Simbex is seeking an Embedded Firmware Engineer to develop production firmware for next-generation IoT wearable devices. In this role, you will build embedded software for low-power connected systems, integrate sensors and wireless technologies, and collaborate closely with electrical engineers to bring new hardware platforms to life. You'll play a key role in delivering reliable, high-performance firmware for innovative wearable products.
Responsibilities
Firmware Development
Design, develop, and maintain embedded firmware using C/C++
Develop firmware for ARM Cortex-M microcontrollers using an RTOS (Zephyr preferred)
Implement drivers and interfaces for peripherals including SPI, I2C, UART,
USB, and GPIO
Support board bring-up and hardware integration activities
Wireless & IoT
Develop Bluetooth Low Energy (BLE) applications for device communication and configuration
Implement over-the-air (OTA) firmware update capabilities
Support cloud connectivity using IoT communication protocols such as MQTT or CoAP
Optimize firmware for low-power operation
Sensor Integration
Integrate IMUs and other embedded sensors into production firmware
Support sensor fusion and motion-processing algorithms
Collaborate with algorithm developers to implement and optimize embedded solutions
Testing & Quality
Develop and execute unit, integration, and system-level tests
Troubleshoot firmware and hardware integration issues
Contribute to CI/CD workflows and software quality practices
Maintain technical documentation and support product verification activities
Required Qualifications
BS in Computer Engineering, Electrical Engineering, Embedded Systems, or related field
3-6 years of embedded firmware development experience
Strong C/C++ programming skills
Experience developing firmware for ARM Cortex-M microcontrollers
Experience with an RTOS (Zephyr preferred)
Experience with SPI, I2C, UART, USB, GPIO, and embedded peripherals
Experience with Bluetooth Low Energy (BLE)
Strong debugging and problem-solving skills
Preferred Qualifications
Experience with Zephyr RTOS
Experience with MCUboot or OTA firmware updates
Experience integrating IMUs or other motion sensors
Familiarity with sensor fusion or embedded signal processing
Experience with AWS IoT Core, Azure IoT Hub, or similar cloud platforms
Experience developing battery-powered or wearable IoT devices