Senior Firmware Engineer - 8+Yrs

8+ years of professional embedded firmware or embedded systems engineering experience, with production experience shipping real products

Expert-level C, with a strong grasp of memory models, ISR safety, and critical-section design on ARM Cortex-M

Hands-on RTOS experience, with FreeRTOS required

Direct experience with at least one Nordic BLE SoC (nRF52 or nRF53 series) and one STM32 microcontroller family

Practical BLE experience: GAP/GATT, advertising/scanning, and a BLE stack such as Nordic SoftDevice or Zephyr

Integration experience with at least one cellular (LTE/GSM) or satellite (Iridium-class) communication module

Strong flash-memory background: flash filesystems, wear leveling, and bootloader/DFU design

I2C/SPI/UART sensor driver development, from datasheet to production

Comfortable using JTAG/SWD, logic analyzers, and oscilloscopes to root-cause intermittent field failures

Bachelor's degree in Electronics, Electrical Engineering, Computer Engineering, or a related field, or equivalent practical experience

Preferred:

Experience with marine electronics, industrial IoT, or other harsh-environment or battery-powered products

Underwater acoustic communications or DSP experience (FSK/PSK modulation, FFT/Goertzel demodulation, ARQ protocols)

Satellite-IoT ingestion experience beyond Iridium

Experience mentoring engineers or leading a small firmware team

Working knowledge of AES or other embedded cryptography

Responsibilities:

Design, develop, and maintain firmware for Nordic nRF52/nRF53 BLE SoCs and STM32L4 microcontrollers across the SC2, GIGO, D&T, and Diver Tracking Buoy product lines

Build and extend FreeRTOS-based task, queue, and mutex architectures, including safe ISR-to-task handoffs and critical-section design

Own BLE stack integration and scan arbitration so multiple concurrent scan modes share a single radio without interfering with each other

Integrate and maintain cellular, satellite, and GNSS connectivity, including store-and-forward and retry logic for unreliable links

Implement marine and industrial communication protocols (NMEA 0183/2000, AIS, Modbus RTU, SDI-12, J1939) behind a portable hardware-abstraction layer

Develop and debug I2C/SPI/UART sensor drivers, from datasheet to production, for pressure, IMU, temperature, and water-quality sensors

Manage on-chip and external flash storage, EEPROM, and dual-bank bootloader/DFU update flows, and diagnose flash corruption or timing issues

Implement and maintain encrypted device-to-server communication for field data transmission

Apply and enforce internal coding standards through code review, and produce supporting technical documentation for releases

Collaborate daily with PCB design, product, and cloud/server teams across India and the UK, and mentor junior firmware engineers

Note: Please send Cv only, who can attend the interview weekdays, with short notice period (max 15 days only)

Job Location: Mysore (work from office only)