Embedded / Firmware Engineer — Wearables

7 hours ago

PunePimpriChinchwad Area, India ONLYQ Full time

Company Description At ONLYQ, we’re reimagining what a health wearable can be. No screens. No noise. Just pure physiological intelligence, wrapped in a design that feels invisible but works continuously for you. We’re building the next-generation screenless health band powered by: - 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. ONLYQ is a self-funded initiative by the founders of Cymetree Projects LLP, giving us the freedom to innovate with long-term vision, zero bureaucracy, and global ambition. 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 in: - Electronics Engineering - Electronics & Telecommunication (E&TC) - Electrical Engineering - Instrumentation Engineering - Computer Engineering - Biomedical Engineering (with strong embedded exposure) Preferred: M.E. / M.Tech in: - 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)

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