellness devices

• Understanding of physiological signal processing (ECG/PPG/HRV basics)
• Experience with 

  RTOS (FreeRTOS / Zephyr)

• Mobile app/BLE debugging tools (nRF Connect, LightBlue)
• Experience working with manufacturing / ODM teams (China/Taiwan/India)