Firmware Developer

Role Overview:

We are looking for a Firmware Engineer II who is passionate about embedded systems and enjoys building firmware that runs reliably on real-world devices at scale.

Responsibilities:

• Design, develop, test, and maintain embedded firmware in C
• Develop firmware for RTOS-based systems
• Own firmware modules and features from design through production
• Develop and integrate drivers for sensors and peripherals
• Work with SPI, I²C, UART, GPIO, ADC, timers, and interrupts
• Build reliable sensor acquisition, processing, and buffering pipelines
• Develop and debug Wi-Fi and BLE functionality
• Implement device communication and cloud data upload workflows
• Work with Flash, SD cards, NVS, and other storage systems
• Develop robust error handling, watchdog, logging, and recovery mechanisms
• Work with bootloaders and firmware upgrade/OTA mechanisms
• Write unit, integration, and hardware-level tests
• Debug firmware and hardware issues using logs and debugging tools
• Investigate and resolve issues observed on devices deployed in the field
• Participate in firmware architecture, design, and code reviews
• Improve firmware reliability, maintainability, performance, and observability

Requirements

• 3+ years of experience in embedded firmware development
• Strong programming skills in C
• Good understanding of embedded systems and microcontrollers
• Hands-on experience with an RTOS such as Zephyr, FreeRTOS, or similar
• Good understanding of: Tasks/threads and scheduling, Interrupts, Queues, Mutexes and semaphores, Synchronization and concurrency
• Experience working with SPI, I²C, UART, GPIO, and interrupts
• Experience developing or integrating device drivers
• Strong understanding of pointers, memory management, bit manipulation, and data structures
• Ability to read datasheets, register maps, and hardware specifications
• Experience debugging hardware and firmware issues
• Comfortable working in a Linux development environment
• Experience with Git/Github
• Strong debugging and problem-solving skills

Good to Have Skills

• Experience with Nordic nRF, ESP32, or STM32 platforms
• Experience with Zephyr RTOS / nRF Connect SDK
• Experience with Wi-Fi and BLE
• Understanding of TCP/IP, HTTP/HTTPS, and TLS
• Experience with bootloaders and OTA/DFU firmware updates
• Familiarity with Device Tree and Kconfig
• Experience with Flash, SD cards, NVS, and file systems
• Experience with high-rate sensor data acquisition
• Understanding of ring buffers, FIFOs, CRC, and data packetization
• Familiarity with low-power embedded system design
• Python scripting for firmware testing and development tools
• Exposure to firmware CI/CD pipelines
• Experience with long-duration and stress testing of embedded devices
• Experience debugging issues on field-deployed devices