Firmware Developer

Company Overview: 

Dozee Health AI is a pioneer in Contactless Remote Patient Monitoring (RPM), proven to drive transformation at scale. Headquartered in Bengaluru, India, Dozee has emerged as a leader in this category. We are seeking talented individuals to help us in this very exciting journey. Candidates will be working with top healthcare providers in the country and leverage RPM's innovation to tackle healthcare's biggest challenges - from resource constraints to quality outcomes, to new care models

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. We are looking for an engineer who is passionate about embedded systems and enjoys building firmware that runs reliably on real-world devices at scale. Your firmware will run on 20,000+ devices deployed in the field , making reliability, maintainability, and careful engineering critical parts of the role. You will be involved across the complete firmware lifecycle  designing, developing, testing, debugging, releasing, and maintaining production firmware . You will work on areas including sensor acquisition, RTOS-based systems, connectivity, storage, device communication, and system reliability. This role is ideal for engineers who enjoy working close to hardware, solving complex problems, understanding how systems behave in the field, and taking ownership of their work from development through production.

Why This Role Exists As our device fleet and firmware capabilities continue to grow, we need engineers who can build reliable and maintainable firmware while continuing to improve existing systems already deployed in the field. Firmware changes can directly impact thousands of devices. This role exists to ensure that new features are designed carefully, tested thoroughly, and built to operate reliably under real-world conditions. You will work on both new development and existing production firmware , helping us improve reliability, add capabilities, investigate field issues, and build better firmware architecture for future products.

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