Embedded Firmware Engineer.

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