Embedded / Firmware Engineer — Wearables

16 hours ago

PimpriChinchwad, India ONLYQ Full time

Company DescriptionAt 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 & PPGBioimpedance + Temperature sensingIMU fusionAI-driven biomarker analyticsWomen’s health & autonomic intelligencePreventive, personalised insightsOur 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 DevelopmentDevelop, 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 IntegrationIntegrate and calibrate sensors such as:AS7058 (PPG + ECG AFE)AFE4950 (BioZ + ECG)MLX90632 (Temperature)AD5940 (Bioimpedance)Bosch BHI380 (IMU Fusion)BME688 (Environmental sensing)Communication & ProtocolsImplement BLE services (Nordic SoftDevice)Create custom BLE GATT profilesSupport OTA updates (DFU)System Architecture & ReliabilityDevelop robust state machines, task schedulers, and interrupt-driven firmwareOptimize for power, latency, and memory footprintDebug using JTAG/SWD, logic analyzers, and oscilloscopesTesting & ValidationUnit testing, sensor calibration routines, and quality benchmarkingWork with hardware team for DVT/PVT/MP testingEducational Qualifications Minimum:B.E. / B.Tech in:Electronics EngineeringElectronics & Telecommunication (E&TC)Electrical EngineeringInstrumentation EngineeringComputer EngineeringBiomedical Engineering (with strong embedded exposure)Preferred:M.E. / M.Tech in:Embedded SystemsVLSIElectronics DesignBiomedical Instrumentation(OR equivalent specialization)Additional Preferred Certifications:Embedded Systems diploma/certificate (CDAC, NIIT, Coursera, etc.)RTOS/Embedded Linux coursesBLE firmware development certificationsCore SkillsExcellent command of C/C++ for embedded systemsExperience with ARM Cortex-M microcontrollersStrong understanding of I2C, SPI, UART, DMA, interruptsExperience with Nordic nRF SDK / Zephyr OSPower-optimized firmware designSensor integration & real-time data streamingWearable-Specific Required SkillsExperience with PPG, ECG, IMU, BioZ sensor integrationReal-time signal acquisition and filteringNoise reduction + motion compensation knowledgeExperience with low-power wireless protocolsPreferred Skills (Bonus)Experience in medical/wellness devicesUnderstanding 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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