Senior Firmware Developer

Dozee; Bengaluru; On-site; INR 900,000 - 1,500,000; Full time

Job summary

Dozee Health AI in Bengaluru seeks a Firmware Engineer II to design, develop and maintain production firmware for 20,000+ field devices. You will work across the firmware lifecycle from design through testing, debugging and release, focusing on reliability, scalability and observability.

You will tackle sensor acquisition, RTOS-based systems, connectivity, storage and device communication, collaborating with hardware teams to ensure robust firmware in real-world deployments.

Qualifications

• 3+ years of experience in embedded firmware development.
• Strong programming skills in C.
• Hands-on experience with RTOS such as Zephyr or FreeRTOS.
• Excellent understanding of embedded systems and microcontrollers.
• Experience with device drivers, SPI/I2C/UART, and CP/M consciousness on hardware.

Responsibilities

• Design, develop, test, and maintain embedded firmware in C.
• Develop firmware for RTOS-based systems and production devices.
• Own firmware modules 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 and OTA workflows.
• Write unit, integration, and hardware-level tests.

Skills

Embedded firmware

C programming

RTOS

Linux

Debugging

Git

Hardware interaction

Tools

Zephyr

FreeRTOS

Nordic nRF

ESP32

STM32

Job description

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